Call: (8) interpret(off, [[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (8) interpret(off, [[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5554, [], _G5556)
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5545, _G5548, ":-", _G5557]
   Exit: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], _G5572)
   Unify: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5572, [], _G5574)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], _G5572)
   Unify: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]|_G5564])
   Exit: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (9) interpret1(off, [[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
^  Call: (10) retractall(debug(_G5566))
^  Exit: (10) retractall(debug(_G5566))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5570))
^  Exit: (10) retractall(cut(_G5570))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (10) member1([[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["a", "b"], ["a", "b"], [v, d]]]=[_G5574, _G5577]
   Exit: (11) [[n, f], [["a", "b"], ["a", "b"], [v, d]]]=[[n, f], [["a", "b"], ["a", "b"], [v, d]]]
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5586, ":-", _G5595]|_G5581]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["a", "b"], ["a", "b"], [v, d]], _G5606)
   Unify: (11) length([["a", "b"], ["a", "b"], [v, d]], _G5606)
   Exit: (11) length([["a", "b"], ["a", "b"], [v, d]], 3)
   Call: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Exit: (11) length([[v, c], [v, b], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) checkarguments([["a", "b"], ["a", "b"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5608, [], _G5610)
   Unify: (11) checkarguments([["a", "b"], ["a", "b"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5608, [], _G5610)
   Call: (12) [["a", "b"], ["a", "b"], [v, d]]=[_G5598|_G5599]
   Exit: (12) [["a", "b"], ["a", "b"], [v, d]]=[["a", "b"], ["a", "b"], [v, d]]
   Call: (12) expressionnotatom(["a", "b"])
   Unify: (12) expressionnotatom(["a", "b"])
   Call: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) var(["a", "b"])
   Fail: (14) var(["a", "b"])
   Redo: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) isval(["a", "b"])
   Unify: (14) isval(["a", "b"])
   Call: (15) number(["a", "b"])
   Fail: (15) number(["a", "b"])
   Fail: (14) isval(["a", "b"])
   Redo: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) string(["a", "b"])
   Fail: (14) string(["a", "b"])
   Fail: (13) isvalstrempty(["a", "b"])
   Redo: (12) expressionnotatom(["a", "b"])
   Unify: (12) expressionnotatom(["a", "b"])
^  Call: (13) not(atom(["a", "b"]))
^  Unify: (13) not(user:atom(["a", "b"]))
^  Exit: (13) not(user:atom(["a", "b"]))
   Call: (13) length(["a", "b"], _G5614)
   Unify: (13) length(["a", "b"], _G5614)
   Exit: (13) length(["a", "b"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["a", "b"])
   Unify: (13) expressionnotatom2(["a", "b"])
   Call: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) var("a")
   Fail: (15) var("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) isval("a")
   Unify: (15) isval("a")
   Call: (16) number("a")
   Fail: (16) number("a")
   Fail: (15) isval("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) string("a")
   Exit: (15) string("a")
   Exit: (14) isvalstrempty("a")
   Call: (14) expressionnotatom2(["b"])
   Unify: (14) expressionnotatom2(["b"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["b"])
   Exit: (13) expressionnotatom2(["a", "b"])
   Exit: (12) expressionnotatom(["a", "b"])
   Call: (12) [[v, c], [v, b], [v, d]]=[_G5606|_G5607]
   Exit: (12) [[v, c], [v, b], [v, d]]=[[v, c], [v, b], [v, d]]
^  Call: (12) not(var([v, c]))
^  Unify: (12) not(user:var([v, c]))
^  Exit: (12) not(user:var([v, c]))
   Call: (12) isvar([v, c])
   Unify: (12) isvar([v, c])
   Exit: (12) isvar([v, c])
   Call: (12) putvalue([v, c], ["a", "b"], [], _G5624)
   Unify: (12) putvalue([v, c], ["a", "b"], [], _G5624)
^  Call: (13) not(isvar([v, c]))
^  Unify: (13) not(user:isvar([v, c]))
   Call: (14) isvar([v, c])
   Unify: (14) isvar([v, c])
   Exit: (14) isvar([v, c])
^  Fail: (13) not(user:isvar([v, c]))
   Redo: (12) putvalue([v, c], ["a", "b"], [], _G5624)
   Call: (13) isvar([v, c])
   Unify: (13) isvar([v, c])
   Exit: (13) isvar([v, c])
   Call: (13) isvalstrorundef(["a", "b"])
   Unify: (13) isvalstrorundef(["a", "b"])
   Call: (14) var(["a", "b"])
   Fail: (14) var(["a", "b"])
   Redo: (13) isvalstrorundef(["a", "b"])
   Unify: (13) isvalstrorundef(["a", "b"])
^  Call: (14) not(var(["a", "b"]))
^  Unify: (14) not(user:var(["a", "b"]))
^  Exit: (14) not(user:var(["a", "b"]))
   Call: (14) isval(["a", "b"])
   Unify: (14) isval(["a", "b"])
   Call: (15) number(["a", "b"])
   Fail: (15) number(["a", "b"])
   Fail: (14) isval(["a", "b"])
   Redo: (13) isvalstrorundef(["a", "b"])
   Unify: (13) isvalstrorundef(["a", "b"])
^  Call: (14) not(var(["a", "b"]))
^  Unify: (14) not(user:var(["a", "b"]))
^  Exit: (14) not(user:var(["a", "b"]))
   Call: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) atom(["a", "b"])
   Fail: (15) atom(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
^  Call: (15) not(atom(["a", "b"]))
^  Unify: (15) not(user:atom(["a", "b"]))
^  Exit: (15) not(user:atom(["a", "b"]))
   Call: (15) length(["a", "b"], _G5632)
   Unify: (15) length(["a", "b"], _G5632)
   Exit: (15) length(["a", "b"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["a", "b"])
   Unify: (15) expression2(["a", "b"])
   Call: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) expression3("a")
   Call: (16) expression2(["b"])
   Unify: (16) expression2(["b"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["b"])
   Exit: (15) expression2(["a", "b"])
   Exit: (14) expression(["a", "b"])
   Exit: (13) isvalstrorundef(["a", "b"])
   Call: (13) updatevar([v, c], ["a", "b"], [], _G5634)
   Unify: (13) updatevar([v, c], ["a", "b"], [], _G5634)
   Call: (14) lists:member([[v, c], empty], [])
   Fail: (14) lists:member([[v, c], empty], [])
   Redo: (13) updatevar([v, c], ["a", "b"], [], _G5634)
^  Call: (14) not(member([[v, c], _G5630], []))
^  Unify: (14) not(user:member([[v, c], _G5630], []))
^  Exit: (14) not(user:member([[v, c], _G5630], []))
   Call: (14) _G5630=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, c], ["a", "b"]]], _G5654)
   Unify: (14) lists:append([], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]]])
   Exit: (14) lists:append([], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, c], ["a", "b"], [], [[[v, c], ["a", "b"]]])
   Exit: (12) putvalue([v, c], ["a", "b"], [], [[[v, c], ["a", "b"]]])
   Call: (12) checkarguments([["a", "b"], [v, d]], [[v, b], [v, d]], [[[v, c], ["a", "b"]]], _G5655, [], _G5657)
   Unify: (12) checkarguments([["a", "b"], [v, d]], [[v, b], [v, d]], [[[v, c], ["a", "b"]]], _G5655, [], _G5657)
   Call: (13) [["a", "b"], [v, d]]=[_G5645|_G5646]
   Exit: (13) [["a", "b"], [v, d]]=[["a", "b"], [v, d]]
   Call: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
   Call: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Fail: (14) isvalstrempty(["a", "b"])
   Redo: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
^  Call: (14) not(atom(["a", "b"]))
^  Unify: (14) not(user:atom(["a", "b"]))
^  Exit: (14) not(user:atom(["a", "b"]))
   Call: (14) length(["a", "b"], _G5661)
   Unify: (14) length(["a", "b"], _G5661)
   Exit: (14) length(["a", "b"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["a", "b"])
   Unify: (14) expressionnotatom2(["a", "b"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2(["b"])
   Unify: (15) expressionnotatom2(["b"])
   Call: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) var("b")
   Fail: (17) var("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) isvalstrempty("b")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["b"])
   Exit: (14) expressionnotatom2(["a", "b"])
   Exit: (13) expressionnotatom(["a", "b"])
   Call: (13) [[v, b], [v, d]]=[_G5653|_G5654]
   Exit: (13) [[v, b], [v, d]]=[[v, b], [v, d]]
^  Call: (13) not(var([v, b]))
^  Unify: (13) not(user:var([v, b]))
^  Exit: (13) not(user:var([v, b]))
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) putvalue([v, b], ["a", "b"], [[[v, c], ["a", "b"]]], _G5671)
   Unify: (13) putvalue([v, b], ["a", "b"], [[[v, c], ["a", "b"]]], _G5671)
^  Call: (14) not(isvar([v, b]))
^  Unify: (14) not(user:isvar([v, b]))
   Call: (15) isvar([v, b])
   Unify: (15) isvar([v, b])
   Exit: (15) isvar([v, b])
^  Fail: (14) not(user:isvar([v, b]))
   Redo: (13) putvalue([v, b], ["a", "b"], [[[v, c], ["a", "b"]]], _G5671)
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
   Call: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
^  Call: (15) not(var(["a", "b"]))
^  Unify: (15) not(user:var(["a", "b"]))
^  Exit: (15) not(user:var(["a", "b"]))
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
^  Call: (15) not(var(["a", "b"]))
^  Unify: (15) not(user:var(["a", "b"]))
^  Exit: (15) not(user:var(["a", "b"]))
   Call: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) isval(["a", "b"])
   Unify: (16) isval(["a", "b"])
   Call: (17) number(["a", "b"])
   Fail: (17) number(["a", "b"])
   Fail: (16) isval(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) string(["a", "b"])
   Fail: (16) string(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) atom(["a", "b"])
   Fail: (16) atom(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
^  Call: (16) not(atom(["a", "b"]))
^  Unify: (16) not(user:atom(["a", "b"]))
^  Exit: (16) not(user:atom(["a", "b"]))
   Call: (16) length(["a", "b"], _G5679)
   Unify: (16) length(["a", "b"], _G5679)
   Exit: (16) length(["a", "b"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["a", "b"])
   Unify: (16) expression2(["a", "b"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2(["b"])
   Unify: (17) expression2(["b"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["b"])
   Exit: (16) expression2(["a", "b"])
   Exit: (15) expression(["a", "b"])
   Exit: (14) isvalstrorundef(["a", "b"])
   Call: (14) updatevar([v, b], ["a", "b"], [[[v, c], ["a", "b"]]], _G5681)
   Unify: (14) updatevar([v, b], ["a", "b"], [[[v, c], ["a", "b"]]], _G5681)
   Call: (15) lists:member([[v, b], empty], [[[v, c], ["a", "b"]]])
   Unify: (15) lists:member([[v, b], empty], [[[v, c], ["a", "b"]]])
   Fail: (15) lists:member([[v, b], empty], [[[v, c], ["a", "b"]]])
   Redo: (14) updatevar([v, b], ["a", "b"], [[[v, c], ["a", "b"]]], _G5681)
^  Call: (15) not(member([[v, b], _G5677], [[[v, c], ["a", "b"]]]))
^  Unify: (15) not(user:member([[v, b], _G5677], [[[v, c], ["a", "b"]]]))
^  Exit: (15) not(user:member([[v, b], _G5677], [[[v, c], ["a", "b"]]]))
   Call: (15) _G5677=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, c], ["a", "b"]]], [[[v, b], ["a", "b"]]], _G5701)
   Unify: (15) lists:append([[[v, c], ["a", "b"]]], [[[v, b], ["a", "b"]]], [[[v, c], ["a", "b"]]|_G5693])
   Exit: (15) lists:append([[[v, c], ["a", "b"]]], [[[v, b], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, b], ["a", "b"], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Exit: (13) putvalue([v, b], ["a", "b"], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5711)
   Unify: (15) length([v, d], _G5711)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5719)
   Unify: (15) length([v, d], _G5719)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5719, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Unify: (14) getvalue([v, d], _G5719, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5719, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5718)
   Unify: (15) isvalstrorundef(_G5718)
   Call: (16) var(_G5718)
   Exit: (16) var(_G5718)
   Exit: (15) isvalstrorundef(_G5718)
   Call: (15) getvar([v, d], _G5719, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Unify: (15) getvar([v, d], _G5719, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Call: (16) lists:member([[v, d], _G5714], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Unify: (16) lists:member([[v, d], _G5714], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Fail: (16) lists:member([[v, d], _G5714], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Redo: (15) getvar([v, d], _G5719, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Unify: (15) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
^  Call: (16) not(member([[v, d], _G5717], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]]))
^  Unify: (16) not(user:member([[v, d], _G5717], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]]))
^  Exit: (16) not(user:member([[v, d], _G5717], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5733)
   Unify: (14) putvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5733)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5733)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5738)
   Unify: (15) updatevar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5738)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], _G5738)
^  Call: (16) not(member([[v, d], _G5734], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]]))
^  Unify: (16) not(user:member([[v, d], _G5734], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]]))
^  Exit: (16) not(user:member([[v, d], _G5734], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]]))
   Call: (16) _G5734=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, d], empty]], _G5758)
   Unify: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, d], empty]], [[[v, c], ["a", "b"]]|_G5750])
   Exit: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5773)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[v, d], [v, d]]], _G5776)
   Unify: (14) checkarguments([], [], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["a", "b"], [v, d]], [[v, b], [v, d]], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["a", "b"], ["a", "b"], [v, d]], [[v, c], [v, b], [v, d]], [], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5781]]|_G5773]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5781]]|_G5773]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[_G5775], or, [_G5784]]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[_G5775], or, [_G5784]]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5773]]|_G5765]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5773]]|_G5765]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5767], or, [_G5776]]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5767], or, [_G5776]]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5783, _G5784, _G5785)
   Unify: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5783, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5783)
   Unify: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5783)
   Call: (14) getvalues([v, d], [v, c], _G5781, _G5782, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, c], _G5781, _G5782, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5780, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5780, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5780, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5779)
   Unify: (16) isvalstrorundef(_G5779)
   Call: (17) var(_G5779)
   Exit: (17) var(_G5779)
   Exit: (16) isvalstrorundef(_G5779)
   Call: (16) getvar([v, d], _G5780, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5780, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5775], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5775], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5780, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5778], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5778], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5778], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (15) getvalue([v, c], _G5786, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (15) getvalue([v, c], _G5786, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, c]))
^  Unify: (16) not(user:isvar([v, c]))
   Call: (17) isvar([v, c])
   Unify: (17) isvar([v, c])
   Exit: (17) isvar([v, c])
^  Fail: (16) not(user:isvar([v, c]))
   Redo: (15) getvalue([v, c], _G5786, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (16) isvar([v, c])
   Unify: (16) isvar([v, c])
   Exit: (16) isvar([v, c])
   Call: (16) isvalstrorundef(_G5785)
   Unify: (16) isvalstrorundef(_G5785)
   Call: (17) var(_G5785)
   Exit: (17) var(_G5785)
   Exit: (16) isvalstrorundef(_G5785)
   Call: (16) getvar([v, c], _G5786, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, c], _G5786, [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, c], _G5781], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, c], _G5781], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, c], ["a", "b"]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(["a", "b"]=empty)
^  Unify: (17) not(user: (["a", "b"]=empty))
^  Exit: (17) not(user: (["a", "b"]=empty))
   Exit: (16) getvar([v, c], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (15) getvalue([v, c], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, c], empty, ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) atom(["a", "b"])
   Fail: (15) atom(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
^  Call: (15) not(atom(["a", "b"]))
^  Unify: (15) not(user:atom(["a", "b"]))
^  Exit: (15) not(user:atom(["a", "b"]))
   Call: (15) length(["a", "b"], _G5803)
   Unify: (15) length(["a", "b"], _G5803)
   Exit: (15) length(["a", "b"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["a", "b"])
   Unify: (15) expression2(["a", "b"])
   Call: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) expression3("a")
   Call: (16) expression2(["b"])
   Unify: (16) expression2(["b"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["b"])
   Exit: (15) expression2(["a", "b"])
   Exit: (14) expression(["a", "b"])
   Call: (14) val1emptyorvalsequal(empty, ["a", "b"])
   Unify: (14) val1emptyorvalsequal(empty, ["a", "b"])
   Exit: (14) val1emptyorvalsequal(empty, ["a", "b"])
   Call: (14) putvalue([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5805)
   Unify: (14) putvalue([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5805)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5805)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["a", "b"])
   Unify: (15) isvalstrorundef(["a", "b"])
   Call: (16) var(["a", "b"])
   Fail: (16) var(["a", "b"])
   Redo: (15) isvalstrorundef(["a", "b"])
   Unify: (15) isvalstrorundef(["a", "b"])
^  Call: (16) not(var(["a", "b"]))
^  Unify: (16) not(user:var(["a", "b"]))
^  Exit: (16) not(user:var(["a", "b"]))
   Call: (16) isval(["a", "b"])
   Unify: (16) isval(["a", "b"])
   Call: (17) number(["a", "b"])
   Fail: (17) number(["a", "b"])
   Fail: (16) isval(["a", "b"])
   Redo: (15) isvalstrorundef(["a", "b"])
   Unify: (15) isvalstrorundef(["a", "b"])
^  Call: (16) not(var(["a", "b"]))
^  Unify: (16) not(user:var(["a", "b"]))
^  Exit: (16) not(user:var(["a", "b"]))
   Call: (16) expression(["a", "b"])
   Unify: (16) expression(["a", "b"])
   Call: (17) isval(["a", "b"])
   Unify: (17) isval(["a", "b"])
   Call: (18) number(["a", "b"])
   Fail: (18) number(["a", "b"])
   Fail: (17) isval(["a", "b"])
   Redo: (16) expression(["a", "b"])
   Unify: (16) expression(["a", "b"])
   Call: (17) string(["a", "b"])
   Fail: (17) string(["a", "b"])
   Redo: (16) expression(["a", "b"])
   Unify: (16) expression(["a", "b"])
   Call: (17) atom(["a", "b"])
   Fail: (17) atom(["a", "b"])
   Redo: (16) expression(["a", "b"])
   Unify: (16) expression(["a", "b"])
^  Call: (17) not(atom(["a", "b"]))
^  Unify: (17) not(user:atom(["a", "b"]))
^  Exit: (17) not(user:atom(["a", "b"]))
   Call: (17) length(["a", "b"], _G5813)
   Unify: (17) length(["a", "b"], _G5813)
   Exit: (17) length(["a", "b"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["a", "b"])
   Unify: (17) expression2(["a", "b"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2(["b"])
   Unify: (18) expression2(["b"])
   Call: (19) expression3("b")
   Unify: (19) expression3("b")
   Call: (20) isval("b")
   Unify: (20) isval("b")
   Call: (21) number("b")
   Fail: (21) number("b")
   Fail: (20) isval("b")
   Redo: (19) expression3("b")
   Unify: (19) expression3("b")
   Call: (20) string("b")
   Exit: (20) string("b")
   Exit: (19) expression3("b")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["b"])
   Exit: (17) expression2(["a", "b"])
   Exit: (16) expression(["a", "b"])
   Exit: (15) isvalstrorundef(["a", "b"])
   Call: (15) updatevar([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5815)
   Unify: (15) updatevar([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5815)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Unify: (16) lists:delete([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Exit: (16) lists:delete([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]])
   Call: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, d], ["a", "b"]]], _G5841)
   Unify: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, d], ["a", "b"]]], [[[v, c], ["a", "b"]]|_G5833])
   Exit: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["a", "b"]]], [[[v, d], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Exit: (14) putvalue([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5851=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], _G5854, [], _G5856)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [[[n, =], [[v, d], [v, c]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [], _G5854)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [], _G5854)
   Call: (12) [[[v, d], [v, d]]]=[[_G5847, _G5850]|_G5845]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5866)
   Unify: (13) length([v, d], _G5866)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [], _G5863)
   Call: (12) lists:member([[v, d], _G5856], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Unify: (12) lists:member([[v, d], _G5856], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Exit: (12) lists:member([[v, d], ["a", "b"]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]])
   Call: (12) lists:append([], [[[v, d], ["a", "b"]]], _G5877)
   Unify: (12) lists:append([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (12) lists:append([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Call: (12) updatevars([], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]], _G5878)
   Unify: (12) updatevars([], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (12) updatevars([], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["a", "b"]], [[v, b], ["a", "b"]], [[v, d], ["a", "b"]]], [], [[[v, d], ["a", "b"]]])
^  Call: (11) not([[[v, d], ["a", "b"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["a", "b"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["a", "b"]]]=[]))
   Call: (11) unique1([[[v, d], ["a", "b"]]], [], _G14)
   Unify: (11) unique1([[[v, d], ["a", "b"]]], [], _G14)
   Call: (12) lists:delete([], [[v, d], ["a", "b"]], _G5883)
   Unify: (12) lists:delete([], [[v, d], ["a", "b"]], [])
   Exit: (12) lists:delete([], [[v, d], ["a", "b"]], [])
   Call: (12) lists:append([], [[[v, d], ["a", "b"]]], _G5886)
   Unify: (12) lists:append([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (12) lists:append([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Call: (12) unique1([], [[[v, d], ["a", "b"]]], _G14)
   Unify: (12) unique1([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (12) unique1([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (11) unique1([[[v, d], ["a", "b"]]], [], [[[v, d], ["a", "b"]]])
   Call: (11) findresult3([["a", "b"], ["a", "b"], [v, d]], [[[v, d], ["a", "b"]]], [], _G5887)
   Unify: (11) findresult3([["a", "b"], ["a", "b"], [v, d]], [[[v, d], ["a", "b"]]], [], _G5887)
   Call: (12) [["a", "b"], ["a", "b"], [v, d]]=[_G5877|_G5878]
   Exit: (12) [["a", "b"], ["a", "b"], [v, d]]=[["a", "b"], ["a", "b"], [v, d]]
   Call: (12) expressionnotatom(["a", "b"])
   Unify: (12) expressionnotatom(["a", "b"])
   Call: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) var(["a", "b"])
   Fail: (14) var(["a", "b"])
   Redo: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) isval(["a", "b"])
   Unify: (14) isval(["a", "b"])
   Call: (15) number(["a", "b"])
   Fail: (15) number(["a", "b"])
   Fail: (14) isval(["a", "b"])
   Redo: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) string(["a", "b"])
   Fail: (14) string(["a", "b"])
   Fail: (13) isvalstrempty(["a", "b"])
   Redo: (12) expressionnotatom(["a", "b"])
   Unify: (12) expressionnotatom(["a", "b"])
^  Call: (13) not(atom(["a", "b"]))
^  Unify: (13) not(user:atom(["a", "b"]))
^  Exit: (13) not(user:atom(["a", "b"]))
   Call: (13) length(["a", "b"], _G5893)
   Unify: (13) length(["a", "b"], _G5893)
   Exit: (13) length(["a", "b"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["a", "b"])
   Unify: (13) expressionnotatom2(["a", "b"])
   Call: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) var("a")
   Fail: (15) var("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) isval("a")
   Unify: (15) isval("a")
   Call: (16) number("a")
   Fail: (16) number("a")
   Fail: (15) isval("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) string("a")
   Exit: (15) string("a")
   Exit: (14) isvalstrempty("a")
   Call: (14) expressionnotatom2(["b"])
   Unify: (14) expressionnotatom2(["b"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["b"])
   Exit: (13) expressionnotatom2(["a", "b"])
   Exit: (12) expressionnotatom(["a", "b"])
   Call: (12) lists:append([], [["a", "b"]], _G5897)
   Unify: (12) lists:append([], [["a", "b"]], [["a", "b"]])
   Exit: (12) lists:append([], [["a", "b"]], [["a", "b"]])
   Call: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["a", "b"]]], [["a", "b"]], _G5898)
   Unify: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["a", "b"]]], [["a", "b"]], _G5898)
   Call: (13) [["a", "b"], [v, d]]=[_G5888|_G5889]
   Exit: (13) [["a", "b"], [v, d]]=[["a", "b"], [v, d]]
   Call: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
   Call: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Fail: (14) isvalstrempty(["a", "b"])
   Redo: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
^  Call: (14) not(atom(["a", "b"]))
^  Unify: (14) not(user:atom(["a", "b"]))
^  Exit: (14) not(user:atom(["a", "b"]))
   Call: (14) length(["a", "b"], _G5904)
   Unify: (14) length(["a", "b"], _G5904)
   Exit: (14) length(["a", "b"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["a", "b"])
   Unify: (14) expressionnotatom2(["a", "b"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2(["b"])
   Unify: (15) expressionnotatom2(["b"])
   Call: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) var("b")
   Fail: (17) var("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) isvalstrempty("b")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["b"])
   Exit: (14) expressionnotatom2(["a", "b"])
   Exit: (13) expressionnotatom(["a", "b"])
   Call: (13) lists:append([["a", "b"]], [["a", "b"]], _G5908)
   Unify: (13) lists:append([["a", "b"]], [["a", "b"]], [["a", "b"]|_G5900])
   Exit: (13) lists:append([["a", "b"]], [["a", "b"]], [["a", "b"], ["a", "b"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["a", "b"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["a", "b"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5918)
   Unify: (15) length([v, d], _G5918)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["a", "b"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["a", "b"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5908], [[[v, d], ["a", "b"]]])
   Unify: (14) lists:member([[v, d], _G5908], [[[v, d], ["a", "b"]]])
   Exit: (14) lists:member([[v, d], ["a", "b"]], [[[v, d], ["a", "b"]]])
   Call: (14) lists:append([["a", "b"], ["a", "b"]], [["a", "b"]], _G5923)
   Unify: (14) lists:append([["a", "b"], ["a", "b"]], [["a", "b"]], [["a", "b"]|_G5915])
   Exit: (14) lists:append([["a", "b"], ["a", "b"]], [["a", "b"]], [["a", "b"], ["a", "b"], ["a", "b"]])
   Call: (14) findresult3([], [[[v, d], ["a", "b"]]], [["a", "b"], ["a", "b"], ["a", "b"]], _G5930)
   Unify: (14) findresult3([], [[[v, d], ["a", "b"]]], [["a", "b"], ["a", "b"], ["a", "b"]], [["a", "b"], ["a", "b"], ["a", "b"]])
   Exit: (14) findresult3([], [[[v, d], ["a", "b"]]], [["a", "b"], ["a", "b"], ["a", "b"]], [["a", "b"], ["a", "b"], ["a", "b"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["a", "b"]], [["a", "b"], ["a", "b"], ["a", "b"]])
   Exit: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["a", "b"]]], [["a", "b"]], [["a", "b"], ["a", "b"], ["a", "b"]])
   Exit: (11) findresult3([["a", "b"], ["a", "b"], [v, d]], [[[v, d], ["a", "b"]]], [], [["a", "b"], ["a", "b"], ["a", "b"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "b"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "b"]]])
   Exit: (9) interpret1(off, [[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "b"]]])
   Exit: (8) interpret(off, [[n, f], [["a", "b"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "b"]]])

   Call: (8) interpret(off, [[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (8) interpret(off, [[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5516)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5516)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5516, [], _G5518)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5516, [], _G5518)
   Call: (11) [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5507|_G5508]
   Exit: (11) [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5516], _G5519, "->", _G5528]
   Fail: (11) [[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5516], _G5519, "->", _G5528]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5519, [], _G5521)
   Call: (11) [[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5516], "->", _G5525]
   Fail: (11) [[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5516], "->", _G5525]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5516, [], _G5518)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5516, [], _G5518)
   Call: (11) [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5507|_G5508]
   Exit: (11) [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5510, _G5513, ":-", _G5522]
   Exit: (11) [[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]], _G5537)
   Unify: (11) lists:append([], [[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5537, [], _G5539)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]], [], _G5537)
   Unify: (10) lists:append([[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]|_G5529])
   Exit: (10) lists:append([[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, b], [v, c], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (9) interpret1(off, [[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
^  Call: (10) retractall(debug(_G5531))
^  Exit: (10) retractall(debug(_G5531))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5535))
^  Exit: (10) retractall(cut(_G5535))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (10) member1([[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["c", "a"], ["b", "a"], [v, d]]]=[_G5539, _G5542]
   Exit: (11) [[n, f], [["c", "a"], ["b", "a"], [v, d]]]=[[n, f], [["c", "a"], ["b", "a"], [v, d]]]
   Call: (11) [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5551, ":-", _G5560]|_G5546]
   Exit: (11) [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["c", "a"], ["b", "a"], [v, d]], _G5571)
   Unify: (11) length([["c", "a"], ["b", "a"], [v, d]], _G5571)
   Exit: (11) length([["c", "a"], ["b", "a"], [v, d]], 3)
   Call: (11) length([[v, b], [v, c], [v, d]], 3)
   Unify: (11) length([[v, b], [v, c], [v, d]], 3)
   Unify: (11) length([[v, b], [v, c], [v, d]], 3)
   Exit: (11) length([[v, b], [v, c], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) checkarguments([["c", "a"], ["b", "a"], [v, d]], [[v, b], [v, c], [v, d]], [], _G5573, [], _G5575)
   Unify: (11) checkarguments([["c", "a"], ["b", "a"], [v, d]], [[v, b], [v, c], [v, d]], [], _G5573, [], _G5575)
   Call: (12) [["c", "a"], ["b", "a"], [v, d]]=[_G5563|_G5564]
   Exit: (12) [["c", "a"], ["b", "a"], [v, d]]=[["c", "a"], ["b", "a"], [v, d]]
   Call: (12) expressionnotatom(["c", "a"])
   Unify: (12) expressionnotatom(["c", "a"])
   Call: (13) isvalstrempty(["c", "a"])
   Unify: (13) isvalstrempty(["c", "a"])
   Call: (14) var(["c", "a"])
   Fail: (14) var(["c", "a"])
   Redo: (13) isvalstrempty(["c", "a"])
   Unify: (13) isvalstrempty(["c", "a"])
   Call: (14) isval(["c", "a"])
   Unify: (14) isval(["c", "a"])
   Call: (15) number(["c", "a"])
   Fail: (15) number(["c", "a"])
   Fail: (14) isval(["c", "a"])
   Redo: (13) isvalstrempty(["c", "a"])
   Unify: (13) isvalstrempty(["c", "a"])
   Call: (14) string(["c", "a"])
   Fail: (14) string(["c", "a"])
   Fail: (13) isvalstrempty(["c", "a"])
   Redo: (12) expressionnotatom(["c", "a"])
   Unify: (12) expressionnotatom(["c", "a"])
^  Call: (13) not(atom(["c", "a"]))
^  Unify: (13) not(user:atom(["c", "a"]))
^  Exit: (13) not(user:atom(["c", "a"]))
   Call: (13) length(["c", "a"], _G5579)
   Unify: (13) length(["c", "a"], _G5579)
   Exit: (13) length(["c", "a"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["c", "a"])
   Unify: (13) expressionnotatom2(["c", "a"])
   Call: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) var("c")
   Fail: (15) var("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) isval("c")
   Unify: (15) isval("c")
   Call: (16) number("c")
   Fail: (16) number("c")
   Fail: (15) isval("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) string("c")
   Exit: (15) string("c")
   Exit: (14) isvalstrempty("c")
   Call: (14) expressionnotatom2(["a"])
   Unify: (14) expressionnotatom2(["a"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["a"])
   Exit: (13) expressionnotatom2(["c", "a"])
   Exit: (12) expressionnotatom(["c", "a"])
   Call: (12) [[v, b], [v, c], [v, d]]=[_G5571|_G5572]
   Exit: (12) [[v, b], [v, c], [v, d]]=[[v, b], [v, c], [v, d]]
^  Call: (12) not(var([v, b]))
^  Unify: (12) not(user:var([v, b]))
^  Exit: (12) not(user:var([v, b]))
   Call: (12) isvar([v, b])
   Unify: (12) isvar([v, b])
   Exit: (12) isvar([v, b])
   Call: (12) putvalue([v, b], ["c", "a"], [], _G5589)
   Unify: (12) putvalue([v, b], ["c", "a"], [], _G5589)
^  Call: (13) not(isvar([v, b]))
^  Unify: (13) not(user:isvar([v, b]))
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
^  Fail: (13) not(user:isvar([v, b]))
   Redo: (12) putvalue([v, b], ["c", "a"], [], _G5589)
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) isvalstrorundef(["c", "a"])
   Unify: (13) isvalstrorundef(["c", "a"])
   Call: (14) var(["c", "a"])
   Fail: (14) var(["c", "a"])
   Redo: (13) isvalstrorundef(["c", "a"])
   Unify: (13) isvalstrorundef(["c", "a"])
^  Call: (14) not(var(["c", "a"]))
^  Unify: (14) not(user:var(["c", "a"]))
^  Exit: (14) not(user:var(["c", "a"]))
   Call: (14) isval(["c", "a"])
   Unify: (14) isval(["c", "a"])
   Call: (15) number(["c", "a"])
   Fail: (15) number(["c", "a"])
   Fail: (14) isval(["c", "a"])
   Redo: (13) isvalstrorundef(["c", "a"])
   Unify: (13) isvalstrorundef(["c", "a"])
^  Call: (14) not(var(["c", "a"]))
^  Unify: (14) not(user:var(["c", "a"]))
^  Exit: (14) not(user:var(["c", "a"]))
   Call: (14) expression(["c", "a"])
   Unify: (14) expression(["c", "a"])
   Call: (15) isval(["c", "a"])
   Unify: (15) isval(["c", "a"])
   Call: (16) number(["c", "a"])
   Fail: (16) number(["c", "a"])
   Fail: (15) isval(["c", "a"])
   Redo: (14) expression(["c", "a"])
   Unify: (14) expression(["c", "a"])
   Call: (15) string(["c", "a"])
   Fail: (15) string(["c", "a"])
   Redo: (14) expression(["c", "a"])
   Unify: (14) expression(["c", "a"])
   Call: (15) atom(["c", "a"])
   Fail: (15) atom(["c", "a"])
   Redo: (14) expression(["c", "a"])
   Unify: (14) expression(["c", "a"])
^  Call: (15) not(atom(["c", "a"]))
^  Unify: (15) not(user:atom(["c", "a"]))
^  Exit: (15) not(user:atom(["c", "a"]))
   Call: (15) length(["c", "a"], _G5597)
   Unify: (15) length(["c", "a"], _G5597)
   Exit: (15) length(["c", "a"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["c", "a"])
   Unify: (15) expression2(["c", "a"])
   Call: (16) expression3("c")
   Unify: (16) expression3("c")
   Call: (17) isval("c")
   Unify: (17) isval("c")
   Call: (18) number("c")
   Fail: (18) number("c")
   Fail: (17) isval("c")
   Redo: (16) expression3("c")
   Unify: (16) expression3("c")
   Call: (17) string("c")
   Exit: (17) string("c")
   Exit: (16) expression3("c")
   Call: (16) expression2(["a"])
   Unify: (16) expression2(["a"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["a"])
   Exit: (15) expression2(["c", "a"])
   Exit: (14) expression(["c", "a"])
   Exit: (13) isvalstrorundef(["c", "a"])
   Call: (13) updatevar([v, b], ["c", "a"], [], _G5599)
   Unify: (13) updatevar([v, b], ["c", "a"], [], _G5599)
   Call: (14) lists:member([[v, b], empty], [])
   Fail: (14) lists:member([[v, b], empty], [])
   Redo: (13) updatevar([v, b], ["c", "a"], [], _G5599)
^  Call: (14) not(member([[v, b], _G5595], []))
^  Unify: (14) not(user:member([[v, b], _G5595], []))
^  Exit: (14) not(user:member([[v, b], _G5595], []))
   Call: (14) _G5595=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, b], ["c", "a"]]], _G5619)
   Unify: (14) lists:append([], [[[v, b], ["c", "a"]]], [[[v, b], ["c", "a"]]])
   Exit: (14) lists:append([], [[[v, b], ["c", "a"]]], [[[v, b], ["c", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, b], ["c", "a"], [], [[[v, b], ["c", "a"]]])
   Exit: (12) putvalue([v, b], ["c", "a"], [], [[[v, b], ["c", "a"]]])
   Call: (12) checkarguments([["b", "a"], [v, d]], [[v, c], [v, d]], [[[v, b], ["c", "a"]]], _G5620, [], _G5622)
   Unify: (12) checkarguments([["b", "a"], [v, d]], [[v, c], [v, d]], [[[v, b], ["c", "a"]]], _G5620, [], _G5622)
   Call: (13) [["b", "a"], [v, d]]=[_G5610|_G5611]
   Exit: (13) [["b", "a"], [v, d]]=[["b", "a"], [v, d]]
   Call: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
   Call: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Fail: (14) isvalstrempty(["b", "a"])
   Redo: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
^  Call: (14) not(atom(["b", "a"]))
^  Unify: (14) not(user:atom(["b", "a"]))
^  Exit: (14) not(user:atom(["b", "a"]))
   Call: (14) length(["b", "a"], _G5626)
   Unify: (14) length(["b", "a"], _G5626)
   Exit: (14) length(["b", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "a"])
   Unify: (14) expressionnotatom2(["b", "a"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["b", "a"])
   Exit: (13) expressionnotatom(["b", "a"])
   Call: (13) [[v, c], [v, d]]=[_G5618|_G5619]
   Exit: (13) [[v, c], [v, d]]=[[v, c], [v, d]]
^  Call: (13) not(var([v, c]))
^  Unify: (13) not(user:var([v, c]))
^  Exit: (13) not(user:var([v, c]))
   Call: (13) isvar([v, c])
   Unify: (13) isvar([v, c])
   Exit: (13) isvar([v, c])
   Call: (13) putvalue([v, c], ["b", "a"], [[[v, b], ["c", "a"]]], _G5636)
   Unify: (13) putvalue([v, c], ["b", "a"], [[[v, b], ["c", "a"]]], _G5636)
^  Call: (14) not(isvar([v, c]))
^  Unify: (14) not(user:isvar([v, c]))
   Call: (15) isvar([v, c])
   Unify: (15) isvar([v, c])
   Exit: (15) isvar([v, c])
^  Fail: (14) not(user:isvar([v, c]))
   Redo: (13) putvalue([v, c], ["b", "a"], [[[v, b], ["c", "a"]]], _G5636)
   Call: (14) isvar([v, c])
   Unify: (14) isvar([v, c])
   Exit: (14) isvar([v, c])
   Call: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
^  Call: (15) not(var(["b", "a"]))
^  Unify: (15) not(user:var(["b", "a"]))
^  Exit: (15) not(user:var(["b", "a"]))
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
^  Call: (15) not(var(["b", "a"]))
^  Unify: (15) not(user:var(["b", "a"]))
^  Exit: (15) not(user:var(["b", "a"]))
   Call: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) isval(["b", "a"])
   Unify: (16) isval(["b", "a"])
   Call: (17) number(["b", "a"])
   Fail: (17) number(["b", "a"])
   Fail: (16) isval(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) string(["b", "a"])
   Fail: (16) string(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) atom(["b", "a"])
   Fail: (16) atom(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
^  Call: (16) not(atom(["b", "a"]))
^  Unify: (16) not(user:atom(["b", "a"]))
^  Exit: (16) not(user:atom(["b", "a"]))
   Call: (16) length(["b", "a"], _G5644)
   Unify: (16) length(["b", "a"], _G5644)
   Exit: (16) length(["b", "a"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["b", "a"])
   Unify: (16) expression2(["b", "a"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2(["a"])
   Unify: (17) expression2(["a"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["a"])
   Exit: (16) expression2(["b", "a"])
   Exit: (15) expression(["b", "a"])
   Exit: (14) isvalstrorundef(["b", "a"])
   Call: (14) updatevar([v, c], ["b", "a"], [[[v, b], ["c", "a"]]], _G5646)
   Unify: (14) updatevar([v, c], ["b", "a"], [[[v, b], ["c", "a"]]], _G5646)
   Call: (15) lists:member([[v, c], empty], [[[v, b], ["c", "a"]]])
   Unify: (15) lists:member([[v, c], empty], [[[v, b], ["c", "a"]]])
   Fail: (15) lists:member([[v, c], empty], [[[v, b], ["c", "a"]]])
   Redo: (14) updatevar([v, c], ["b", "a"], [[[v, b], ["c", "a"]]], _G5646)
^  Call: (15) not(member([[v, c], _G5642], [[[v, b], ["c", "a"]]]))
^  Unify: (15) not(user:member([[v, c], _G5642], [[[v, b], ["c", "a"]]]))
^  Exit: (15) not(user:member([[v, c], _G5642], [[[v, b], ["c", "a"]]]))
   Call: (15) _G5642=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, b], ["c", "a"]]], [[[v, c], ["b", "a"]]], _G5666)
   Unify: (15) lists:append([[[v, b], ["c", "a"]]], [[[v, c], ["b", "a"]]], [[[v, b], ["c", "a"]]|_G5658])
   Exit: (15) lists:append([[[v, b], ["c", "a"]]], [[[v, c], ["b", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, c], ["b", "a"], [[[v, b], ["c", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Exit: (13) putvalue([v, c], ["b", "a"], [[[v, b], ["c", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5670, [], _G5672)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5670, [], _G5672)
   Call: (14) [[v, d]]=[_G5660|_G5661]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5676)
   Unify: (15) length([v, d], _G5676)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5670, [], _G5672)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5670, [], _G5672)
   Call: (14) [[v, d]]=[_G5660|_G5661]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5668|_G5669]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5684)
   Unify: (15) length([v, d], _G5684)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5670, [], _G5672)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5670, [], _G5672)
   Call: (14) [[v, d]]=[_G5660|_G5661]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5668|_G5669]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5684, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Unify: (14) getvalue([v, d], _G5684, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5684, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5683)
   Unify: (15) isvalstrorundef(_G5683)
   Call: (16) var(_G5683)
   Exit: (16) var(_G5683)
   Exit: (15) isvalstrorundef(_G5683)
   Call: (15) getvar([v, d], _G5684, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Unify: (15) getvar([v, d], _G5684, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Call: (16) lists:member([[v, d], _G5679], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Unify: (16) lists:member([[v, d], _G5679], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Fail: (16) lists:member([[v, d], _G5679], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Redo: (15) getvar([v, d], _G5684, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Unify: (15) getvar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
^  Call: (16) not(member([[v, d], _G5682], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5682], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5682], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5698)
   Unify: (14) putvalue([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5698)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5698)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5703)
   Unify: (15) updatevar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5703)
   Call: (16) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], _G5703)
^  Call: (16) not(member([[v, d], _G5699], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5699], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5699], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]]))
   Call: (16) _G5699=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, d], empty]], _G5723)
   Unify: (16) lists:append([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, d], empty]], [[[v, b], ["c", "a"]]|_G5715])
   Exit: (16) lists:append([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5738)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[v, d], [v, d]]], _G5741)
   Unify: (14) checkarguments([], [], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["b", "a"], [v, d]], [[v, c], [v, d]], [[[v, b], ["c", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["c", "a"], ["b", "a"], [v, d]], [[v, b], [v, c], [v, d]], [], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5729|_G5730]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5737|_G5738]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5746]]|_G5738]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5746]]|_G5738]
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[_G5740], or, [_G5749]]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[_G5740], or, [_G5749]]
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5737|_G5738]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5747, [[n, =], [[v, d], [v, c]]], _G5749)
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5738]]|_G5730]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5738]]|_G5730]
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5732], or, [_G5741]]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5732], or, [_G5741]]
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5739, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5729|_G5730]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5748, _G5749, _G5750)
   Unify: (12) interpretstatement1([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5748, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, c], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5748)
   Unify: (13) interpretpart(is, [v, d], [v, c], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5748)
   Call: (14) getvalues([v, d], [v, c], _G5746, _G5747, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, c], _G5746, _G5747, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5745, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5745, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5745, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5744)
   Unify: (16) isvalstrorundef(_G5744)
   Call: (17) var(_G5744)
   Exit: (17) var(_G5744)
   Exit: (16) isvalstrorundef(_G5744)
   Call: (16) getvar([v, d], _G5745, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5745, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5740], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5740], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5745, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5743], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5743], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5743], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, c], _G5751, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, c], _G5751, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, c]))
^  Unify: (16) not(user:isvar([v, c]))
   Call: (17) isvar([v, c])
   Unify: (17) isvar([v, c])
   Exit: (17) isvar([v, c])
^  Fail: (16) not(user:isvar([v, c]))
   Redo: (15) getvalue([v, c], _G5751, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, c])
   Unify: (16) isvar([v, c])
   Exit: (16) isvar([v, c])
   Call: (16) isvalstrorundef(_G5750)
   Unify: (16) isvalstrorundef(_G5750)
   Call: (17) var(_G5750)
   Exit: (17) var(_G5750)
   Exit: (16) isvalstrorundef(_G5750)
   Call: (16) getvar([v, c], _G5751, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, c], _G5751, [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, c], _G5746], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, c], _G5746], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, c], ["b", "a"]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(["b", "a"]=empty)
^  Unify: (17) not(user: (["b", "a"]=empty))
^  Exit: (17) not(user: (["b", "a"]=empty))
   Exit: (16) getvar([v, c], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, c], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, c], empty, ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) atom(["b", "a"])
   Fail: (15) atom(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
^  Call: (15) not(atom(["b", "a"]))
^  Unify: (15) not(user:atom(["b", "a"]))
^  Exit: (15) not(user:atom(["b", "a"]))
   Call: (15) length(["b", "a"], _G5768)
   Unify: (15) length(["b", "a"], _G5768)
   Exit: (15) length(["b", "a"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "a"])
   Unify: (15) expression2(["b", "a"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["a"])
   Unify: (16) expression2(["a"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["a"])
   Exit: (15) expression2(["b", "a"])
   Exit: (14) expression(["b", "a"])
   Call: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Unify: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Exit: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Call: (14) putvalue([v, d], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5770)
   Unify: (14) putvalue([v, d], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5770)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5770)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
   Call: (16) var(["b", "a"])
   Fail: (16) var(["b", "a"])
   Redo: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
^  Call: (16) not(var(["b", "a"]))
^  Unify: (16) not(user:var(["b", "a"]))
^  Exit: (16) not(user:var(["b", "a"]))
   Call: (16) isval(["b", "a"])
   Unify: (16) isval(["b", "a"])
   Call: (17) number(["b", "a"])
   Fail: (17) number(["b", "a"])
   Fail: (16) isval(["b", "a"])
   Redo: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
^  Call: (16) not(var(["b", "a"]))
^  Unify: (16) not(user:var(["b", "a"]))
^  Exit: (16) not(user:var(["b", "a"]))
   Call: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) isval(["b", "a"])
   Unify: (17) isval(["b", "a"])
   Call: (18) number(["b", "a"])
   Fail: (18) number(["b", "a"])
   Fail: (17) isval(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) string(["b", "a"])
   Fail: (17) string(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) atom(["b", "a"])
   Fail: (17) atom(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
^  Call: (17) not(atom(["b", "a"]))
^  Unify: (17) not(user:atom(["b", "a"]))
^  Exit: (17) not(user:atom(["b", "a"]))
   Call: (17) length(["b", "a"], _G5778)
   Unify: (17) length(["b", "a"], _G5778)
   Exit: (17) length(["b", "a"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["b", "a"])
   Unify: (17) expression2(["b", "a"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2(["a"])
   Unify: (18) expression2(["a"])
   Call: (19) expression3("a")
   Unify: (19) expression3("a")
   Call: (20) isval("a")
   Unify: (20) isval("a")
   Call: (21) number("a")
   Fail: (21) number("a")
   Fail: (20) isval("a")
   Redo: (19) expression3("a")
   Unify: (19) expression3("a")
   Call: (20) string("a")
   Exit: (20) string("a")
   Exit: (19) expression3("a")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["a"])
   Exit: (17) expression2(["b", "a"])
   Exit: (16) expression(["b", "a"])
   Exit: (15) isvalstrorundef(["b", "a"])
   Call: (15) updatevar([v, d], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5780)
   Unify: (15) updatevar([v, d], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], _G5780)
   Call: (16) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[v, d], empty], _G5791)
   Unify: (16) lists:delete([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[v, d], empty], _G5791)
   Exit: (16) lists:delete([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[v, d], empty], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]])
   Call: (16) lists:append([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, d], ["b", "a"]]], _G5806)
   Unify: (16) lists:append([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, b], ["c", "a"]]|_G5798])
   Exit: (16) lists:append([[[v, b], ["c", "a"]], [[v, c], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (14) putvalue([v, d], ["b", "a"], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, c], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5816=[[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], _G5819, [], _G5821)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], empty]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [[[n, =], [[v, d], [v, c]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5819)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5819)
   Call: (12) [[[v, d], [v, d]]]=[[_G5812, _G5815]|_G5810]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5831)
   Unify: (13) length([v, d], _G5831)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5828)
   Call: (12) lists:member([[v, d], _G5821], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Unify: (12) lists:member([[v, d], _G5821], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (12) lists:member([[v, d], ["b", "a"]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (12) lists:append([], [[[v, d], ["b", "a"]]], _G5842)
   Unify: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Call: (12) updatevars([], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], _G5843)
   Unify: (12) updatevars([], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) updatevars([], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["c", "a"]], [[v, c], ["b", "a"]], [[v, d], ["b", "a"]]], [], [[[v, d], ["b", "a"]]])
^  Call: (11) not([[[v, d], ["b", "a"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["b", "a"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["b", "a"]]]=[]))
   Call: (11) unique1([[[v, d], ["b", "a"]]], [], _G14)
   Unify: (11) unique1([[[v, d], ["b", "a"]]], [], _G14)
   Call: (12) lists:delete([], [[v, d], ["b", "a"]], _G5848)
   Unify: (12) lists:delete([], [[v, d], ["b", "a"]], [])
   Exit: (12) lists:delete([], [[v, d], ["b", "a"]], [])
   Call: (12) lists:append([], [[[v, d], ["b", "a"]]], _G5851)
   Unify: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Call: (12) unique1([], [[[v, d], ["b", "a"]]], _G14)
   Unify: (12) unique1([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) unique1([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (11) unique1([[[v, d], ["b", "a"]]], [], [[[v, d], ["b", "a"]]])
   Call: (11) findresult3([["c", "a"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], _G5852)
   Unify: (11) findresult3([["c", "a"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], _G5852)
   Call: (12) [["c", "a"], ["b", "a"], [v, d]]=[_G5842|_G5843]
   Exit: (12) [["c", "a"], ["b", "a"], [v, d]]=[["c", "a"], ["b", "a"], [v, d]]
   Call: (12) expressionnotatom(["c", "a"])
   Unify: (12) expressionnotatom(["c", "a"])
   Call: (13) isvalstrempty(["c", "a"])
   Unify: (13) isvalstrempty(["c", "a"])
   Call: (14) var(["c", "a"])
   Fail: (14) var(["c", "a"])
   Redo: (13) isvalstrempty(["c", "a"])
   Unify: (13) isvalstrempty(["c", "a"])
   Call: (14) isval(["c", "a"])
   Unify: (14) isval(["c", "a"])
   Call: (15) number(["c", "a"])
   Fail: (15) number(["c", "a"])
   Fail: (14) isval(["c", "a"])
   Redo: (13) isvalstrempty(["c", "a"])
   Unify: (13) isvalstrempty(["c", "a"])
   Call: (14) string(["c", "a"])
   Fail: (14) string(["c", "a"])
   Fail: (13) isvalstrempty(["c", "a"])
   Redo: (12) expressionnotatom(["c", "a"])
   Unify: (12) expressionnotatom(["c", "a"])
^  Call: (13) not(atom(["c", "a"]))
^  Unify: (13) not(user:atom(["c", "a"]))
^  Exit: (13) not(user:atom(["c", "a"]))
   Call: (13) length(["c", "a"], _G5858)
   Unify: (13) length(["c", "a"], _G5858)
   Exit: (13) length(["c", "a"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["c", "a"])
   Unify: (13) expressionnotatom2(["c", "a"])
   Call: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) var("c")
   Fail: (15) var("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) isval("c")
   Unify: (15) isval("c")
   Call: (16) number("c")
   Fail: (16) number("c")
   Fail: (15) isval("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) string("c")
   Exit: (15) string("c")
   Exit: (14) isvalstrempty("c")
   Call: (14) expressionnotatom2(["a"])
   Unify: (14) expressionnotatom2(["a"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["a"])
   Exit: (13) expressionnotatom2(["c", "a"])
   Exit: (12) expressionnotatom(["c", "a"])
   Call: (12) lists:append([], [["c", "a"]], _G5862)
   Unify: (12) lists:append([], [["c", "a"]], [["c", "a"]])
   Exit: (12) lists:append([], [["c", "a"]], [["c", "a"]])
   Call: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["c", "a"]], _G5863)
   Unify: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["c", "a"]], _G5863)
   Call: (13) [["b", "a"], [v, d]]=[_G5853|_G5854]
   Exit: (13) [["b", "a"], [v, d]]=[["b", "a"], [v, d]]
   Call: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
   Call: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Fail: (14) isvalstrempty(["b", "a"])
   Redo: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
^  Call: (14) not(atom(["b", "a"]))
^  Unify: (14) not(user:atom(["b", "a"]))
^  Exit: (14) not(user:atom(["b", "a"]))
   Call: (14) length(["b", "a"], _G5869)
   Unify: (14) length(["b", "a"], _G5869)
   Exit: (14) length(["b", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "a"])
   Unify: (14) expressionnotatom2(["b", "a"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["b", "a"])
   Exit: (13) expressionnotatom(["b", "a"])
   Call: (13) lists:append([["c", "a"]], [["b", "a"]], _G5873)
   Unify: (13) lists:append([["c", "a"]], [["b", "a"]], [["c", "a"]|_G5865])
   Exit: (13) lists:append([["c", "a"]], [["b", "a"]], [["c", "a"], ["b", "a"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "a"], ["b", "a"]], _G5877)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "a"], ["b", "a"]], _G5877)
   Call: (14) [[v, d]]=[_G5867|_G5868]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5883)
   Unify: (15) length([v, d], _G5883)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "a"], ["b", "a"]], _G5877)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "a"], ["b", "a"]], _G5877)
   Call: (14) [[v, d]]=[_G5867|_G5868]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5873], [[[v, d], ["b", "a"]]])
   Unify: (14) lists:member([[v, d], _G5873], [[[v, d], ["b", "a"]]])
   Exit: (14) lists:member([[v, d], ["b", "a"]], [[[v, d], ["b", "a"]]])
   Call: (14) lists:append([["c", "a"], ["b", "a"]], [["b", "a"]], _G5888)
   Unify: (14) lists:append([["c", "a"], ["b", "a"]], [["b", "a"]], [["c", "a"]|_G5880])
   Exit: (14) lists:append([["c", "a"], ["b", "a"]], [["b", "a"]], [["c", "a"], ["b", "a"], ["b", "a"]])
   Call: (14) findresult3([], [[[v, d], ["b", "a"]]], [["c", "a"], ["b", "a"], ["b", "a"]], _G5895)
   Unify: (14) findresult3([], [[[v, d], ["b", "a"]]], [["c", "a"], ["b", "a"], ["b", "a"]], [["c", "a"], ["b", "a"], ["b", "a"]])
   Exit: (14) findresult3([], [[[v, d], ["b", "a"]]], [["c", "a"], ["b", "a"], ["b", "a"]], [["c", "a"], ["b", "a"], ["b", "a"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "a"], ["b", "a"]], [["c", "a"], ["b", "a"], ["b", "a"]])
   Exit: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["c", "a"]], [["c", "a"], ["b", "a"], ["b", "a"]])
   Exit: (11) findresult3([["c", "a"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], [["c", "a"], ["b", "a"], ["b", "a"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Exit: (9) interpret1(off, [[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Exit: (8) interpret(off, [[n, f], [["c", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, c], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])

   Call: (8) interpret(off, [[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (8) interpret(off, [[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5554, [], _G5556)
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5545, _G5548, ":-", _G5557]
   Exit: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], _G5572)
   Unify: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5572, [], _G5574)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], _G5572)
   Unify: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]|_G5564])
   Exit: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (9) interpret1(off, [[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
^  Call: (10) retractall(debug(_G5566))
^  Exit: (10) retractall(debug(_G5566))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5570))
^  Exit: (10) retractall(cut(_G5570))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (10) member1([[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["b", "c"], ["a", "b"], [v, d]]]=[_G5574, _G5577]
   Exit: (11) [[n, f], [["b", "c"], ["a", "b"], [v, d]]]=[[n, f], [["b", "c"], ["a", "b"], [v, d]]]
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5586, ":-", _G5595]|_G5581]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["b", "c"], ["a", "b"], [v, d]], _G5606)
   Unify: (11) length([["b", "c"], ["a", "b"], [v, d]], _G5606)
   Exit: (11) length([["b", "c"], ["a", "b"], [v, d]], 3)
   Call: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Exit: (11) length([[v, c], [v, b], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) checkarguments([["b", "c"], ["a", "b"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5608, [], _G5610)
   Unify: (11) checkarguments([["b", "c"], ["a", "b"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5608, [], _G5610)
   Call: (12) [["b", "c"], ["a", "b"], [v, d]]=[_G5598|_G5599]
   Exit: (12) [["b", "c"], ["a", "b"], [v, d]]=[["b", "c"], ["a", "b"], [v, d]]
   Call: (12) expressionnotatom(["b", "c"])
   Unify: (12) expressionnotatom(["b", "c"])
   Call: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) var(["b", "c"])
   Fail: (14) var(["b", "c"])
   Redo: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) isval(["b", "c"])
   Unify: (14) isval(["b", "c"])
   Call: (15) number(["b", "c"])
   Fail: (15) number(["b", "c"])
   Fail: (14) isval(["b", "c"])
   Redo: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) string(["b", "c"])
   Fail: (14) string(["b", "c"])
   Fail: (13) isvalstrempty(["b", "c"])
   Redo: (12) expressionnotatom(["b", "c"])
   Unify: (12) expressionnotatom(["b", "c"])
^  Call: (13) not(atom(["b", "c"]))
^  Unify: (13) not(user:atom(["b", "c"]))
^  Exit: (13) not(user:atom(["b", "c"]))
   Call: (13) length(["b", "c"], _G5614)
   Unify: (13) length(["b", "c"], _G5614)
   Exit: (13) length(["b", "c"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["b", "c"])
   Unify: (13) expressionnotatom2(["b", "c"])
   Call: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) var("b")
   Fail: (15) var("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) isval("b")
   Unify: (15) isval("b")
   Call: (16) number("b")
   Fail: (16) number("b")
   Fail: (15) isval("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) string("b")
   Exit: (15) string("b")
   Exit: (14) isvalstrempty("b")
   Call: (14) expressionnotatom2(["c"])
   Unify: (14) expressionnotatom2(["c"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["c"])
   Exit: (13) expressionnotatom2(["b", "c"])
   Exit: (12) expressionnotatom(["b", "c"])
   Call: (12) [[v, c], [v, b], [v, d]]=[_G5606|_G5607]
   Exit: (12) [[v, c], [v, b], [v, d]]=[[v, c], [v, b], [v, d]]
^  Call: (12) not(var([v, c]))
^  Unify: (12) not(user:var([v, c]))
^  Exit: (12) not(user:var([v, c]))
   Call: (12) isvar([v, c])
   Unify: (12) isvar([v, c])
   Exit: (12) isvar([v, c])
   Call: (12) putvalue([v, c], ["b", "c"], [], _G5624)
   Unify: (12) putvalue([v, c], ["b", "c"], [], _G5624)
^  Call: (13) not(isvar([v, c]))
^  Unify: (13) not(user:isvar([v, c]))
   Call: (14) isvar([v, c])
   Unify: (14) isvar([v, c])
   Exit: (14) isvar([v, c])
^  Fail: (13) not(user:isvar([v, c]))
   Redo: (12) putvalue([v, c], ["b", "c"], [], _G5624)
   Call: (13) isvar([v, c])
   Unify: (13) isvar([v, c])
   Exit: (13) isvar([v, c])
   Call: (13) isvalstrorundef(["b", "c"])
   Unify: (13) isvalstrorundef(["b", "c"])
   Call: (14) var(["b", "c"])
   Fail: (14) var(["b", "c"])
   Redo: (13) isvalstrorundef(["b", "c"])
   Unify: (13) isvalstrorundef(["b", "c"])
^  Call: (14) not(var(["b", "c"]))
^  Unify: (14) not(user:var(["b", "c"]))
^  Exit: (14) not(user:var(["b", "c"]))
   Call: (14) isval(["b", "c"])
   Unify: (14) isval(["b", "c"])
   Call: (15) number(["b", "c"])
   Fail: (15) number(["b", "c"])
   Fail: (14) isval(["b", "c"])
   Redo: (13) isvalstrorundef(["b", "c"])
   Unify: (13) isvalstrorundef(["b", "c"])
^  Call: (14) not(var(["b", "c"]))
^  Unify: (14) not(user:var(["b", "c"]))
^  Exit: (14) not(user:var(["b", "c"]))
   Call: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) isval(["b", "c"])
   Unify: (15) isval(["b", "c"])
   Call: (16) number(["b", "c"])
   Fail: (16) number(["b", "c"])
   Fail: (15) isval(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) string(["b", "c"])
   Fail: (15) string(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) atom(["b", "c"])
   Fail: (15) atom(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
^  Call: (15) not(atom(["b", "c"]))
^  Unify: (15) not(user:atom(["b", "c"]))
^  Exit: (15) not(user:atom(["b", "c"]))
   Call: (15) length(["b", "c"], _G5632)
   Unify: (15) length(["b", "c"], _G5632)
   Exit: (15) length(["b", "c"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "c"])
   Unify: (15) expression2(["b", "c"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["c"])
   Unify: (16) expression2(["c"])
   Call: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) isval("c")
   Unify: (18) isval("c")
   Call: (19) number("c")
   Fail: (19) number("c")
   Fail: (18) isval("c")
   Redo: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) string("c")
   Exit: (18) string("c")
   Exit: (17) expression3("c")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["c"])
   Exit: (15) expression2(["b", "c"])
   Exit: (14) expression(["b", "c"])
   Exit: (13) isvalstrorundef(["b", "c"])
   Call: (13) updatevar([v, c], ["b", "c"], [], _G5634)
   Unify: (13) updatevar([v, c], ["b", "c"], [], _G5634)
   Call: (14) lists:member([[v, c], empty], [])
   Fail: (14) lists:member([[v, c], empty], [])
   Redo: (13) updatevar([v, c], ["b", "c"], [], _G5634)
^  Call: (14) not(member([[v, c], _G5630], []))
^  Unify: (14) not(user:member([[v, c], _G5630], []))
^  Exit: (14) not(user:member([[v, c], _G5630], []))
   Call: (14) _G5630=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, c], ["b", "c"]]], _G5654)
   Unify: (14) lists:append([], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]]])
   Exit: (14) lists:append([], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, c], ["b", "c"], [], [[[v, c], ["b", "c"]]])
   Exit: (12) putvalue([v, c], ["b", "c"], [], [[[v, c], ["b", "c"]]])
   Call: (12) checkarguments([["a", "b"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "c"]]], _G5655, [], _G5657)
   Unify: (12) checkarguments([["a", "b"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "c"]]], _G5655, [], _G5657)
   Call: (13) [["a", "b"], [v, d]]=[_G5645|_G5646]
   Exit: (13) [["a", "b"], [v, d]]=[["a", "b"], [v, d]]
   Call: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
   Call: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Fail: (14) isvalstrempty(["a", "b"])
   Redo: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
^  Call: (14) not(atom(["a", "b"]))
^  Unify: (14) not(user:atom(["a", "b"]))
^  Exit: (14) not(user:atom(["a", "b"]))
   Call: (14) length(["a", "b"], _G5661)
   Unify: (14) length(["a", "b"], _G5661)
   Exit: (14) length(["a", "b"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["a", "b"])
   Unify: (14) expressionnotatom2(["a", "b"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2(["b"])
   Unify: (15) expressionnotatom2(["b"])
   Call: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) var("b")
   Fail: (17) var("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) isvalstrempty("b")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["b"])
   Exit: (14) expressionnotatom2(["a", "b"])
   Exit: (13) expressionnotatom(["a", "b"])
   Call: (13) [[v, b], [v, d]]=[_G5653|_G5654]
   Exit: (13) [[v, b], [v, d]]=[[v, b], [v, d]]
^  Call: (13) not(var([v, b]))
^  Unify: (13) not(user:var([v, b]))
^  Exit: (13) not(user:var([v, b]))
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) putvalue([v, b], ["a", "b"], [[[v, c], ["b", "c"]]], _G5671)
   Unify: (13) putvalue([v, b], ["a", "b"], [[[v, c], ["b", "c"]]], _G5671)
^  Call: (14) not(isvar([v, b]))
^  Unify: (14) not(user:isvar([v, b]))
   Call: (15) isvar([v, b])
   Unify: (15) isvar([v, b])
   Exit: (15) isvar([v, b])
^  Fail: (14) not(user:isvar([v, b]))
   Redo: (13) putvalue([v, b], ["a", "b"], [[[v, c], ["b", "c"]]], _G5671)
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
   Call: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
^  Call: (15) not(var(["a", "b"]))
^  Unify: (15) not(user:var(["a", "b"]))
^  Exit: (15) not(user:var(["a", "b"]))
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
^  Call: (15) not(var(["a", "b"]))
^  Unify: (15) not(user:var(["a", "b"]))
^  Exit: (15) not(user:var(["a", "b"]))
   Call: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) isval(["a", "b"])
   Unify: (16) isval(["a", "b"])
   Call: (17) number(["a", "b"])
   Fail: (17) number(["a", "b"])
   Fail: (16) isval(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) string(["a", "b"])
   Fail: (16) string(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) atom(["a", "b"])
   Fail: (16) atom(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
^  Call: (16) not(atom(["a", "b"]))
^  Unify: (16) not(user:atom(["a", "b"]))
^  Exit: (16) not(user:atom(["a", "b"]))
   Call: (16) length(["a", "b"], _G5679)
   Unify: (16) length(["a", "b"], _G5679)
   Exit: (16) length(["a", "b"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["a", "b"])
   Unify: (16) expression2(["a", "b"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2(["b"])
   Unify: (17) expression2(["b"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["b"])
   Exit: (16) expression2(["a", "b"])
   Exit: (15) expression(["a", "b"])
   Exit: (14) isvalstrorundef(["a", "b"])
   Call: (14) updatevar([v, b], ["a", "b"], [[[v, c], ["b", "c"]]], _G5681)
   Unify: (14) updatevar([v, b], ["a", "b"], [[[v, c], ["b", "c"]]], _G5681)
   Call: (15) lists:member([[v, b], empty], [[[v, c], ["b", "c"]]])
   Unify: (15) lists:member([[v, b], empty], [[[v, c], ["b", "c"]]])
   Fail: (15) lists:member([[v, b], empty], [[[v, c], ["b", "c"]]])
   Redo: (14) updatevar([v, b], ["a", "b"], [[[v, c], ["b", "c"]]], _G5681)
^  Call: (15) not(member([[v, b], _G5677], [[[v, c], ["b", "c"]]]))
^  Unify: (15) not(user:member([[v, b], _G5677], [[[v, c], ["b", "c"]]]))
^  Exit: (15) not(user:member([[v, b], _G5677], [[[v, c], ["b", "c"]]]))
   Call: (15) _G5677=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, c], ["b", "c"]]], [[[v, b], ["a", "b"]]], _G5701)
   Unify: (15) lists:append([[[v, c], ["b", "c"]]], [[[v, b], ["a", "b"]]], [[[v, c], ["b", "c"]]|_G5693])
   Exit: (15) lists:append([[[v, c], ["b", "c"]]], [[[v, b], ["a", "b"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, b], ["a", "b"], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Exit: (13) putvalue([v, b], ["a", "b"], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5711)
   Unify: (15) length([v, d], _G5711)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5719)
   Unify: (15) length([v, d], _G5719)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Unify: (14) getvalue([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5718)
   Unify: (15) isvalstrorundef(_G5718)
   Call: (16) var(_G5718)
   Exit: (16) var(_G5718)
   Exit: (15) isvalstrorundef(_G5718)
   Call: (15) getvar([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Unify: (15) getvar([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Call: (16) lists:member([[v, d], _G5714], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Unify: (16) lists:member([[v, d], _G5714], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Fail: (16) lists:member([[v, d], _G5714], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Redo: (15) getvar([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Unify: (15) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
^  Call: (16) not(member([[v, d], _G5717], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]]))
^  Unify: (16) not(user:member([[v, d], _G5717], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]]))
^  Exit: (16) not(user:member([[v, d], _G5717], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5733)
   Unify: (14) putvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5733)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5733)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5738)
   Unify: (15) updatevar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5738)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], _G5738)
^  Call: (16) not(member([[v, d], _G5734], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]]))
^  Unify: (16) not(user:member([[v, d], _G5734], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]]))
^  Exit: (16) not(user:member([[v, d], _G5734], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]]))
   Call: (16) _G5734=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, d], empty]], _G5758)
   Unify: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, d], empty]], [[[v, c], ["b", "c"]]|_G5750])
   Exit: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5773)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[v, d], [v, d]]], _G5776)
   Unify: (14) checkarguments([], [], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["a", "b"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["b", "c"], ["a", "b"], [v, d]], [[v, c], [v, b], [v, d]], [], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5781]]|_G5773]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5781]]|_G5773]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[_G5775], or, [_G5784]]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[_G5775], or, [_G5784]]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5773]]|_G5765]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5773]]|_G5765]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5767], or, [_G5776]]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5767], or, [_G5776]]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5783, _G5784, _G5785)
   Unify: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5783, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5783)
   Unify: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5783)
   Call: (14) getvalues([v, d], [v, c], _G5781, _G5782, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, c], _G5781, _G5782, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5779)
   Unify: (16) isvalstrorundef(_G5779)
   Call: (17) var(_G5779)
   Exit: (17) var(_G5779)
   Exit: (16) isvalstrorundef(_G5779)
   Call: (16) getvar([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5775], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5775], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5778], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5778], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5778], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (15) getvalue([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (15) getvalue([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, c]))
^  Unify: (16) not(user:isvar([v, c]))
   Call: (17) isvar([v, c])
   Unify: (17) isvar([v, c])
   Exit: (17) isvar([v, c])
^  Fail: (16) not(user:isvar([v, c]))
   Redo: (15) getvalue([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (16) isvar([v, c])
   Unify: (16) isvar([v, c])
   Exit: (16) isvar([v, c])
   Call: (16) isvalstrorundef(_G5785)
   Unify: (16) isvalstrorundef(_G5785)
   Call: (17) var(_G5785)
   Exit: (17) var(_G5785)
   Exit: (16) isvalstrorundef(_G5785)
   Call: (16) getvar([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, c], _G5781], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, c], _G5781], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, c], ["b", "c"]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(["b", "c"]=empty)
^  Unify: (17) not(user: (["b", "c"]=empty))
^  Exit: (17) not(user: (["b", "c"]=empty))
   Exit: (16) getvar([v, c], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (15) getvalue([v, c], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, c], empty, ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) isval(["b", "c"])
   Unify: (15) isval(["b", "c"])
   Call: (16) number(["b", "c"])
   Fail: (16) number(["b", "c"])
   Fail: (15) isval(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) string(["b", "c"])
   Fail: (15) string(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) atom(["b", "c"])
   Fail: (15) atom(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
^  Call: (15) not(atom(["b", "c"]))
^  Unify: (15) not(user:atom(["b", "c"]))
^  Exit: (15) not(user:atom(["b", "c"]))
   Call: (15) length(["b", "c"], _G5803)
   Unify: (15) length(["b", "c"], _G5803)
   Exit: (15) length(["b", "c"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "c"])
   Unify: (15) expression2(["b", "c"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["c"])
   Unify: (16) expression2(["c"])
   Call: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) isval("c")
   Unify: (18) isval("c")
   Call: (19) number("c")
   Fail: (19) number("c")
   Fail: (18) isval("c")
   Redo: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) string("c")
   Exit: (18) string("c")
   Exit: (17) expression3("c")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["c"])
   Exit: (15) expression2(["b", "c"])
   Exit: (14) expression(["b", "c"])
   Call: (14) val1emptyorvalsequal(empty, ["b", "c"])
   Unify: (14) val1emptyorvalsequal(empty, ["b", "c"])
   Exit: (14) val1emptyorvalsequal(empty, ["b", "c"])
   Call: (14) putvalue([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5805)
   Unify: (14) putvalue([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5805)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5805)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["b", "c"])
   Unify: (15) isvalstrorundef(["b", "c"])
   Call: (16) var(["b", "c"])
   Fail: (16) var(["b", "c"])
   Redo: (15) isvalstrorundef(["b", "c"])
   Unify: (15) isvalstrorundef(["b", "c"])
^  Call: (16) not(var(["b", "c"]))
^  Unify: (16) not(user:var(["b", "c"]))
^  Exit: (16) not(user:var(["b", "c"]))
   Call: (16) isval(["b", "c"])
   Unify: (16) isval(["b", "c"])
   Call: (17) number(["b", "c"])
   Fail: (17) number(["b", "c"])
   Fail: (16) isval(["b", "c"])
   Redo: (15) isvalstrorundef(["b", "c"])
   Unify: (15) isvalstrorundef(["b", "c"])
^  Call: (16) not(var(["b", "c"]))
^  Unify: (16) not(user:var(["b", "c"]))
^  Exit: (16) not(user:var(["b", "c"]))
   Call: (16) expression(["b", "c"])
   Unify: (16) expression(["b", "c"])
   Call: (17) isval(["b", "c"])
   Unify: (17) isval(["b", "c"])
   Call: (18) number(["b", "c"])
   Fail: (18) number(["b", "c"])
   Fail: (17) isval(["b", "c"])
   Redo: (16) expression(["b", "c"])
   Unify: (16) expression(["b", "c"])
   Call: (17) string(["b", "c"])
   Fail: (17) string(["b", "c"])
   Redo: (16) expression(["b", "c"])
   Unify: (16) expression(["b", "c"])
   Call: (17) atom(["b", "c"])
   Fail: (17) atom(["b", "c"])
   Redo: (16) expression(["b", "c"])
   Unify: (16) expression(["b", "c"])
^  Call: (17) not(atom(["b", "c"]))
^  Unify: (17) not(user:atom(["b", "c"]))
^  Exit: (17) not(user:atom(["b", "c"]))
   Call: (17) length(["b", "c"], _G5813)
   Unify: (17) length(["b", "c"], _G5813)
   Exit: (17) length(["b", "c"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["b", "c"])
   Unify: (17) expression2(["b", "c"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2(["c"])
   Unify: (18) expression2(["c"])
   Call: (19) expression3("c")
   Unify: (19) expression3("c")
   Call: (20) isval("c")
   Unify: (20) isval("c")
   Call: (21) number("c")
   Fail: (21) number("c")
   Fail: (20) isval("c")
   Redo: (19) expression3("c")
   Unify: (19) expression3("c")
   Call: (20) string("c")
   Exit: (20) string("c")
   Exit: (19) expression3("c")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["c"])
   Exit: (17) expression2(["b", "c"])
   Exit: (16) expression(["b", "c"])
   Exit: (15) isvalstrorundef(["b", "c"])
   Call: (15) updatevar([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5815)
   Unify: (15) updatevar([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], _G5815)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Unify: (16) lists:delete([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Exit: (16) lists:delete([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]])
   Call: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, d], ["b", "c"]]], _G5841)
   Unify: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, d], ["b", "c"]]], [[[v, c], ["b", "c"]]|_G5833])
   Exit: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["a", "b"]]], [[[v, d], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Exit: (14) putvalue([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5851=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], _G5854, [], _G5856)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [[[n, =], [[v, d], [v, c]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [], _G5854)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [], _G5854)
   Call: (12) [[[v, d], [v, d]]]=[[_G5847, _G5850]|_G5845]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5866)
   Unify: (13) length([v, d], _G5866)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [], _G5863)
   Call: (12) lists:member([[v, d], _G5856], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Unify: (12) lists:member([[v, d], _G5856], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Exit: (12) lists:member([[v, d], ["b", "c"]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]])
   Call: (12) lists:append([], [[[v, d], ["b", "c"]]], _G5877)
   Unify: (12) lists:append([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Call: (12) updatevars([], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]], _G5878)
   Unify: (12) updatevars([], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (12) updatevars([], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "c"]], [[v, b], ["a", "b"]], [[v, d], ["b", "c"]]], [], [[[v, d], ["b", "c"]]])
^  Call: (11) not([[[v, d], ["b", "c"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["b", "c"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["b", "c"]]]=[]))
   Call: (11) unique1([[[v, d], ["b", "c"]]], [], _G14)
   Unify: (11) unique1([[[v, d], ["b", "c"]]], [], _G14)
   Call: (12) lists:delete([], [[v, d], ["b", "c"]], _G5883)
   Unify: (12) lists:delete([], [[v, d], ["b", "c"]], [])
   Exit: (12) lists:delete([], [[v, d], ["b", "c"]], [])
   Call: (12) lists:append([], [[[v, d], ["b", "c"]]], _G5886)
   Unify: (12) lists:append([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Call: (12) unique1([], [[[v, d], ["b", "c"]]], _G14)
   Unify: (12) unique1([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (12) unique1([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (11) unique1([[[v, d], ["b", "c"]]], [], [[[v, d], ["b", "c"]]])
   Call: (11) findresult3([["b", "c"], ["a", "b"], [v, d]], [[[v, d], ["b", "c"]]], [], _G5887)
   Unify: (11) findresult3([["b", "c"], ["a", "b"], [v, d]], [[[v, d], ["b", "c"]]], [], _G5887)
   Call: (12) [["b", "c"], ["a", "b"], [v, d]]=[_G5877|_G5878]
   Exit: (12) [["b", "c"], ["a", "b"], [v, d]]=[["b", "c"], ["a", "b"], [v, d]]
   Call: (12) expressionnotatom(["b", "c"])
   Unify: (12) expressionnotatom(["b", "c"])
   Call: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) var(["b", "c"])
   Fail: (14) var(["b", "c"])
   Redo: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) isval(["b", "c"])
   Unify: (14) isval(["b", "c"])
   Call: (15) number(["b", "c"])
   Fail: (15) number(["b", "c"])
   Fail: (14) isval(["b", "c"])
   Redo: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) string(["b", "c"])
   Fail: (14) string(["b", "c"])
   Fail: (13) isvalstrempty(["b", "c"])
   Redo: (12) expressionnotatom(["b", "c"])
   Unify: (12) expressionnotatom(["b", "c"])
^  Call: (13) not(atom(["b", "c"]))
^  Unify: (13) not(user:atom(["b", "c"]))
^  Exit: (13) not(user:atom(["b", "c"]))
   Call: (13) length(["b", "c"], _G5893)
   Unify: (13) length(["b", "c"], _G5893)
   Exit: (13) length(["b", "c"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["b", "c"])
   Unify: (13) expressionnotatom2(["b", "c"])
   Call: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) var("b")
   Fail: (15) var("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) isval("b")
   Unify: (15) isval("b")
   Call: (16) number("b")
   Fail: (16) number("b")
   Fail: (15) isval("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) string("b")
   Exit: (15) string("b")
   Exit: (14) isvalstrempty("b")
   Call: (14) expressionnotatom2(["c"])
   Unify: (14) expressionnotatom2(["c"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["c"])
   Exit: (13) expressionnotatom2(["b", "c"])
   Exit: (12) expressionnotatom(["b", "c"])
   Call: (12) lists:append([], [["b", "c"]], _G5897)
   Unify: (12) lists:append([], [["b", "c"]], [["b", "c"]])
   Exit: (12) lists:append([], [["b", "c"]], [["b", "c"]])
   Call: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["b", "c"]]], [["b", "c"]], _G5898)
   Unify: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["b", "c"]]], [["b", "c"]], _G5898)
   Call: (13) [["a", "b"], [v, d]]=[_G5888|_G5889]
   Exit: (13) [["a", "b"], [v, d]]=[["a", "b"], [v, d]]
   Call: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
   Call: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Fail: (14) isvalstrempty(["a", "b"])
   Redo: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
^  Call: (14) not(atom(["a", "b"]))
^  Unify: (14) not(user:atom(["a", "b"]))
^  Exit: (14) not(user:atom(["a", "b"]))
   Call: (14) length(["a", "b"], _G5904)
   Unify: (14) length(["a", "b"], _G5904)
   Exit: (14) length(["a", "b"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["a", "b"])
   Unify: (14) expressionnotatom2(["a", "b"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2(["b"])
   Unify: (15) expressionnotatom2(["b"])
   Call: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) var("b")
   Fail: (17) var("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) isvalstrempty("b")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["b"])
   Exit: (14) expressionnotatom2(["a", "b"])
   Exit: (13) expressionnotatom(["a", "b"])
   Call: (13) lists:append([["b", "c"]], [["a", "b"]], _G5908)
   Unify: (13) lists:append([["b", "c"]], [["a", "b"]], [["b", "c"]|_G5900])
   Exit: (13) lists:append([["b", "c"]], [["a", "b"]], [["b", "c"], ["a", "b"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["a", "b"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["a", "b"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5918)
   Unify: (15) length([v, d], _G5918)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["a", "b"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["a", "b"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5908], [[[v, d], ["b", "c"]]])
   Unify: (14) lists:member([[v, d], _G5908], [[[v, d], ["b", "c"]]])
   Exit: (14) lists:member([[v, d], ["b", "c"]], [[[v, d], ["b", "c"]]])
   Call: (14) lists:append([["b", "c"], ["a", "b"]], [["b", "c"]], _G5923)
   Unify: (14) lists:append([["b", "c"], ["a", "b"]], [["b", "c"]], [["b", "c"]|_G5915])
   Exit: (14) lists:append([["b", "c"], ["a", "b"]], [["b", "c"]], [["b", "c"], ["a", "b"], ["b", "c"]])
   Call: (14) findresult3([], [[[v, d], ["b", "c"]]], [["b", "c"], ["a", "b"], ["b", "c"]], _G5930)
   Unify: (14) findresult3([], [[[v, d], ["b", "c"]]], [["b", "c"], ["a", "b"], ["b", "c"]], [["b", "c"], ["a", "b"], ["b", "c"]])
   Exit: (14) findresult3([], [[[v, d], ["b", "c"]]], [["b", "c"], ["a", "b"], ["b", "c"]], [["b", "c"], ["a", "b"], ["b", "c"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["a", "b"]], [["b", "c"], ["a", "b"], ["b", "c"]])
   Exit: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["b", "c"]]], [["b", "c"]], [["b", "c"], ["a", "b"], ["b", "c"]])
   Exit: (11) findresult3([["b", "c"], ["a", "b"], [v, d]], [[[v, d], ["b", "c"]]], [], [["b", "c"], ["a", "b"], ["b", "c"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "c"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "c"]]])
   Exit: (9) interpret1(off, [[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "c"]]])
   Exit: (8) interpret(off, [[n, f], [["b", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "c"]]])

   Call: (8) interpret(off, [[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (8) interpret(off, [[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Fail: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5554, [], _G5556)
   Call: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Fail: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5545, _G5548, ":-", _G5557]
   Exit: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], _G5572)
   Unify: (11) lists:append([], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5572, [], _G5574)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], _G5572)
   Unify: (10) lists:append([[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]|_G5564])
   Exit: (10) lists:append([[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (9) interpret1(off, [[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
^  Call: (10) retractall(debug(_G5566))
^  Exit: (10) retractall(debug(_G5566))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5570))
^  Exit: (10) retractall(cut(_G5570))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (10) member1([[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["b", "a"], ["b", "a"], [v, d]]]=[_G5574, _G5577]
   Exit: (11) [[n, f], [["b", "a"], ["b", "a"], [v, d]]]=[[n, f], [["b", "a"], ["b", "a"], [v, d]]]
   Call: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5586, ":-", _G5595]|_G5581]
   Exit: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["b", "a"], ["b", "a"], [v, d]], _G5606)
   Unify: (11) length([["b", "a"], ["b", "a"], [v, d]], _G5606)
   Exit: (11) length([["b", "a"], ["b", "a"], [v, d]], 3)
   Call: (11) length([[v, b], [v, a], [v, d]], 3)
   Unify: (11) length([[v, b], [v, a], [v, d]], 3)
   Unify: (11) length([[v, b], [v, a], [v, d]], 3)
   Exit: (11) length([[v, b], [v, a], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) checkarguments([["b", "a"], ["b", "a"], [v, d]], [[v, b], [v, a], [v, d]], [], _G5608, [], _G5610)
   Unify: (11) checkarguments([["b", "a"], ["b", "a"], [v, d]], [[v, b], [v, a], [v, d]], [], _G5608, [], _G5610)
   Call: (12) [["b", "a"], ["b", "a"], [v, d]]=[_G5598|_G5599]
   Exit: (12) [["b", "a"], ["b", "a"], [v, d]]=[["b", "a"], ["b", "a"], [v, d]]
   Call: (12) expressionnotatom(["b", "a"])
   Unify: (12) expressionnotatom(["b", "a"])
   Call: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) var(["b", "a"])
   Fail: (14) var(["b", "a"])
   Redo: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) isval(["b", "a"])
   Unify: (14) isval(["b", "a"])
   Call: (15) number(["b", "a"])
   Fail: (15) number(["b", "a"])
   Fail: (14) isval(["b", "a"])
   Redo: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) string(["b", "a"])
   Fail: (14) string(["b", "a"])
   Fail: (13) isvalstrempty(["b", "a"])
   Redo: (12) expressionnotatom(["b", "a"])
   Unify: (12) expressionnotatom(["b", "a"])
^  Call: (13) not(atom(["b", "a"]))
^  Unify: (13) not(user:atom(["b", "a"]))
^  Exit: (13) not(user:atom(["b", "a"]))
   Call: (13) length(["b", "a"], _G5614)
   Unify: (13) length(["b", "a"], _G5614)
   Exit: (13) length(["b", "a"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["b", "a"])
   Unify: (13) expressionnotatom2(["b", "a"])
   Call: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) var("b")
   Fail: (15) var("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) isval("b")
   Unify: (15) isval("b")
   Call: (16) number("b")
   Fail: (16) number("b")
   Fail: (15) isval("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) string("b")
   Exit: (15) string("b")
   Exit: (14) isvalstrempty("b")
   Call: (14) expressionnotatom2(["a"])
   Unify: (14) expressionnotatom2(["a"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["a"])
   Exit: (13) expressionnotatom2(["b", "a"])
   Exit: (12) expressionnotatom(["b", "a"])
   Call: (12) [[v, b], [v, a], [v, d]]=[_G5606|_G5607]
   Exit: (12) [[v, b], [v, a], [v, d]]=[[v, b], [v, a], [v, d]]
^  Call: (12) not(var([v, b]))
^  Unify: (12) not(user:var([v, b]))
^  Exit: (12) not(user:var([v, b]))
   Call: (12) isvar([v, b])
   Unify: (12) isvar([v, b])
   Exit: (12) isvar([v, b])
   Call: (12) putvalue([v, b], ["b", "a"], [], _G5624)
   Unify: (12) putvalue([v, b], ["b", "a"], [], _G5624)
^  Call: (13) not(isvar([v, b]))
^  Unify: (13) not(user:isvar([v, b]))
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
^  Fail: (13) not(user:isvar([v, b]))
   Redo: (12) putvalue([v, b], ["b", "a"], [], _G5624)
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) isvalstrorundef(["b", "a"])
   Unify: (13) isvalstrorundef(["b", "a"])
   Call: (14) var(["b", "a"])
   Fail: (14) var(["b", "a"])
   Redo: (13) isvalstrorundef(["b", "a"])
   Unify: (13) isvalstrorundef(["b", "a"])
^  Call: (14) not(var(["b", "a"]))
^  Unify: (14) not(user:var(["b", "a"]))
^  Exit: (14) not(user:var(["b", "a"]))
   Call: (14) isval(["b", "a"])
   Unify: (14) isval(["b", "a"])
   Call: (15) number(["b", "a"])
   Fail: (15) number(["b", "a"])
   Fail: (14) isval(["b", "a"])
   Redo: (13) isvalstrorundef(["b", "a"])
   Unify: (13) isvalstrorundef(["b", "a"])
^  Call: (14) not(var(["b", "a"]))
^  Unify: (14) not(user:var(["b", "a"]))
^  Exit: (14) not(user:var(["b", "a"]))
   Call: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) atom(["b", "a"])
   Fail: (15) atom(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
^  Call: (15) not(atom(["b", "a"]))
^  Unify: (15) not(user:atom(["b", "a"]))
^  Exit: (15) not(user:atom(["b", "a"]))
   Call: (15) length(["b", "a"], _G5632)
   Unify: (15) length(["b", "a"], _G5632)
   Exit: (15) length(["b", "a"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "a"])
   Unify: (15) expression2(["b", "a"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["a"])
   Unify: (16) expression2(["a"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["a"])
   Exit: (15) expression2(["b", "a"])
   Exit: (14) expression(["b", "a"])
   Exit: (13) isvalstrorundef(["b", "a"])
   Call: (13) updatevar([v, b], ["b", "a"], [], _G5634)
   Unify: (13) updatevar([v, b], ["b", "a"], [], _G5634)
   Call: (14) lists:member([[v, b], empty], [])
   Fail: (14) lists:member([[v, b], empty], [])
   Redo: (13) updatevar([v, b], ["b", "a"], [], _G5634)
^  Call: (14) not(member([[v, b], _G5630], []))
^  Unify: (14) not(user:member([[v, b], _G5630], []))
^  Exit: (14) not(user:member([[v, b], _G5630], []))
   Call: (14) _G5630=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, b], ["b", "a"]]], _G5654)
   Unify: (14) lists:append([], [[[v, b], ["b", "a"]]], [[[v, b], ["b", "a"]]])
   Exit: (14) lists:append([], [[[v, b], ["b", "a"]]], [[[v, b], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, b], ["b", "a"], [], [[[v, b], ["b", "a"]]])
   Exit: (12) putvalue([v, b], ["b", "a"], [], [[[v, b], ["b", "a"]]])
   Call: (12) checkarguments([["b", "a"], [v, d]], [[v, a], [v, d]], [[[v, b], ["b", "a"]]], _G5655, [], _G5657)
   Unify: (12) checkarguments([["b", "a"], [v, d]], [[v, a], [v, d]], [[[v, b], ["b", "a"]]], _G5655, [], _G5657)
   Call: (13) [["b", "a"], [v, d]]=[_G5645|_G5646]
   Exit: (13) [["b", "a"], [v, d]]=[["b", "a"], [v, d]]
   Call: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
   Call: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Fail: (14) isvalstrempty(["b", "a"])
   Redo: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
^  Call: (14) not(atom(["b", "a"]))
^  Unify: (14) not(user:atom(["b", "a"]))
^  Exit: (14) not(user:atom(["b", "a"]))
   Call: (14) length(["b", "a"], _G5661)
   Unify: (14) length(["b", "a"], _G5661)
   Exit: (14) length(["b", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "a"])
   Unify: (14) expressionnotatom2(["b", "a"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["b", "a"])
   Exit: (13) expressionnotatom(["b", "a"])
   Call: (13) [[v, a], [v, d]]=[_G5653|_G5654]
   Exit: (13) [[v, a], [v, d]]=[[v, a], [v, d]]
^  Call: (13) not(var([v, a]))
^  Unify: (13) not(user:var([v, a]))
^  Exit: (13) not(user:var([v, a]))
   Call: (13) isvar([v, a])
   Unify: (13) isvar([v, a])
   Exit: (13) isvar([v, a])
   Call: (13) putvalue([v, a], ["b", "a"], [[[v, b], ["b", "a"]]], _G5671)
   Unify: (13) putvalue([v, a], ["b", "a"], [[[v, b], ["b", "a"]]], _G5671)
^  Call: (14) not(isvar([v, a]))
^  Unify: (14) not(user:isvar([v, a]))
   Call: (15) isvar([v, a])
   Unify: (15) isvar([v, a])
   Exit: (15) isvar([v, a])
^  Fail: (14) not(user:isvar([v, a]))
   Redo: (13) putvalue([v, a], ["b", "a"], [[[v, b], ["b", "a"]]], _G5671)
   Call: (14) isvar([v, a])
   Unify: (14) isvar([v, a])
   Exit: (14) isvar([v, a])
   Call: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
^  Call: (15) not(var(["b", "a"]))
^  Unify: (15) not(user:var(["b", "a"]))
^  Exit: (15) not(user:var(["b", "a"]))
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
^  Call: (15) not(var(["b", "a"]))
^  Unify: (15) not(user:var(["b", "a"]))
^  Exit: (15) not(user:var(["b", "a"]))
   Call: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) isval(["b", "a"])
   Unify: (16) isval(["b", "a"])
   Call: (17) number(["b", "a"])
   Fail: (17) number(["b", "a"])
   Fail: (16) isval(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) string(["b", "a"])
   Fail: (16) string(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) atom(["b", "a"])
   Fail: (16) atom(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
^  Call: (16) not(atom(["b", "a"]))
^  Unify: (16) not(user:atom(["b", "a"]))
^  Exit: (16) not(user:atom(["b", "a"]))
   Call: (16) length(["b", "a"], _G5679)
   Unify: (16) length(["b", "a"], _G5679)
   Exit: (16) length(["b", "a"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["b", "a"])
   Unify: (16) expression2(["b", "a"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2(["a"])
   Unify: (17) expression2(["a"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["a"])
   Exit: (16) expression2(["b", "a"])
   Exit: (15) expression(["b", "a"])
   Exit: (14) isvalstrorundef(["b", "a"])
   Call: (14) updatevar([v, a], ["b", "a"], [[[v, b], ["b", "a"]]], _G5681)
   Unify: (14) updatevar([v, a], ["b", "a"], [[[v, b], ["b", "a"]]], _G5681)
   Call: (15) lists:member([[v, a], empty], [[[v, b], ["b", "a"]]])
   Unify: (15) lists:member([[v, a], empty], [[[v, b], ["b", "a"]]])
   Fail: (15) lists:member([[v, a], empty], [[[v, b], ["b", "a"]]])
   Redo: (14) updatevar([v, a], ["b", "a"], [[[v, b], ["b", "a"]]], _G5681)
^  Call: (15) not(member([[v, a], _G5677], [[[v, b], ["b", "a"]]]))
^  Unify: (15) not(user:member([[v, a], _G5677], [[[v, b], ["b", "a"]]]))
^  Exit: (15) not(user:member([[v, a], _G5677], [[[v, b], ["b", "a"]]]))
   Call: (15) _G5677=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, b], ["b", "a"]]], [[[v, a], ["b", "a"]]], _G5701)
   Unify: (15) lists:append([[[v, b], ["b", "a"]]], [[[v, a], ["b", "a"]]], [[[v, b], ["b", "a"]]|_G5693])
   Exit: (15) lists:append([[[v, b], ["b", "a"]]], [[[v, a], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, a], ["b", "a"], [[[v, b], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Exit: (13) putvalue([v, a], ["b", "a"], [[[v, b], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5711)
   Unify: (15) length([v, d], _G5711)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5719)
   Unify: (15) length([v, d], _G5719)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5719, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Unify: (14) getvalue([v, d], _G5719, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5719, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5718)
   Unify: (15) isvalstrorundef(_G5718)
   Call: (16) var(_G5718)
   Exit: (16) var(_G5718)
   Exit: (15) isvalstrorundef(_G5718)
   Call: (15) getvar([v, d], _G5719, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Unify: (15) getvar([v, d], _G5719, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Call: (16) lists:member([[v, d], _G5714], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Unify: (16) lists:member([[v, d], _G5714], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Fail: (16) lists:member([[v, d], _G5714], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Redo: (15) getvar([v, d], _G5719, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Unify: (15) getvar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
^  Call: (16) not(member([[v, d], _G5717], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5717], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5717], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5733)
   Unify: (14) putvalue([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5733)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5733)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5738)
   Unify: (15) updatevar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5738)
   Call: (16) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], _G5738)
^  Call: (16) not(member([[v, d], _G5734], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5734], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5734], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]]))
   Call: (16) _G5734=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, d], empty]], _G5758)
   Unify: (16) lists:append([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, d], empty]], [[[v, b], ["b", "a"]]|_G5750])
   Exit: (16) lists:append([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5773)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[v, d], [v, d]]], _G5776)
   Unify: (14) checkarguments([], [], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["b", "a"], [v, d]], [[v, a], [v, d]], [[[v, b], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["b", "a"], ["b", "a"], [v, d]], [[v, b], [v, a], [v, d]], [], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, b]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, b]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, b]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, b]]]]=[[[n, =], [[v, d], [v, b]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, b]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, b]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
   Call: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, b]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, b]]]=[[n, =], [[v, d], [v, b]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, b]]]=[[not, [_G5781]]|_G5773]
   Fail: (13) [[n, =], [[v, d], [v, b]]]=[[not, [_G5781]]|_G5773]
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, b]]]=[[_G5775], or, [_G5784]]
   Fail: (13) [[n, =], [[v, d], [v, b]]]=[[_G5775], or, [_G5784]]
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, b]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, b]]]=[[n, =], [[v, d], [v, b]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, b]]], _G5784)
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, b]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, b]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, b]]]]=[[not, [_G5773]]|_G5765]
   Fail: (12) [[[n, =], [[v, d], [v, b]]]]=[[not, [_G5773]]|_G5765]
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, b]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, b]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, b]]]]=[[_G5767], or, [_G5776]]
   Fail: (12) [[[n, =], [[v, d], [v, b]]]]=[[_G5767], or, [_G5776]]
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, b]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, b]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, b]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, b]]]]=[[[n, =], [[v, d], [v, b]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, b]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, b]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, b]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5783, _G5784, _G5785)
   Unify: (12) interpretstatement1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, b]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5783, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5783)
   Unify: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5783)
   Call: (14) getvalues([v, d], [v, b], _G5781, _G5782, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, b], _G5781, _G5782, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5780, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5780, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5780, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5779)
   Unify: (16) isvalstrorundef(_G5779)
   Call: (17) var(_G5779)
   Exit: (17) var(_G5779)
   Exit: (16) isvalstrorundef(_G5779)
   Call: (16) getvar([v, d], _G5780, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5780, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5775], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5775], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5780, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5778], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5778], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5778], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, b], _G5786, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, b], _G5786, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, b]))
^  Unify: (16) not(user:isvar([v, b]))
   Call: (17) isvar([v, b])
   Unify: (17) isvar([v, b])
   Exit: (17) isvar([v, b])
^  Fail: (16) not(user:isvar([v, b]))
   Redo: (15) getvalue([v, b], _G5786, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, b])
   Unify: (16) isvar([v, b])
   Exit: (16) isvar([v, b])
   Call: (16) isvalstrorundef(_G5785)
   Unify: (16) isvalstrorundef(_G5785)
   Call: (17) var(_G5785)
   Exit: (17) var(_G5785)
   Exit: (16) isvalstrorundef(_G5785)
   Call: (16) getvar([v, b], _G5786, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, b], _G5786, [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, b], _G5781], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, b], _G5781], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, b], ["b", "a"]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(["b", "a"]=empty)
^  Unify: (17) not(user: (["b", "a"]=empty))
^  Exit: (17) not(user: (["b", "a"]=empty))
   Exit: (16) getvar([v, b], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, b], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, b], empty, ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) atom(["b", "a"])
   Fail: (15) atom(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
^  Call: (15) not(atom(["b", "a"]))
^  Unify: (15) not(user:atom(["b", "a"]))
^  Exit: (15) not(user:atom(["b", "a"]))
   Call: (15) length(["b", "a"], _G5803)
   Unify: (15) length(["b", "a"], _G5803)
   Exit: (15) length(["b", "a"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "a"])
   Unify: (15) expression2(["b", "a"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["a"])
   Unify: (16) expression2(["a"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["a"])
   Exit: (15) expression2(["b", "a"])
   Exit: (14) expression(["b", "a"])
   Call: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Unify: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Exit: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Call: (14) putvalue([v, d], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5805)
   Unify: (14) putvalue([v, d], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5805)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5805)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
   Call: (16) var(["b", "a"])
   Fail: (16) var(["b", "a"])
   Redo: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
^  Call: (16) not(var(["b", "a"]))
^  Unify: (16) not(user:var(["b", "a"]))
^  Exit: (16) not(user:var(["b", "a"]))
   Call: (16) isval(["b", "a"])
   Unify: (16) isval(["b", "a"])
   Call: (17) number(["b", "a"])
   Fail: (17) number(["b", "a"])
   Fail: (16) isval(["b", "a"])
   Redo: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
^  Call: (16) not(var(["b", "a"]))
^  Unify: (16) not(user:var(["b", "a"]))
^  Exit: (16) not(user:var(["b", "a"]))
   Call: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) isval(["b", "a"])
   Unify: (17) isval(["b", "a"])
   Call: (18) number(["b", "a"])
   Fail: (18) number(["b", "a"])
   Fail: (17) isval(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) string(["b", "a"])
   Fail: (17) string(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) atom(["b", "a"])
   Fail: (17) atom(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
^  Call: (17) not(atom(["b", "a"]))
^  Unify: (17) not(user:atom(["b", "a"]))
^  Exit: (17) not(user:atom(["b", "a"]))
   Call: (17) length(["b", "a"], _G5813)
   Unify: (17) length(["b", "a"], _G5813)
   Exit: (17) length(["b", "a"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["b", "a"])
   Unify: (17) expression2(["b", "a"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2(["a"])
   Unify: (18) expression2(["a"])
   Call: (19) expression3("a")
   Unify: (19) expression3("a")
   Call: (20) isval("a")
   Unify: (20) isval("a")
   Call: (21) number("a")
   Fail: (21) number("a")
   Fail: (20) isval("a")
   Redo: (19) expression3("a")
   Unify: (19) expression3("a")
   Call: (20) string("a")
   Exit: (20) string("a")
   Exit: (19) expression3("a")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["a"])
   Exit: (17) expression2(["b", "a"])
   Exit: (16) expression(["b", "a"])
   Exit: (15) isvalstrorundef(["b", "a"])
   Call: (15) updatevar([v, d], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5815)
   Unify: (15) updatevar([v, d], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5815)
   Call: (16) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Unify: (16) lists:delete([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Exit: (16) lists:delete([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[v, d], empty], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]])
   Call: (16) lists:append([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, d], ["b", "a"]]], _G5841)
   Unify: (16) lists:append([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, b], ["b", "a"]]|_G5833])
   Exit: (16) lists:append([[[v, b], ["b", "a"]], [[v, a], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (14) putvalue([v, d], ["b", "a"], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, b]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5851=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], _G5854, [], _G5856)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[n, =], [[v, d], [v, b]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5854)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5854)
   Call: (12) [[[v, d], [v, d]]]=[[_G5847, _G5850]|_G5845]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5866)
   Unify: (13) length([v, d], _G5866)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5863)
   Call: (12) lists:member([[v, d], _G5856], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Unify: (12) lists:member([[v, d], _G5856], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (12) lists:member([[v, d], ["b", "a"]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (12) lists:append([], [[[v, d], ["b", "a"]]], _G5877)
   Unify: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Call: (12) updatevars([], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], _G5878)
   Unify: (12) updatevars([], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) updatevars([], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["b", "a"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], [[[v, d], ["b", "a"]]])
^  Call: (11) not([[[v, d], ["b", "a"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["b", "a"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["b", "a"]]]=[]))
   Call: (11) unique1([[[v, d], ["b", "a"]]], [], _G14)
   Unify: (11) unique1([[[v, d], ["b", "a"]]], [], _G14)
   Call: (12) lists:delete([], [[v, d], ["b", "a"]], _G5883)
   Unify: (12) lists:delete([], [[v, d], ["b", "a"]], [])
   Exit: (12) lists:delete([], [[v, d], ["b", "a"]], [])
   Call: (12) lists:append([], [[[v, d], ["b", "a"]]], _G5886)
   Unify: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Call: (12) unique1([], [[[v, d], ["b", "a"]]], _G14)
   Unify: (12) unique1([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) unique1([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (11) unique1([[[v, d], ["b", "a"]]], [], [[[v, d], ["b", "a"]]])
   Call: (11) findresult3([["b", "a"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], _G5887)
   Unify: (11) findresult3([["b", "a"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], _G5887)
   Call: (12) [["b", "a"], ["b", "a"], [v, d]]=[_G5877|_G5878]
   Exit: (12) [["b", "a"], ["b", "a"], [v, d]]=[["b", "a"], ["b", "a"], [v, d]]
   Call: (12) expressionnotatom(["b", "a"])
   Unify: (12) expressionnotatom(["b", "a"])
   Call: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) var(["b", "a"])
   Fail: (14) var(["b", "a"])
   Redo: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) isval(["b", "a"])
   Unify: (14) isval(["b", "a"])
   Call: (15) number(["b", "a"])
   Fail: (15) number(["b", "a"])
   Fail: (14) isval(["b", "a"])
   Redo: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) string(["b", "a"])
   Fail: (14) string(["b", "a"])
   Fail: (13) isvalstrempty(["b", "a"])
   Redo: (12) expressionnotatom(["b", "a"])
   Unify: (12) expressionnotatom(["b", "a"])
^  Call: (13) not(atom(["b", "a"]))
^  Unify: (13) not(user:atom(["b", "a"]))
^  Exit: (13) not(user:atom(["b", "a"]))
   Call: (13) length(["b", "a"], _G5893)
   Unify: (13) length(["b", "a"], _G5893)
   Exit: (13) length(["b", "a"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["b", "a"])
   Unify: (13) expressionnotatom2(["b", "a"])
   Call: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) var("b")
   Fail: (15) var("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) isval("b")
   Unify: (15) isval("b")
   Call: (16) number("b")
   Fail: (16) number("b")
   Fail: (15) isval("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) string("b")
   Exit: (15) string("b")
   Exit: (14) isvalstrempty("b")
   Call: (14) expressionnotatom2(["a"])
   Unify: (14) expressionnotatom2(["a"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["a"])
   Exit: (13) expressionnotatom2(["b", "a"])
   Exit: (12) expressionnotatom(["b", "a"])
   Call: (12) lists:append([], [["b", "a"]], _G5897)
   Unify: (12) lists:append([], [["b", "a"]], [["b", "a"]])
   Exit: (12) lists:append([], [["b", "a"]], [["b", "a"]])
   Call: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["b", "a"]], _G5898)
   Unify: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["b", "a"]], _G5898)
   Call: (13) [["b", "a"], [v, d]]=[_G5888|_G5889]
   Exit: (13) [["b", "a"], [v, d]]=[["b", "a"], [v, d]]
   Call: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
   Call: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Fail: (14) isvalstrempty(["b", "a"])
   Redo: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
^  Call: (14) not(atom(["b", "a"]))
^  Unify: (14) not(user:atom(["b", "a"]))
^  Exit: (14) not(user:atom(["b", "a"]))
   Call: (14) length(["b", "a"], _G5904)
   Unify: (14) length(["b", "a"], _G5904)
   Exit: (14) length(["b", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "a"])
   Unify: (14) expressionnotatom2(["b", "a"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["b", "a"])
   Exit: (13) expressionnotatom(["b", "a"])
   Call: (13) lists:append([["b", "a"]], [["b", "a"]], _G5908)
   Unify: (13) lists:append([["b", "a"]], [["b", "a"]], [["b", "a"]|_G5900])
   Exit: (13) lists:append([["b", "a"]], [["b", "a"]], [["b", "a"], ["b", "a"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["b", "a"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["b", "a"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5918)
   Unify: (15) length([v, d], _G5918)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["b", "a"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["b", "a"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5908], [[[v, d], ["b", "a"]]])
   Unify: (14) lists:member([[v, d], _G5908], [[[v, d], ["b", "a"]]])
   Exit: (14) lists:member([[v, d], ["b", "a"]], [[[v, d], ["b", "a"]]])
   Call: (14) lists:append([["b", "a"], ["b", "a"]], [["b", "a"]], _G5923)
   Unify: (14) lists:append([["b", "a"], ["b", "a"]], [["b", "a"]], [["b", "a"]|_G5915])
   Exit: (14) lists:append([["b", "a"], ["b", "a"]], [["b", "a"]], [["b", "a"], ["b", "a"], ["b", "a"]])
   Call: (14) findresult3([], [[[v, d], ["b", "a"]]], [["b", "a"], ["b", "a"], ["b", "a"]], _G5930)
   Unify: (14) findresult3([], [[[v, d], ["b", "a"]]], [["b", "a"], ["b", "a"], ["b", "a"]], [["b", "a"], ["b", "a"], ["b", "a"]])
   Exit: (14) findresult3([], [[[v, d], ["b", "a"]]], [["b", "a"], ["b", "a"], ["b", "a"]], [["b", "a"], ["b", "a"], ["b", "a"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["b", "a"]], [["b", "a"], ["b", "a"], ["b", "a"]])
   Exit: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["b", "a"]], [["b", "a"], ["b", "a"], ["b", "a"]])
   Exit: (11) findresult3([["b", "a"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], [["b", "a"], ["b", "a"], ["b", "a"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Exit: (9) interpret1(off, [[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Exit: (8) interpret(off, [[n, f], [["b", "a"], ["b", "a"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])

   Call: (8) interpret(off, [[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (8) interpret(off, [[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Fail: (11) [[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5554, [], _G5556)
   Call: (11) [[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Fail: (11) [[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5545, _G5548, ":-", _G5557]
   Exit: (11) [[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]], _G5572)
   Unify: (11) lists:append([], [[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5572, [], _G5574)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], _G5572)
   Unify: (10) lists:append([[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]|_G5564])
   Exit: (10) lists:append([[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (9) interpret1(off, [[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
^  Call: (10) retractall(debug(_G5566))
^  Exit: (10) retractall(debug(_G5566))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5570))
^  Exit: (10) retractall(cut(_G5570))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (10) member1([[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["c", "b"], ["b", "a"], [v, d]]]=[_G5574, _G5577]
   Exit: (11) [[n, f], [["c", "b"], ["b", "a"], [v, d]]]=[[n, f], [["c", "b"], ["b", "a"], [v, d]]]
   Call: (11) [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5586, ":-", _G5595]|_G5581]
   Exit: (11) [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["c", "b"], ["b", "a"], [v, d]], _G5606)
   Unify: (11) length([["c", "b"], ["b", "a"], [v, d]], _G5606)
   Exit: (11) length([["c", "b"], ["b", "a"], [v, d]], 3)
   Call: (11) length([[v, c], [v, a], [v, d]], 3)
   Unify: (11) length([[v, c], [v, a], [v, d]], 3)
   Unify: (11) length([[v, c], [v, a], [v, d]], 3)
   Exit: (11) length([[v, c], [v, a], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) checkarguments([["c", "b"], ["b", "a"], [v, d]], [[v, c], [v, a], [v, d]], [], _G5608, [], _G5610)
   Unify: (11) checkarguments([["c", "b"], ["b", "a"], [v, d]], [[v, c], [v, a], [v, d]], [], _G5608, [], _G5610)
   Call: (12) [["c", "b"], ["b", "a"], [v, d]]=[_G5598|_G5599]
   Exit: (12) [["c", "b"], ["b", "a"], [v, d]]=[["c", "b"], ["b", "a"], [v, d]]
   Call: (12) expressionnotatom(["c", "b"])
   Unify: (12) expressionnotatom(["c", "b"])
   Call: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) var(["c", "b"])
   Fail: (14) var(["c", "b"])
   Redo: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) isval(["c", "b"])
   Unify: (14) isval(["c", "b"])
   Call: (15) number(["c", "b"])
   Fail: (15) number(["c", "b"])
   Fail: (14) isval(["c", "b"])
   Redo: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) string(["c", "b"])
   Fail: (14) string(["c", "b"])
   Fail: (13) isvalstrempty(["c", "b"])
   Redo: (12) expressionnotatom(["c", "b"])
   Unify: (12) expressionnotatom(["c", "b"])
^  Call: (13) not(atom(["c", "b"]))
^  Unify: (13) not(user:atom(["c", "b"]))
^  Exit: (13) not(user:atom(["c", "b"]))
   Call: (13) length(["c", "b"], _G5614)
   Unify: (13) length(["c", "b"], _G5614)
   Exit: (13) length(["c", "b"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["c", "b"])
   Unify: (13) expressionnotatom2(["c", "b"])
   Call: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) var("c")
   Fail: (15) var("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) isval("c")
   Unify: (15) isval("c")
   Call: (16) number("c")
   Fail: (16) number("c")
   Fail: (15) isval("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) string("c")
   Exit: (15) string("c")
   Exit: (14) isvalstrempty("c")
   Call: (14) expressionnotatom2(["b"])
   Unify: (14) expressionnotatom2(["b"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["b"])
   Exit: (13) expressionnotatom2(["c", "b"])
   Exit: (12) expressionnotatom(["c", "b"])
   Call: (12) [[v, c], [v, a], [v, d]]=[_G5606|_G5607]
   Exit: (12) [[v, c], [v, a], [v, d]]=[[v, c], [v, a], [v, d]]
^  Call: (12) not(var([v, c]))
^  Unify: (12) not(user:var([v, c]))
^  Exit: (12) not(user:var([v, c]))
   Call: (12) isvar([v, c])
   Unify: (12) isvar([v, c])
   Exit: (12) isvar([v, c])
   Call: (12) putvalue([v, c], ["c", "b"], [], _G5624)
   Unify: (12) putvalue([v, c], ["c", "b"], [], _G5624)
^  Call: (13) not(isvar([v, c]))
^  Unify: (13) not(user:isvar([v, c]))
   Call: (14) isvar([v, c])
   Unify: (14) isvar([v, c])
   Exit: (14) isvar([v, c])
^  Fail: (13) not(user:isvar([v, c]))
   Redo: (12) putvalue([v, c], ["c", "b"], [], _G5624)
   Call: (13) isvar([v, c])
   Unify: (13) isvar([v, c])
   Exit: (13) isvar([v, c])
   Call: (13) isvalstrorundef(["c", "b"])
   Unify: (13) isvalstrorundef(["c", "b"])
   Call: (14) var(["c", "b"])
   Fail: (14) var(["c", "b"])
   Redo: (13) isvalstrorundef(["c", "b"])
   Unify: (13) isvalstrorundef(["c", "b"])
^  Call: (14) not(var(["c", "b"]))
^  Unify: (14) not(user:var(["c", "b"]))
^  Exit: (14) not(user:var(["c", "b"]))
   Call: (14) isval(["c", "b"])
   Unify: (14) isval(["c", "b"])
   Call: (15) number(["c", "b"])
   Fail: (15) number(["c", "b"])
   Fail: (14) isval(["c", "b"])
   Redo: (13) isvalstrorundef(["c", "b"])
   Unify: (13) isvalstrorundef(["c", "b"])
^  Call: (14) not(var(["c", "b"]))
^  Unify: (14) not(user:var(["c", "b"]))
^  Exit: (14) not(user:var(["c", "b"]))
   Call: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) isval(["c", "b"])
   Unify: (15) isval(["c", "b"])
   Call: (16) number(["c", "b"])
   Fail: (16) number(["c", "b"])
   Fail: (15) isval(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) string(["c", "b"])
   Fail: (15) string(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) atom(["c", "b"])
   Fail: (15) atom(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
^  Call: (15) not(atom(["c", "b"]))
^  Unify: (15) not(user:atom(["c", "b"]))
^  Exit: (15) not(user:atom(["c", "b"]))
   Call: (15) length(["c", "b"], _G5632)
   Unify: (15) length(["c", "b"], _G5632)
   Exit: (15) length(["c", "b"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["c", "b"])
   Unify: (15) expression2(["c", "b"])
   Call: (16) expression3("c")
   Unify: (16) expression3("c")
   Call: (17) isval("c")
   Unify: (17) isval("c")
   Call: (18) number("c")
   Fail: (18) number("c")
   Fail: (17) isval("c")
   Redo: (16) expression3("c")
   Unify: (16) expression3("c")
   Call: (17) string("c")
   Exit: (17) string("c")
   Exit: (16) expression3("c")
   Call: (16) expression2(["b"])
   Unify: (16) expression2(["b"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["b"])
   Exit: (15) expression2(["c", "b"])
   Exit: (14) expression(["c", "b"])
   Exit: (13) isvalstrorundef(["c", "b"])
   Call: (13) updatevar([v, c], ["c", "b"], [], _G5634)
   Unify: (13) updatevar([v, c], ["c", "b"], [], _G5634)
   Call: (14) lists:member([[v, c], empty], [])
   Fail: (14) lists:member([[v, c], empty], [])
   Redo: (13) updatevar([v, c], ["c", "b"], [], _G5634)
^  Call: (14) not(member([[v, c], _G5630], []))
^  Unify: (14) not(user:member([[v, c], _G5630], []))
^  Exit: (14) not(user:member([[v, c], _G5630], []))
   Call: (14) _G5630=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, c], ["c", "b"]]], _G5654)
   Unify: (14) lists:append([], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]]])
   Exit: (14) lists:append([], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, c], ["c", "b"], [], [[[v, c], ["c", "b"]]])
   Exit: (12) putvalue([v, c], ["c", "b"], [], [[[v, c], ["c", "b"]]])
   Call: (12) checkarguments([["b", "a"], [v, d]], [[v, a], [v, d]], [[[v, c], ["c", "b"]]], _G5655, [], _G5657)
   Unify: (12) checkarguments([["b", "a"], [v, d]], [[v, a], [v, d]], [[[v, c], ["c", "b"]]], _G5655, [], _G5657)
   Call: (13) [["b", "a"], [v, d]]=[_G5645|_G5646]
   Exit: (13) [["b", "a"], [v, d]]=[["b", "a"], [v, d]]
   Call: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
   Call: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Fail: (14) isvalstrempty(["b", "a"])
   Redo: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
^  Call: (14) not(atom(["b", "a"]))
^  Unify: (14) not(user:atom(["b", "a"]))
^  Exit: (14) not(user:atom(["b", "a"]))
   Call: (14) length(["b", "a"], _G5661)
   Unify: (14) length(["b", "a"], _G5661)
   Exit: (14) length(["b", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "a"])
   Unify: (14) expressionnotatom2(["b", "a"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["b", "a"])
   Exit: (13) expressionnotatom(["b", "a"])
   Call: (13) [[v, a], [v, d]]=[_G5653|_G5654]
   Exit: (13) [[v, a], [v, d]]=[[v, a], [v, d]]
^  Call: (13) not(var([v, a]))
^  Unify: (13) not(user:var([v, a]))
^  Exit: (13) not(user:var([v, a]))
   Call: (13) isvar([v, a])
   Unify: (13) isvar([v, a])
   Exit: (13) isvar([v, a])
   Call: (13) putvalue([v, a], ["b", "a"], [[[v, c], ["c", "b"]]], _G5671)
   Unify: (13) putvalue([v, a], ["b", "a"], [[[v, c], ["c", "b"]]], _G5671)
^  Call: (14) not(isvar([v, a]))
^  Unify: (14) not(user:isvar([v, a]))
   Call: (15) isvar([v, a])
   Unify: (15) isvar([v, a])
   Exit: (15) isvar([v, a])
^  Fail: (14) not(user:isvar([v, a]))
   Redo: (13) putvalue([v, a], ["b", "a"], [[[v, c], ["c", "b"]]], _G5671)
   Call: (14) isvar([v, a])
   Unify: (14) isvar([v, a])
   Exit: (14) isvar([v, a])
   Call: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
^  Call: (15) not(var(["b", "a"]))
^  Unify: (15) not(user:var(["b", "a"]))
^  Exit: (15) not(user:var(["b", "a"]))
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
^  Call: (15) not(var(["b", "a"]))
^  Unify: (15) not(user:var(["b", "a"]))
^  Exit: (15) not(user:var(["b", "a"]))
   Call: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) isval(["b", "a"])
   Unify: (16) isval(["b", "a"])
   Call: (17) number(["b", "a"])
   Fail: (17) number(["b", "a"])
   Fail: (16) isval(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) string(["b", "a"])
   Fail: (16) string(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) atom(["b", "a"])
   Fail: (16) atom(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
^  Call: (16) not(atom(["b", "a"]))
^  Unify: (16) not(user:atom(["b", "a"]))
^  Exit: (16) not(user:atom(["b", "a"]))
   Call: (16) length(["b", "a"], _G5679)
   Unify: (16) length(["b", "a"], _G5679)
   Exit: (16) length(["b", "a"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["b", "a"])
   Unify: (16) expression2(["b", "a"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2(["a"])
   Unify: (17) expression2(["a"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["a"])
   Exit: (16) expression2(["b", "a"])
   Exit: (15) expression(["b", "a"])
   Exit: (14) isvalstrorundef(["b", "a"])
   Call: (14) updatevar([v, a], ["b", "a"], [[[v, c], ["c", "b"]]], _G5681)
   Unify: (14) updatevar([v, a], ["b", "a"], [[[v, c], ["c", "b"]]], _G5681)
   Call: (15) lists:member([[v, a], empty], [[[v, c], ["c", "b"]]])
   Unify: (15) lists:member([[v, a], empty], [[[v, c], ["c", "b"]]])
   Fail: (15) lists:member([[v, a], empty], [[[v, c], ["c", "b"]]])
   Redo: (14) updatevar([v, a], ["b", "a"], [[[v, c], ["c", "b"]]], _G5681)
^  Call: (15) not(member([[v, a], _G5677], [[[v, c], ["c", "b"]]]))
^  Unify: (15) not(user:member([[v, a], _G5677], [[[v, c], ["c", "b"]]]))
^  Exit: (15) not(user:member([[v, a], _G5677], [[[v, c], ["c", "b"]]]))
   Call: (15) _G5677=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, c], ["c", "b"]]], [[[v, a], ["b", "a"]]], _G5701)
   Unify: (15) lists:append([[[v, c], ["c", "b"]]], [[[v, a], ["b", "a"]]], [[[v, c], ["c", "b"]]|_G5693])
   Exit: (15) lists:append([[[v, c], ["c", "b"]]], [[[v, a], ["b", "a"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, a], ["b", "a"], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Exit: (13) putvalue([v, a], ["b", "a"], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5711)
   Unify: (15) length([v, d], _G5711)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5719)
   Unify: (15) length([v, d], _G5719)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5719, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Unify: (14) getvalue([v, d], _G5719, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5719, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5718)
   Unify: (15) isvalstrorundef(_G5718)
   Call: (16) var(_G5718)
   Exit: (16) var(_G5718)
   Exit: (15) isvalstrorundef(_G5718)
   Call: (15) getvar([v, d], _G5719, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Unify: (15) getvar([v, d], _G5719, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Call: (16) lists:member([[v, d], _G5714], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Unify: (16) lists:member([[v, d], _G5714], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Fail: (16) lists:member([[v, d], _G5714], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Redo: (15) getvar([v, d], _G5719, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Unify: (15) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
^  Call: (16) not(member([[v, d], _G5717], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5717], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5717], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5733)
   Unify: (14) putvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5733)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5733)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5738)
   Unify: (15) updatevar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5738)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], _G5738)
^  Call: (16) not(member([[v, d], _G5734], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5734], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5734], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]]))
   Call: (16) _G5734=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, d], empty]], _G5758)
   Unify: (16) lists:append([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, d], empty]], [[[v, c], ["c", "b"]]|_G5750])
   Exit: (16) lists:append([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5773)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[v, d], [v, d]]], _G5776)
   Unify: (14) checkarguments([], [], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["b", "a"], [v, d]], [[v, a], [v, d]], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["c", "b"], ["b", "a"], [v, d]], [[v, c], [v, a], [v, d]], [], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, a]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, a]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, a]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, a]]]]=[[[n, =], [[v, d], [v, a]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, a]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, a]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, a]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, a]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, a]]]))
   Call: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, a]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, a]]]=[[n, =], [[v, d], [v, a]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, a]]]=[[not, [_G5781]]|_G5773]
   Fail: (13) [[n, =], [[v, d], [v, a]]]=[[not, [_G5781]]|_G5773]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, a]]]=[[_G5775], or, [_G5784]]
   Fail: (13) [[n, =], [[v, d], [v, a]]]=[[_G5775], or, [_G5784]]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, a]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, a]]]=[[n, =], [[v, d], [v, a]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, a]]], _G5784)
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, a]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, a]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, a]]]]=[[not, [_G5773]]|_G5765]
   Fail: (12) [[[n, =], [[v, d], [v, a]]]]=[[not, [_G5773]]|_G5765]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, a]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, a]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, a]]]]=[[_G5767], or, [_G5776]]
   Fail: (12) [[[n, =], [[v, d], [v, a]]]]=[[_G5767], or, [_G5776]]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, a]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, a]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, a]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, a]]]]=[[[n, =], [[v, d], [v, a]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, a]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, a]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, a]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, a]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, a]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, a]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5783, _G5784, _G5785)
   Unify: (12) interpretstatement1([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, a]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5783, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, a], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5783)
   Unify: (13) interpretpart(is, [v, d], [v, a], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5783)
   Call: (14) getvalues([v, d], [v, a], _G5781, _G5782, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, a], _G5781, _G5782, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5780, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5780, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5780, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5779)
   Unify: (16) isvalstrorundef(_G5779)
   Call: (17) var(_G5779)
   Exit: (17) var(_G5779)
   Exit: (16) isvalstrorundef(_G5779)
   Call: (16) getvar([v, d], _G5780, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5780, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5775], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5775], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5780, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5778], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5778], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5778], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, a], _G5786, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, a], _G5786, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, a]))
^  Unify: (16) not(user:isvar([v, a]))
   Call: (17) isvar([v, a])
   Unify: (17) isvar([v, a])
   Exit: (17) isvar([v, a])
^  Fail: (16) not(user:isvar([v, a]))
   Redo: (15) getvalue([v, a], _G5786, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, a])
   Unify: (16) isvar([v, a])
   Exit: (16) isvar([v, a])
   Call: (16) isvalstrorundef(_G5785)
   Unify: (16) isvalstrorundef(_G5785)
   Call: (17) var(_G5785)
   Exit: (17) var(_G5785)
   Exit: (16) isvalstrorundef(_G5785)
   Call: (16) getvar([v, a], _G5786, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, a], _G5786, [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, a], _G5781], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, a], _G5781], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, a], ["b", "a"]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(["b", "a"]=empty)
^  Unify: (17) not(user: (["b", "a"]=empty))
^  Exit: (17) not(user: (["b", "a"]=empty))
   Exit: (16) getvar([v, a], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, a], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, a], empty, ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) atom(["b", "a"])
   Fail: (15) atom(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
^  Call: (15) not(atom(["b", "a"]))
^  Unify: (15) not(user:atom(["b", "a"]))
^  Exit: (15) not(user:atom(["b", "a"]))
   Call: (15) length(["b", "a"], _G5803)
   Unify: (15) length(["b", "a"], _G5803)
   Exit: (15) length(["b", "a"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "a"])
   Unify: (15) expression2(["b", "a"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["a"])
   Unify: (16) expression2(["a"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["a"])
   Exit: (15) expression2(["b", "a"])
   Exit: (14) expression(["b", "a"])
   Call: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Unify: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Exit: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Call: (14) putvalue([v, d], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5805)
   Unify: (14) putvalue([v, d], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5805)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5805)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
   Call: (16) var(["b", "a"])
   Fail: (16) var(["b", "a"])
   Redo: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
^  Call: (16) not(var(["b", "a"]))
^  Unify: (16) not(user:var(["b", "a"]))
^  Exit: (16) not(user:var(["b", "a"]))
   Call: (16) isval(["b", "a"])
   Unify: (16) isval(["b", "a"])
   Call: (17) number(["b", "a"])
   Fail: (17) number(["b", "a"])
   Fail: (16) isval(["b", "a"])
   Redo: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
^  Call: (16) not(var(["b", "a"]))
^  Unify: (16) not(user:var(["b", "a"]))
^  Exit: (16) not(user:var(["b", "a"]))
   Call: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) isval(["b", "a"])
   Unify: (17) isval(["b", "a"])
   Call: (18) number(["b", "a"])
   Fail: (18) number(["b", "a"])
   Fail: (17) isval(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) string(["b", "a"])
   Fail: (17) string(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) atom(["b", "a"])
   Fail: (17) atom(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
^  Call: (17) not(atom(["b", "a"]))
^  Unify: (17) not(user:atom(["b", "a"]))
^  Exit: (17) not(user:atom(["b", "a"]))
   Call: (17) length(["b", "a"], _G5813)
   Unify: (17) length(["b", "a"], _G5813)
   Exit: (17) length(["b", "a"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["b", "a"])
   Unify: (17) expression2(["b", "a"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2(["a"])
   Unify: (18) expression2(["a"])
   Call: (19) expression3("a")
   Unify: (19) expression3("a")
   Call: (20) isval("a")
   Unify: (20) isval("a")
   Call: (21) number("a")
   Fail: (21) number("a")
   Fail: (20) isval("a")
   Redo: (19) expression3("a")
   Unify: (19) expression3("a")
   Call: (20) string("a")
   Exit: (20) string("a")
   Exit: (19) expression3("a")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["a"])
   Exit: (17) expression2(["b", "a"])
   Exit: (16) expression(["b", "a"])
   Exit: (15) isvalstrorundef(["b", "a"])
   Call: (15) updatevar([v, d], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5815)
   Unify: (15) updatevar([v, d], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], _G5815)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Unify: (16) lists:delete([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Exit: (16) lists:delete([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[v, d], empty], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]])
   Call: (16) lists:append([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, d], ["b", "a"]]], _G5841)
   Unify: (16) lists:append([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, c], ["c", "b"]]|_G5833])
   Exit: (16) lists:append([[[v, c], ["c", "b"]], [[v, a], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (14) putvalue([v, d], ["b", "a"], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, a], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, a], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, a], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, a]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5851=[[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], _G5854, [], _G5856)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[n, =], [[v, d], [v, a]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5854)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5854)
   Call: (12) [[[v, d], [v, d]]]=[[_G5847, _G5850]|_G5845]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5866)
   Unify: (13) length([v, d], _G5866)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], _G5863)
   Call: (12) lists:member([[v, d], _G5856], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Unify: (12) lists:member([[v, d], _G5856], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Exit: (12) lists:member([[v, d], ["b", "a"]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]])
   Call: (12) lists:append([], [[[v, d], ["b", "a"]]], _G5877)
   Unify: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Call: (12) updatevars([], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], _G5878)
   Unify: (12) updatevars([], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) updatevars([], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["c", "b"]], [[v, a], ["b", "a"]], [[v, d], ["b", "a"]]], [], [[[v, d], ["b", "a"]]])
^  Call: (11) not([[[v, d], ["b", "a"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["b", "a"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["b", "a"]]]=[]))
   Call: (11) unique1([[[v, d], ["b", "a"]]], [], _G14)
   Unify: (11) unique1([[[v, d], ["b", "a"]]], [], _G14)
   Call: (12) lists:delete([], [[v, d], ["b", "a"]], _G5883)
   Unify: (12) lists:delete([], [[v, d], ["b", "a"]], [])
   Exit: (12) lists:delete([], [[v, d], ["b", "a"]], [])
   Call: (12) lists:append([], [[[v, d], ["b", "a"]]], _G5886)
   Unify: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Call: (12) unique1([], [[[v, d], ["b", "a"]]], _G14)
   Unify: (12) unique1([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) unique1([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (11) unique1([[[v, d], ["b", "a"]]], [], [[[v, d], ["b", "a"]]])
   Call: (11) findresult3([["c", "b"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], _G5887)
   Unify: (11) findresult3([["c", "b"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], _G5887)
   Call: (12) [["c", "b"], ["b", "a"], [v, d]]=[_G5877|_G5878]
   Exit: (12) [["c", "b"], ["b", "a"], [v, d]]=[["c", "b"], ["b", "a"], [v, d]]
   Call: (12) expressionnotatom(["c", "b"])
   Unify: (12) expressionnotatom(["c", "b"])
   Call: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) var(["c", "b"])
   Fail: (14) var(["c", "b"])
   Redo: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) isval(["c", "b"])
   Unify: (14) isval(["c", "b"])
   Call: (15) number(["c", "b"])
   Fail: (15) number(["c", "b"])
   Fail: (14) isval(["c", "b"])
   Redo: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) string(["c", "b"])
   Fail: (14) string(["c", "b"])
   Fail: (13) isvalstrempty(["c", "b"])
   Redo: (12) expressionnotatom(["c", "b"])
   Unify: (12) expressionnotatom(["c", "b"])
^  Call: (13) not(atom(["c", "b"]))
^  Unify: (13) not(user:atom(["c", "b"]))
^  Exit: (13) not(user:atom(["c", "b"]))
   Call: (13) length(["c", "b"], _G5893)
   Unify: (13) length(["c", "b"], _G5893)
   Exit: (13) length(["c", "b"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["c", "b"])
   Unify: (13) expressionnotatom2(["c", "b"])
   Call: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) var("c")
   Fail: (15) var("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) isval("c")
   Unify: (15) isval("c")
   Call: (16) number("c")
   Fail: (16) number("c")
   Fail: (15) isval("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) string("c")
   Exit: (15) string("c")
   Exit: (14) isvalstrempty("c")
   Call: (14) expressionnotatom2(["b"])
   Unify: (14) expressionnotatom2(["b"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["b"])
   Exit: (13) expressionnotatom2(["c", "b"])
   Exit: (12) expressionnotatom(["c", "b"])
   Call: (12) lists:append([], [["c", "b"]], _G5897)
   Unify: (12) lists:append([], [["c", "b"]], [["c", "b"]])
   Exit: (12) lists:append([], [["c", "b"]], [["c", "b"]])
   Call: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["c", "b"]], _G5898)
   Unify: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["c", "b"]], _G5898)
   Call: (13) [["b", "a"], [v, d]]=[_G5888|_G5889]
   Exit: (13) [["b", "a"], [v, d]]=[["b", "a"], [v, d]]
   Call: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
   Call: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Fail: (14) isvalstrempty(["b", "a"])
   Redo: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
^  Call: (14) not(atom(["b", "a"]))
^  Unify: (14) not(user:atom(["b", "a"]))
^  Exit: (14) not(user:atom(["b", "a"]))
   Call: (14) length(["b", "a"], _G5904)
   Unify: (14) length(["b", "a"], _G5904)
   Exit: (14) length(["b", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "a"])
   Unify: (14) expressionnotatom2(["b", "a"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["b", "a"])
   Exit: (13) expressionnotatom(["b", "a"])
   Call: (13) lists:append([["c", "b"]], [["b", "a"]], _G5908)
   Unify: (13) lists:append([["c", "b"]], [["b", "a"]], [["c", "b"]|_G5900])
   Exit: (13) lists:append([["c", "b"]], [["b", "a"]], [["c", "b"], ["b", "a"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "b"], ["b", "a"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "b"], ["b", "a"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5918)
   Unify: (15) length([v, d], _G5918)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "b"], ["b", "a"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "b"], ["b", "a"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5908], [[[v, d], ["b", "a"]]])
   Unify: (14) lists:member([[v, d], _G5908], [[[v, d], ["b", "a"]]])
   Exit: (14) lists:member([[v, d], ["b", "a"]], [[[v, d], ["b", "a"]]])
   Call: (14) lists:append([["c", "b"], ["b", "a"]], [["b", "a"]], _G5923)
   Unify: (14) lists:append([["c", "b"], ["b", "a"]], [["b", "a"]], [["c", "b"]|_G5915])
   Exit: (14) lists:append([["c", "b"], ["b", "a"]], [["b", "a"]], [["c", "b"], ["b", "a"], ["b", "a"]])
   Call: (14) findresult3([], [[[v, d], ["b", "a"]]], [["c", "b"], ["b", "a"], ["b", "a"]], _G5930)
   Unify: (14) findresult3([], [[[v, d], ["b", "a"]]], [["c", "b"], ["b", "a"], ["b", "a"]], [["c", "b"], ["b", "a"], ["b", "a"]])
   Exit: (14) findresult3([], [[[v, d], ["b", "a"]]], [["c", "b"], ["b", "a"], ["b", "a"]], [["c", "b"], ["b", "a"], ["b", "a"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["c", "b"], ["b", "a"]], [["c", "b"], ["b", "a"], ["b", "a"]])
   Exit: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["c", "b"]], [["c", "b"], ["b", "a"], ["b", "a"]])
   Exit: (11) findresult3([["c", "b"], ["b", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], [["c", "b"], ["b", "a"], ["b", "a"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Exit: (9) interpret1(off, [[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Exit: (8) interpret(off, [[n, f], [["c", "b"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])

   Call: (8) interpret(off, [[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (8) interpret(off, [[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Call: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5543|_G5544]
   Exit: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], _G5555, "->", _G5564]
   Fail: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], _G5555, "->", _G5564]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555, [], _G5557)
   Call: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], "->", _G5561]
   Fail: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], "->", _G5561]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Call: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5543|_G5544]
   Exit: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5546, _G5549, ":-", _G5558]
   Exit: (11) [[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], _G5573)
   Unify: (11) lists:append([], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5573, [], _G5575)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], _G5573)
   Unify: (10) lists:append([[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]|_G5565])
   Exit: (10) lists:append([[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, b], [v, a], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (9) interpret1(off, [[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
^  Call: (10) retractall(debug(_G5567))
^  Exit: (10) retractall(debug(_G5567))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5571))
^  Exit: (10) retractall(cut(_G5571))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (10) member1([[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["a", "c"], ["a", "b"], [v, d]]]=[_G5575, _G5578]
   Exit: (11) [[n, f], [["a", "c"], ["a", "b"], [v, d]]]=[[n, f], [["a", "c"], ["a", "b"], [v, d]]]
   Call: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5587, ":-", _G5596]|_G5582]
   Exit: (11) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["a", "c"], ["a", "b"], [v, d]], _G5607)
   Unify: (11) length([["a", "c"], ["a", "b"], [v, d]], _G5607)
   Exit: (11) length([["a", "c"], ["a", "b"], [v, d]], 3)
   Call: (11) length([[v, b], [v, a], [v, d]], 3)
   Unify: (11) length([[v, b], [v, a], [v, d]], 3)
   Unify: (11) length([[v, b], [v, a], [v, d]], 3)
   Exit: (11) length([[v, b], [v, a], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) checkarguments([["a", "c"], ["a", "b"], [v, d]], [[v, b], [v, a], [v, d]], [], _G5609, [], _G5611)
   Unify: (11) checkarguments([["a", "c"], ["a", "b"], [v, d]], [[v, b], [v, a], [v, d]], [], _G5609, [], _G5611)
   Call: (12) [["a", "c"], ["a", "b"], [v, d]]=[_G5599|_G5600]
   Exit: (12) [["a", "c"], ["a", "b"], [v, d]]=[["a", "c"], ["a", "b"], [v, d]]
   Call: (12) expressionnotatom(["a", "c"])
   Unify: (12) expressionnotatom(["a", "c"])
   Call: (13) isvalstrempty(["a", "c"])
   Unify: (13) isvalstrempty(["a", "c"])
   Call: (14) var(["a", "c"])
   Fail: (14) var(["a", "c"])
   Redo: (13) isvalstrempty(["a", "c"])
   Unify: (13) isvalstrempty(["a", "c"])
   Call: (14) isval(["a", "c"])
   Unify: (14) isval(["a", "c"])
   Call: (15) number(["a", "c"])
   Fail: (15) number(["a", "c"])
   Fail: (14) isval(["a", "c"])
   Redo: (13) isvalstrempty(["a", "c"])
   Unify: (13) isvalstrempty(["a", "c"])
   Call: (14) string(["a", "c"])
   Fail: (14) string(["a", "c"])
   Fail: (13) isvalstrempty(["a", "c"])
   Redo: (12) expressionnotatom(["a", "c"])
   Unify: (12) expressionnotatom(["a", "c"])
^  Call: (13) not(atom(["a", "c"]))
^  Unify: (13) not(user:atom(["a", "c"]))
^  Exit: (13) not(user:atom(["a", "c"]))
   Call: (13) length(["a", "c"], _G5615)
   Unify: (13) length(["a", "c"], _G5615)
   Exit: (13) length(["a", "c"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["a", "c"])
   Unify: (13) expressionnotatom2(["a", "c"])
   Call: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) var("a")
   Fail: (15) var("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) isval("a")
   Unify: (15) isval("a")
   Call: (16) number("a")
   Fail: (16) number("a")
   Fail: (15) isval("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) string("a")
   Exit: (15) string("a")
   Exit: (14) isvalstrempty("a")
   Call: (14) expressionnotatom2(["c"])
   Unify: (14) expressionnotatom2(["c"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["c"])
   Exit: (13) expressionnotatom2(["a", "c"])
   Exit: (12) expressionnotatom(["a", "c"])
   Call: (12) [[v, b], [v, a], [v, d]]=[_G5607|_G5608]
   Exit: (12) [[v, b], [v, a], [v, d]]=[[v, b], [v, a], [v, d]]
^  Call: (12) not(var([v, b]))
^  Unify: (12) not(user:var([v, b]))
^  Exit: (12) not(user:var([v, b]))
   Call: (12) isvar([v, b])
   Unify: (12) isvar([v, b])
   Exit: (12) isvar([v, b])
   Call: (12) putvalue([v, b], ["a", "c"], [], _G5625)
   Unify: (12) putvalue([v, b], ["a", "c"], [], _G5625)
^  Call: (13) not(isvar([v, b]))
^  Unify: (13) not(user:isvar([v, b]))
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
^  Fail: (13) not(user:isvar([v, b]))
   Redo: (12) putvalue([v, b], ["a", "c"], [], _G5625)
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) isvalstrorundef(["a", "c"])
   Unify: (13) isvalstrorundef(["a", "c"])
   Call: (14) var(["a", "c"])
   Fail: (14) var(["a", "c"])
   Redo: (13) isvalstrorundef(["a", "c"])
   Unify: (13) isvalstrorundef(["a", "c"])
^  Call: (14) not(var(["a", "c"]))
^  Unify: (14) not(user:var(["a", "c"]))
^  Exit: (14) not(user:var(["a", "c"]))
   Call: (14) isval(["a", "c"])
   Unify: (14) isval(["a", "c"])
   Call: (15) number(["a", "c"])
   Fail: (15) number(["a", "c"])
   Fail: (14) isval(["a", "c"])
   Redo: (13) isvalstrorundef(["a", "c"])
   Unify: (13) isvalstrorundef(["a", "c"])
^  Call: (14) not(var(["a", "c"]))
^  Unify: (14) not(user:var(["a", "c"]))
^  Exit: (14) not(user:var(["a", "c"]))
   Call: (14) expression(["a", "c"])
   Unify: (14) expression(["a", "c"])
   Call: (15) isval(["a", "c"])
   Unify: (15) isval(["a", "c"])
   Call: (16) number(["a", "c"])
   Fail: (16) number(["a", "c"])
   Fail: (15) isval(["a", "c"])
   Redo: (14) expression(["a", "c"])
   Unify: (14) expression(["a", "c"])
   Call: (15) string(["a", "c"])
   Fail: (15) string(["a", "c"])
   Redo: (14) expression(["a", "c"])
   Unify: (14) expression(["a", "c"])
   Call: (15) atom(["a", "c"])
   Fail: (15) atom(["a", "c"])
   Redo: (14) expression(["a", "c"])
   Unify: (14) expression(["a", "c"])
^  Call: (15) not(atom(["a", "c"]))
^  Unify: (15) not(user:atom(["a", "c"]))
^  Exit: (15) not(user:atom(["a", "c"]))
   Call: (15) length(["a", "c"], _G5633)
   Unify: (15) length(["a", "c"], _G5633)
   Exit: (15) length(["a", "c"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["a", "c"])
   Unify: (15) expression2(["a", "c"])
   Call: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) expression3("a")
   Call: (16) expression2(["c"])
   Unify: (16) expression2(["c"])
   Call: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) isval("c")
   Unify: (18) isval("c")
   Call: (19) number("c")
   Fail: (19) number("c")
   Fail: (18) isval("c")
   Redo: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) string("c")
   Exit: (18) string("c")
   Exit: (17) expression3("c")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["c"])
   Exit: (15) expression2(["a", "c"])
   Exit: (14) expression(["a", "c"])
   Exit: (13) isvalstrorundef(["a", "c"])
   Call: (13) updatevar([v, b], ["a", "c"], [], _G5635)
   Unify: (13) updatevar([v, b], ["a", "c"], [], _G5635)
   Call: (14) lists:member([[v, b], empty], [])
   Fail: (14) lists:member([[v, b], empty], [])
   Redo: (13) updatevar([v, b], ["a", "c"], [], _G5635)
^  Call: (14) not(member([[v, b], _G5631], []))
^  Unify: (14) not(user:member([[v, b], _G5631], []))
^  Exit: (14) not(user:member([[v, b], _G5631], []))
   Call: (14) _G5631=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, b], ["a", "c"]]], _G5655)
   Unify: (14) lists:append([], [[[v, b], ["a", "c"]]], [[[v, b], ["a", "c"]]])
   Exit: (14) lists:append([], [[[v, b], ["a", "c"]]], [[[v, b], ["a", "c"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, b], ["a", "c"], [], [[[v, b], ["a", "c"]]])
   Exit: (12) putvalue([v, b], ["a", "c"], [], [[[v, b], ["a", "c"]]])
   Call: (12) checkarguments([["a", "b"], [v, d]], [[v, a], [v, d]], [[[v, b], ["a", "c"]]], _G5656, [], _G5658)
   Unify: (12) checkarguments([["a", "b"], [v, d]], [[v, a], [v, d]], [[[v, b], ["a", "c"]]], _G5656, [], _G5658)
   Call: (13) [["a", "b"], [v, d]]=[_G5646|_G5647]
   Exit: (13) [["a", "b"], [v, d]]=[["a", "b"], [v, d]]
   Call: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
   Call: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Fail: (14) isvalstrempty(["a", "b"])
   Redo: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
^  Call: (14) not(atom(["a", "b"]))
^  Unify: (14) not(user:atom(["a", "b"]))
^  Exit: (14) not(user:atom(["a", "b"]))
   Call: (14) length(["a", "b"], _G5662)
   Unify: (14) length(["a", "b"], _G5662)
   Exit: (14) length(["a", "b"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["a", "b"])
   Unify: (14) expressionnotatom2(["a", "b"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2(["b"])
   Unify: (15) expressionnotatom2(["b"])
   Call: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) var("b")
   Fail: (17) var("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) isvalstrempty("b")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["b"])
   Exit: (14) expressionnotatom2(["a", "b"])
   Exit: (13) expressionnotatom(["a", "b"])
   Call: (13) [[v, a], [v, d]]=[_G5654|_G5655]
   Exit: (13) [[v, a], [v, d]]=[[v, a], [v, d]]
^  Call: (13) not(var([v, a]))
^  Unify: (13) not(user:var([v, a]))
^  Exit: (13) not(user:var([v, a]))
   Call: (13) isvar([v, a])
   Unify: (13) isvar([v, a])
   Exit: (13) isvar([v, a])
   Call: (13) putvalue([v, a], ["a", "b"], [[[v, b], ["a", "c"]]], _G5672)
   Unify: (13) putvalue([v, a], ["a", "b"], [[[v, b], ["a", "c"]]], _G5672)
^  Call: (14) not(isvar([v, a]))
^  Unify: (14) not(user:isvar([v, a]))
   Call: (15) isvar([v, a])
   Unify: (15) isvar([v, a])
   Exit: (15) isvar([v, a])
^  Fail: (14) not(user:isvar([v, a]))
   Redo: (13) putvalue([v, a], ["a", "b"], [[[v, b], ["a", "c"]]], _G5672)
   Call: (14) isvar([v, a])
   Unify: (14) isvar([v, a])
   Exit: (14) isvar([v, a])
   Call: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
^  Call: (15) not(var(["a", "b"]))
^  Unify: (15) not(user:var(["a", "b"]))
^  Exit: (15) not(user:var(["a", "b"]))
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrorundef(["a", "b"])
   Unify: (14) isvalstrorundef(["a", "b"])
^  Call: (15) not(var(["a", "b"]))
^  Unify: (15) not(user:var(["a", "b"]))
^  Exit: (15) not(user:var(["a", "b"]))
   Call: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) isval(["a", "b"])
   Unify: (16) isval(["a", "b"])
   Call: (17) number(["a", "b"])
   Fail: (17) number(["a", "b"])
   Fail: (16) isval(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) string(["a", "b"])
   Fail: (16) string(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
   Call: (16) atom(["a", "b"])
   Fail: (16) atom(["a", "b"])
   Redo: (15) expression(["a", "b"])
   Unify: (15) expression(["a", "b"])
^  Call: (16) not(atom(["a", "b"]))
^  Unify: (16) not(user:atom(["a", "b"]))
^  Exit: (16) not(user:atom(["a", "b"]))
   Call: (16) length(["a", "b"], _G5680)
   Unify: (16) length(["a", "b"], _G5680)
   Exit: (16) length(["a", "b"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["a", "b"])
   Unify: (16) expression2(["a", "b"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2(["b"])
   Unify: (17) expression2(["b"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["b"])
   Exit: (16) expression2(["a", "b"])
   Exit: (15) expression(["a", "b"])
   Exit: (14) isvalstrorundef(["a", "b"])
   Call: (14) updatevar([v, a], ["a", "b"], [[[v, b], ["a", "c"]]], _G5682)
   Unify: (14) updatevar([v, a], ["a", "b"], [[[v, b], ["a", "c"]]], _G5682)
   Call: (15) lists:member([[v, a], empty], [[[v, b], ["a", "c"]]])
   Unify: (15) lists:member([[v, a], empty], [[[v, b], ["a", "c"]]])
   Fail: (15) lists:member([[v, a], empty], [[[v, b], ["a", "c"]]])
   Redo: (14) updatevar([v, a], ["a", "b"], [[[v, b], ["a", "c"]]], _G5682)
^  Call: (15) not(member([[v, a], _G5678], [[[v, b], ["a", "c"]]]))
^  Unify: (15) not(user:member([[v, a], _G5678], [[[v, b], ["a", "c"]]]))
^  Exit: (15) not(user:member([[v, a], _G5678], [[[v, b], ["a", "c"]]]))
   Call: (15) _G5678=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, b], ["a", "c"]]], [[[v, a], ["a", "b"]]], _G5702)
   Unify: (15) lists:append([[[v, b], ["a", "c"]]], [[[v, a], ["a", "b"]]], [[[v, b], ["a", "c"]]|_G5694])
   Exit: (15) lists:append([[[v, b], ["a", "c"]]], [[[v, a], ["a", "b"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, a], ["a", "b"], [[[v, b], ["a", "c"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Exit: (13) putvalue([v, a], ["a", "b"], [[[v, b], ["a", "c"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5712)
   Unify: (15) length([v, d], _G5712)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5704|_G5705]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5720)
   Unify: (15) length([v, d], _G5720)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5704|_G5705]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5720, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Unify: (14) getvalue([v, d], _G5720, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5720, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5719)
   Unify: (15) isvalstrorundef(_G5719)
   Call: (16) var(_G5719)
   Exit: (16) var(_G5719)
   Exit: (15) isvalstrorundef(_G5719)
   Call: (15) getvar([v, d], _G5720, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Unify: (15) getvar([v, d], _G5720, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Call: (16) lists:member([[v, d], _G5715], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Unify: (16) lists:member([[v, d], _G5715], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Fail: (16) lists:member([[v, d], _G5715], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Redo: (15) getvar([v, d], _G5720, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Unify: (15) getvar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
^  Call: (16) not(member([[v, d], _G5718], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]]))
^  Unify: (16) not(user:member([[v, d], _G5718], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]]))
^  Exit: (16) not(user:member([[v, d], _G5718], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5734)
   Unify: (14) putvalue([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5734)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5734)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5739)
   Unify: (15) updatevar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5739)
   Call: (16) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], _G5739)
^  Call: (16) not(member([[v, d], _G5735], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]]))
^  Unify: (16) not(user:member([[v, d], _G5735], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]]))
^  Exit: (16) not(user:member([[v, d], _G5735], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]]))
   Call: (16) _G5735=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, d], empty]], _G5759)
   Unify: (16) lists:append([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, d], empty]], [[[v, b], ["a", "c"]]|_G5751])
   Exit: (16) lists:append([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5774)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[v, d], [v, d]]], _G5777)
   Unify: (14) checkarguments([], [], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["a", "b"], [v, d]], [[v, a], [v, d]], [[[v, b], ["a", "c"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["a", "c"], ["a", "b"], [v, d]], [[v, b], [v, a], [v, d]], [], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, b]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, b]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, b]]]]=[_G5765|_G5766]
   Exit: (12) [[[n, =], [[v, d], [v, b]]]]=[[[n, =], [[v, d], [v, b]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, b]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, b]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
   Call: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, b]]]=[_G5773|_G5774]
   Exit: (13) [[n, =], [[v, d], [v, b]]]=[[n, =], [[v, d], [v, b]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, b]]]=[[not, [_G5782]]|_G5774]
   Fail: (13) [[n, =], [[v, d], [v, b]]]=[[not, [_G5782]]|_G5774]
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, b]]]=[[_G5776], or, [_G5785]]
   Fail: (13) [[n, =], [[v, d], [v, b]]]=[[_G5776], or, [_G5785]]
   Redo: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, b]]]=[_G5773|_G5774]
   Exit: (13) [[n, =], [[v, d], [v, b]]]=[[n, =], [[v, d], [v, b]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, b]]], _G5785)
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, b]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, b]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, b]]]]=[[not, [_G5774]]|_G5766]
   Fail: (12) [[[n, =], [[v, d], [v, b]]]]=[[not, [_G5774]]|_G5766]
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, b]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, b]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, b]]]]=[[_G5768], or, [_G5777]]
   Fail: (12) [[[n, =], [[v, d], [v, b]]]]=[[_G5768], or, [_G5777]]
   Redo: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, b]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, b]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, b]]]]=[_G5765|_G5766]
   Exit: (12) [[[n, =], [[v, d], [v, b]]]]=[[[n, =], [[v, d], [v, b]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, b]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, b]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, b]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, b]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5784, _G5785, _G5786)
   Unify: (12) interpretstatement1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, b]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5784, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5784)
   Unify: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5784)
   Call: (14) getvalues([v, d], [v, b], _G5782, _G5783, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, b], _G5782, _G5783, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5781, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5781, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5781, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5780)
   Unify: (16) isvalstrorundef(_G5780)
   Call: (17) var(_G5780)
   Exit: (17) var(_G5780)
   Exit: (16) isvalstrorundef(_G5780)
   Call: (16) getvar([v, d], _G5781, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5781, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5776], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5776], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5781, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5779], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5779], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5779], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (15) getvalue([v, b], _G5787, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (15) getvalue([v, b], _G5787, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, b]))
^  Unify: (16) not(user:isvar([v, b]))
   Call: (17) isvar([v, b])
   Unify: (17) isvar([v, b])
   Exit: (17) isvar([v, b])
^  Fail: (16) not(user:isvar([v, b]))
   Redo: (15) getvalue([v, b], _G5787, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (16) isvar([v, b])
   Unify: (16) isvar([v, b])
   Exit: (16) isvar([v, b])
   Call: (16) isvalstrorundef(_G5786)
   Unify: (16) isvalstrorundef(_G5786)
   Call: (17) var(_G5786)
   Exit: (17) var(_G5786)
   Exit: (16) isvalstrorundef(_G5786)
   Call: (16) getvar([v, b], _G5787, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (16) getvar([v, b], _G5787, [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (17) lists:member([[v, b], _G5782], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, b], _G5782], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, b], ["a", "c"]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
^  Call: (17) not(["a", "c"]=empty)
^  Unify: (17) not(user: (["a", "c"]=empty))
^  Exit: (17) not(user: (["a", "c"]=empty))
   Exit: (16) getvar([v, b], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (15) getvalue([v, b], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, b], empty, ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["a", "c"])
   Unify: (14) expression(["a", "c"])
   Call: (15) isval(["a", "c"])
   Unify: (15) isval(["a", "c"])
   Call: (16) number(["a", "c"])
   Fail: (16) number(["a", "c"])
   Fail: (15) isval(["a", "c"])
   Redo: (14) expression(["a", "c"])
   Unify: (14) expression(["a", "c"])
   Call: (15) string(["a", "c"])
   Fail: (15) string(["a", "c"])
   Redo: (14) expression(["a", "c"])
   Unify: (14) expression(["a", "c"])
   Call: (15) atom(["a", "c"])
   Fail: (15) atom(["a", "c"])
   Redo: (14) expression(["a", "c"])
   Unify: (14) expression(["a", "c"])
^  Call: (15) not(atom(["a", "c"]))
^  Unify: (15) not(user:atom(["a", "c"]))
^  Exit: (15) not(user:atom(["a", "c"]))
   Call: (15) length(["a", "c"], _G5804)
   Unify: (15) length(["a", "c"], _G5804)
   Exit: (15) length(["a", "c"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["a", "c"])
   Unify: (15) expression2(["a", "c"])
   Call: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) expression3("a")
   Call: (16) expression2(["c"])
   Unify: (16) expression2(["c"])
   Call: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) isval("c")
   Unify: (18) isval("c")
   Call: (19) number("c")
   Fail: (19) number("c")
   Fail: (18) isval("c")
   Redo: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) string("c")
   Exit: (18) string("c")
   Exit: (17) expression3("c")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["c"])
   Exit: (15) expression2(["a", "c"])
   Exit: (14) expression(["a", "c"])
   Call: (14) val1emptyorvalsequal(empty, ["a", "c"])
   Unify: (14) val1emptyorvalsequal(empty, ["a", "c"])
   Exit: (14) val1emptyorvalsequal(empty, ["a", "c"])
   Call: (14) putvalue([v, d], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5806)
   Unify: (14) putvalue([v, d], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5806)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5806)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["a", "c"])
   Unify: (15) isvalstrorundef(["a", "c"])
   Call: (16) var(["a", "c"])
   Fail: (16) var(["a", "c"])
   Redo: (15) isvalstrorundef(["a", "c"])
   Unify: (15) isvalstrorundef(["a", "c"])
^  Call: (16) not(var(["a", "c"]))
^  Unify: (16) not(user:var(["a", "c"]))
^  Exit: (16) not(user:var(["a", "c"]))
   Call: (16) isval(["a", "c"])
   Unify: (16) isval(["a", "c"])
   Call: (17) number(["a", "c"])
   Fail: (17) number(["a", "c"])
   Fail: (16) isval(["a", "c"])
   Redo: (15) isvalstrorundef(["a", "c"])
   Unify: (15) isvalstrorundef(["a", "c"])
^  Call: (16) not(var(["a", "c"]))
^  Unify: (16) not(user:var(["a", "c"]))
^  Exit: (16) not(user:var(["a", "c"]))
   Call: (16) expression(["a", "c"])
   Unify: (16) expression(["a", "c"])
   Call: (17) isval(["a", "c"])
   Unify: (17) isval(["a", "c"])
   Call: (18) number(["a", "c"])
   Fail: (18) number(["a", "c"])
   Fail: (17) isval(["a", "c"])
   Redo: (16) expression(["a", "c"])
   Unify: (16) expression(["a", "c"])
   Call: (17) string(["a", "c"])
   Fail: (17) string(["a", "c"])
   Redo: (16) expression(["a", "c"])
   Unify: (16) expression(["a", "c"])
   Call: (17) atom(["a", "c"])
   Fail: (17) atom(["a", "c"])
   Redo: (16) expression(["a", "c"])
   Unify: (16) expression(["a", "c"])
^  Call: (17) not(atom(["a", "c"]))
^  Unify: (17) not(user:atom(["a", "c"]))
^  Exit: (17) not(user:atom(["a", "c"]))
   Call: (17) length(["a", "c"], _G5814)
   Unify: (17) length(["a", "c"], _G5814)
   Exit: (17) length(["a", "c"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["a", "c"])
   Unify: (17) expression2(["a", "c"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2(["c"])
   Unify: (18) expression2(["c"])
   Call: (19) expression3("c")
   Unify: (19) expression3("c")
   Call: (20) isval("c")
   Unify: (20) isval("c")
   Call: (21) number("c")
   Fail: (21) number("c")
   Fail: (20) isval("c")
   Redo: (19) expression3("c")
   Unify: (19) expression3("c")
   Call: (20) string("c")
   Exit: (20) string("c")
   Exit: (19) expression3("c")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["c"])
   Exit: (17) expression2(["a", "c"])
   Exit: (16) expression(["a", "c"])
   Exit: (15) isvalstrorundef(["a", "c"])
   Call: (15) updatevar([v, d], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5816)
   Unify: (15) updatevar([v, d], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], _G5816)
   Call: (16) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[v, d], empty], _G5827)
   Unify: (16) lists:delete([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[v, d], empty], _G5827)
   Exit: (16) lists:delete([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[v, d], empty], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]])
   Call: (16) lists:append([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, d], ["a", "c"]]], _G5842)
   Unify: (16) lists:append([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, d], ["a", "c"]]], [[[v, b], ["a", "c"]]|_G5834])
   Exit: (16) lists:append([[[v, b], ["a", "c"]], [[v, a], ["a", "b"]]], [[[v, d], ["a", "c"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Exit: (14) putvalue([v, d], ["a", "c"], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, b], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, b]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5852=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], _G5855, [], _G5857)
   Unify: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], empty]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [[[n, =], [[v, d], [v, b]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [], _G5855)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [], _G5855)
   Call: (12) [[[v, d], [v, d]]]=[[_G5848, _G5851]|_G5846]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5867)
   Unify: (13) length([v, d], _G5867)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [], _G5864)
   Call: (12) lists:member([[v, d], _G5857], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Unify: (12) lists:member([[v, d], _G5857], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Exit: (12) lists:member([[v, d], ["a", "c"]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]])
   Call: (12) lists:append([], [[[v, d], ["a", "c"]]], _G5878)
   Unify: (12) lists:append([], [[[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]])
   Exit: (12) lists:append([], [[[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]])
   Call: (12) updatevars([], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]], _G5879)
   Unify: (12) updatevars([], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]])
   Exit: (12) updatevars([], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, b], ["a", "c"]], [[v, a], ["a", "b"]], [[v, d], ["a", "c"]]], [], [[[v, d], ["a", "c"]]])
^  Call: (11) not([[[v, d], ["a", "c"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["a", "c"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["a", "c"]]]=[]))
   Call: (11) unique1([[[v, d], ["a", "c"]]], [], _G15)
   Unify: (11) unique1([[[v, d], ["a", "c"]]], [], _G15)
   Call: (12) lists:delete([], [[v, d], ["a", "c"]], _G5884)
   Unify: (12) lists:delete([], [[v, d], ["a", "c"]], [])
   Exit: (12) lists:delete([], [[v, d], ["a", "c"]], [])
   Call: (12) lists:append([], [[[v, d], ["a", "c"]]], _G5887)
   Unify: (12) lists:append([], [[[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]])
   Exit: (12) lists:append([], [[[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]])
   Call: (12) unique1([], [[[v, d], ["a", "c"]]], _G15)
   Unify: (12) unique1([], [[[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]])
   Exit: (12) unique1([], [[[v, d], ["a", "c"]]], [[[v, d], ["a", "c"]]])
   Exit: (11) unique1([[[v, d], ["a", "c"]]], [], [[[v, d], ["a", "c"]]])
   Call: (11) findresult3([["a", "c"], ["a", "b"], [v, d]], [[[v, d], ["a", "c"]]], [], _G5888)
   Unify: (11) findresult3([["a", "c"], ["a", "b"], [v, d]], [[[v, d], ["a", "c"]]], [], _G5888)
   Call: (12) [["a", "c"], ["a", "b"], [v, d]]=[_G5878|_G5879]
   Exit: (12) [["a", "c"], ["a", "b"], [v, d]]=[["a", "c"], ["a", "b"], [v, d]]
   Call: (12) expressionnotatom(["a", "c"])
   Unify: (12) expressionnotatom(["a", "c"])
   Call: (13) isvalstrempty(["a", "c"])
   Unify: (13) isvalstrempty(["a", "c"])
   Call: (14) var(["a", "c"])
   Fail: (14) var(["a", "c"])
   Redo: (13) isvalstrempty(["a", "c"])
   Unify: (13) isvalstrempty(["a", "c"])
   Call: (14) isval(["a", "c"])
   Unify: (14) isval(["a", "c"])
   Call: (15) number(["a", "c"])
   Fail: (15) number(["a", "c"])
   Fail: (14) isval(["a", "c"])
   Redo: (13) isvalstrempty(["a", "c"])
   Unify: (13) isvalstrempty(["a", "c"])
   Call: (14) string(["a", "c"])
   Fail: (14) string(["a", "c"])
   Fail: (13) isvalstrempty(["a", "c"])
   Redo: (12) expressionnotatom(["a", "c"])
   Unify: (12) expressionnotatom(["a", "c"])
^  Call: (13) not(atom(["a", "c"]))
^  Unify: (13) not(user:atom(["a", "c"]))
^  Exit: (13) not(user:atom(["a", "c"]))
   Call: (13) length(["a", "c"], _G5894)
   Unify: (13) length(["a", "c"], _G5894)
   Exit: (13) length(["a", "c"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["a", "c"])
   Unify: (13) expressionnotatom2(["a", "c"])
   Call: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) var("a")
   Fail: (15) var("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) isval("a")
   Unify: (15) isval("a")
   Call: (16) number("a")
   Fail: (16) number("a")
   Fail: (15) isval("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) string("a")
   Exit: (15) string("a")
   Exit: (14) isvalstrempty("a")
   Call: (14) expressionnotatom2(["c"])
   Unify: (14) expressionnotatom2(["c"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["c"])
   Exit: (13) expressionnotatom2(["a", "c"])
   Exit: (12) expressionnotatom(["a", "c"])
   Call: (12) lists:append([], [["a", "c"]], _G5898)
   Unify: (12) lists:append([], [["a", "c"]], [["a", "c"]])
   Exit: (12) lists:append([], [["a", "c"]], [["a", "c"]])
   Call: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["a", "c"]]], [["a", "c"]], _G5899)
   Unify: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["a", "c"]]], [["a", "c"]], _G5899)
   Call: (13) [["a", "b"], [v, d]]=[_G5889|_G5890]
   Exit: (13) [["a", "b"], [v, d]]=[["a", "b"], [v, d]]
   Call: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
   Call: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) var(["a", "b"])
   Fail: (15) var(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) isvalstrempty(["a", "b"])
   Unify: (14) isvalstrempty(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Fail: (14) isvalstrempty(["a", "b"])
   Redo: (13) expressionnotatom(["a", "b"])
   Unify: (13) expressionnotatom(["a", "b"])
^  Call: (14) not(atom(["a", "b"]))
^  Unify: (14) not(user:atom(["a", "b"]))
^  Exit: (14) not(user:atom(["a", "b"]))
   Call: (14) length(["a", "b"], _G5905)
   Unify: (14) length(["a", "b"], _G5905)
   Exit: (14) length(["a", "b"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["a", "b"])
   Unify: (14) expressionnotatom2(["a", "b"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2(["b"])
   Unify: (15) expressionnotatom2(["b"])
   Call: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) var("b")
   Fail: (17) var("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) isvalstrempty("b")
   Unify: (16) isvalstrempty("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) isvalstrempty("b")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["b"])
   Exit: (14) expressionnotatom2(["a", "b"])
   Exit: (13) expressionnotatom(["a", "b"])
   Call: (13) lists:append([["a", "c"]], [["a", "b"]], _G5909)
   Unify: (13) lists:append([["a", "c"]], [["a", "b"]], [["a", "c"]|_G5901])
   Exit: (13) lists:append([["a", "c"]], [["a", "b"]], [["a", "c"], ["a", "b"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["a", "c"]]], [["a", "c"], ["a", "b"]], _G5913)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["a", "c"]]], [["a", "c"], ["a", "b"]], _G5913)
   Call: (14) [[v, d]]=[_G5903|_G5904]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5919)
   Unify: (15) length([v, d], _G5919)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["a", "c"]]], [["a", "c"], ["a", "b"]], _G5913)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["a", "c"]]], [["a", "c"], ["a", "b"]], _G5913)
   Call: (14) [[v, d]]=[_G5903|_G5904]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5909], [[[v, d], ["a", "c"]]])
   Unify: (14) lists:member([[v, d], _G5909], [[[v, d], ["a", "c"]]])
   Exit: (14) lists:member([[v, d], ["a", "c"]], [[[v, d], ["a", "c"]]])
   Call: (14) lists:append([["a", "c"], ["a", "b"]], [["a", "c"]], _G5924)
   Unify: (14) lists:append([["a", "c"], ["a", "b"]], [["a", "c"]], [["a", "c"]|_G5916])
   Exit: (14) lists:append([["a", "c"], ["a", "b"]], [["a", "c"]], [["a", "c"], ["a", "b"], ["a", "c"]])
   Call: (14) findresult3([], [[[v, d], ["a", "c"]]], [["a", "c"], ["a", "b"], ["a", "c"]], _G5931)
   Unify: (14) findresult3([], [[[v, d], ["a", "c"]]], [["a", "c"], ["a", "b"], ["a", "c"]], [["a", "c"], ["a", "b"], ["a", "c"]])
   Exit: (14) findresult3([], [[[v, d], ["a", "c"]]], [["a", "c"], ["a", "b"], ["a", "c"]], [["a", "c"], ["a", "b"], ["a", "c"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["a", "c"]]], [["a", "c"], ["a", "b"]], [["a", "c"], ["a", "b"], ["a", "c"]])
   Exit: (12) findresult3([["a", "b"], [v, d]], [[[v, d], ["a", "c"]]], [["a", "c"]], [["a", "c"], ["a", "b"], ["a", "c"]])
   Exit: (11) findresult3([["a", "c"], ["a", "b"], [v, d]], [[[v, d], ["a", "c"]]], [], [["a", "c"], ["a", "b"], ["a", "c"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "c"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "c"]]])
   Exit: (9) interpret1(off, [[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "c"]]])
   Exit: (8) interpret(off, [[n, f], [["a", "c"], ["a", "b"], [v, d]]], [[[n, f], [[v, b], [v, a], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "c"]]])

   Call: (8) interpret(off, [[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (8) interpret(off, [[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5543|_G5544]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], _G5555, "->", _G5564]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], _G5555, "->", _G5564]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555, [], _G5557)
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], "->", _G5561]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], "->", _G5561]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5543|_G5544]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5546, _G5549, ":-", _G5558]
   Exit: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], _G5573)
   Unify: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5573, [], _G5575)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], _G5573)
   Unify: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]|_G5565])
   Exit: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (9) interpret1(off, [[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
^  Call: (10) retractall(debug(_G5567))
^  Exit: (10) retractall(debug(_G5567))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5571))
^  Exit: (10) retractall(cut(_G5571))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (10) member1([[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["a", "b"], ["b", "c"], [v, d]]]=[_G5575, _G5578]
   Exit: (11) [[n, f], [["a", "b"], ["b", "c"], [v, d]]]=[[n, f], [["a", "b"], ["b", "c"], [v, d]]]
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5587, ":-", _G5596]|_G5582]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["a", "b"], ["b", "c"], [v, d]], _G5607)
   Unify: (11) length([["a", "b"], ["b", "c"], [v, d]], _G5607)
   Exit: (11) length([["a", "b"], ["b", "c"], [v, d]], 3)
   Call: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Exit: (11) length([[v, c], [v, b], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) checkarguments([["a", "b"], ["b", "c"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5609, [], _G5611)
   Unify: (11) checkarguments([["a", "b"], ["b", "c"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5609, [], _G5611)
   Call: (12) [["a", "b"], ["b", "c"], [v, d]]=[_G5599|_G5600]
   Exit: (12) [["a", "b"], ["b", "c"], [v, d]]=[["a", "b"], ["b", "c"], [v, d]]
   Call: (12) expressionnotatom(["a", "b"])
   Unify: (12) expressionnotatom(["a", "b"])
   Call: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) var(["a", "b"])
   Fail: (14) var(["a", "b"])
   Redo: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) isval(["a", "b"])
   Unify: (14) isval(["a", "b"])
   Call: (15) number(["a", "b"])
   Fail: (15) number(["a", "b"])
   Fail: (14) isval(["a", "b"])
   Redo: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) string(["a", "b"])
   Fail: (14) string(["a", "b"])
   Fail: (13) isvalstrempty(["a", "b"])
   Redo: (12) expressionnotatom(["a", "b"])
   Unify: (12) expressionnotatom(["a", "b"])
^  Call: (13) not(atom(["a", "b"]))
^  Unify: (13) not(user:atom(["a", "b"]))
^  Exit: (13) not(user:atom(["a", "b"]))
   Call: (13) length(["a", "b"], _G5615)
   Unify: (13) length(["a", "b"], _G5615)
   Exit: (13) length(["a", "b"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["a", "b"])
   Unify: (13) expressionnotatom2(["a", "b"])
   Call: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) var("a")
   Fail: (15) var("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) isval("a")
   Unify: (15) isval("a")
   Call: (16) number("a")
   Fail: (16) number("a")
   Fail: (15) isval("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) string("a")
   Exit: (15) string("a")
   Exit: (14) isvalstrempty("a")
   Call: (14) expressionnotatom2(["b"])
   Unify: (14) expressionnotatom2(["b"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["b"])
   Exit: (13) expressionnotatom2(["a", "b"])
   Exit: (12) expressionnotatom(["a", "b"])
   Call: (12) [[v, c], [v, b], [v, d]]=[_G5607|_G5608]
   Exit: (12) [[v, c], [v, b], [v, d]]=[[v, c], [v, b], [v, d]]
^  Call: (12) not(var([v, c]))
^  Unify: (12) not(user:var([v, c]))
^  Exit: (12) not(user:var([v, c]))
   Call: (12) isvar([v, c])
   Unify: (12) isvar([v, c])
   Exit: (12) isvar([v, c])
   Call: (12) putvalue([v, c], ["a", "b"], [], _G5625)
   Unify: (12) putvalue([v, c], ["a", "b"], [], _G5625)
^  Call: (13) not(isvar([v, c]))
^  Unify: (13) not(user:isvar([v, c]))
   Call: (14) isvar([v, c])
   Unify: (14) isvar([v, c])
   Exit: (14) isvar([v, c])
^  Fail: (13) not(user:isvar([v, c]))
   Redo: (12) putvalue([v, c], ["a", "b"], [], _G5625)
   Call: (13) isvar([v, c])
   Unify: (13) isvar([v, c])
   Exit: (13) isvar([v, c])
   Call: (13) isvalstrorundef(["a", "b"])
   Unify: (13) isvalstrorundef(["a", "b"])
   Call: (14) var(["a", "b"])
   Fail: (14) var(["a", "b"])
   Redo: (13) isvalstrorundef(["a", "b"])
   Unify: (13) isvalstrorundef(["a", "b"])
^  Call: (14) not(var(["a", "b"]))
^  Unify: (14) not(user:var(["a", "b"]))
^  Exit: (14) not(user:var(["a", "b"]))
   Call: (14) isval(["a", "b"])
   Unify: (14) isval(["a", "b"])
   Call: (15) number(["a", "b"])
   Fail: (15) number(["a", "b"])
   Fail: (14) isval(["a", "b"])
   Redo: (13) isvalstrorundef(["a", "b"])
   Unify: (13) isvalstrorundef(["a", "b"])
^  Call: (14) not(var(["a", "b"]))
^  Unify: (14) not(user:var(["a", "b"]))
^  Exit: (14) not(user:var(["a", "b"]))
   Call: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) atom(["a", "b"])
   Fail: (15) atom(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
^  Call: (15) not(atom(["a", "b"]))
^  Unify: (15) not(user:atom(["a", "b"]))
^  Exit: (15) not(user:atom(["a", "b"]))
   Call: (15) length(["a", "b"], _G5633)
   Unify: (15) length(["a", "b"], _G5633)
   Exit: (15) length(["a", "b"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["a", "b"])
   Unify: (15) expression2(["a", "b"])
   Call: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) expression3("a")
   Call: (16) expression2(["b"])
   Unify: (16) expression2(["b"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["b"])
   Exit: (15) expression2(["a", "b"])
   Exit: (14) expression(["a", "b"])
   Exit: (13) isvalstrorundef(["a", "b"])
   Call: (13) updatevar([v, c], ["a", "b"], [], _G5635)
   Unify: (13) updatevar([v, c], ["a", "b"], [], _G5635)
   Call: (14) lists:member([[v, c], empty], [])
   Fail: (14) lists:member([[v, c], empty], [])
   Redo: (13) updatevar([v, c], ["a", "b"], [], _G5635)
^  Call: (14) not(member([[v, c], _G5631], []))
^  Unify: (14) not(user:member([[v, c], _G5631], []))
^  Exit: (14) not(user:member([[v, c], _G5631], []))
   Call: (14) _G5631=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, c], ["a", "b"]]], _G5655)
   Unify: (14) lists:append([], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]]])
   Exit: (14) lists:append([], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, c], ["a", "b"], [], [[[v, c], ["a", "b"]]])
   Exit: (12) putvalue([v, c], ["a", "b"], [], [[[v, c], ["a", "b"]]])
   Call: (12) checkarguments([["b", "c"], [v, d]], [[v, b], [v, d]], [[[v, c], ["a", "b"]]], _G5656, [], _G5658)
   Unify: (12) checkarguments([["b", "c"], [v, d]], [[v, b], [v, d]], [[[v, c], ["a", "b"]]], _G5656, [], _G5658)
   Call: (13) [["b", "c"], [v, d]]=[_G5646|_G5647]
   Exit: (13) [["b", "c"], [v, d]]=[["b", "c"], [v, d]]
   Call: (13) expressionnotatom(["b", "c"])
   Unify: (13) expressionnotatom(["b", "c"])
   Call: (14) isvalstrempty(["b", "c"])
   Unify: (14) isvalstrempty(["b", "c"])
   Call: (15) var(["b", "c"])
   Fail: (15) var(["b", "c"])
   Redo: (14) isvalstrempty(["b", "c"])
   Unify: (14) isvalstrempty(["b", "c"])
   Call: (15) isval(["b", "c"])
   Unify: (15) isval(["b", "c"])
   Call: (16) number(["b", "c"])
   Fail: (16) number(["b", "c"])
   Fail: (15) isval(["b", "c"])
   Redo: (14) isvalstrempty(["b", "c"])
   Unify: (14) isvalstrempty(["b", "c"])
   Call: (15) string(["b", "c"])
   Fail: (15) string(["b", "c"])
   Fail: (14) isvalstrempty(["b", "c"])
   Redo: (13) expressionnotatom(["b", "c"])
   Unify: (13) expressionnotatom(["b", "c"])
^  Call: (14) not(atom(["b", "c"]))
^  Unify: (14) not(user:atom(["b", "c"]))
^  Exit: (14) not(user:atom(["b", "c"]))
   Call: (14) length(["b", "c"], _G5662)
   Unify: (14) length(["b", "c"], _G5662)
   Exit: (14) length(["b", "c"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "c"])
   Unify: (14) expressionnotatom2(["b", "c"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["c"])
   Unify: (15) expressionnotatom2(["c"])
   Call: (16) isvalstrempty("c")
   Unify: (16) isvalstrempty("c")
   Call: (17) var("c")
   Fail: (17) var("c")
   Redo: (16) isvalstrempty("c")
   Unify: (16) isvalstrempty("c")
   Call: (17) isval("c")
   Unify: (17) isval("c")
   Call: (18) number("c")
   Fail: (18) number("c")
   Fail: (17) isval("c")
   Redo: (16) isvalstrempty("c")
   Unify: (16) isvalstrempty("c")
   Call: (17) string("c")
   Exit: (17) string("c")
   Exit: (16) isvalstrempty("c")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["c"])
   Exit: (14) expressionnotatom2(["b", "c"])
   Exit: (13) expressionnotatom(["b", "c"])
   Call: (13) [[v, b], [v, d]]=[_G5654|_G5655]
   Exit: (13) [[v, b], [v, d]]=[[v, b], [v, d]]
^  Call: (13) not(var([v, b]))
^  Unify: (13) not(user:var([v, b]))
^  Exit: (13) not(user:var([v, b]))
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) putvalue([v, b], ["b", "c"], [[[v, c], ["a", "b"]]], _G5672)
   Unify: (13) putvalue([v, b], ["b", "c"], [[[v, c], ["a", "b"]]], _G5672)
^  Call: (14) not(isvar([v, b]))
^  Unify: (14) not(user:isvar([v, b]))
   Call: (15) isvar([v, b])
   Unify: (15) isvar([v, b])
   Exit: (15) isvar([v, b])
^  Fail: (14) not(user:isvar([v, b]))
   Redo: (13) putvalue([v, b], ["b", "c"], [[[v, c], ["a", "b"]]], _G5672)
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
   Call: (14) isvalstrorundef(["b", "c"])
   Unify: (14) isvalstrorundef(["b", "c"])
   Call: (15) var(["b", "c"])
   Fail: (15) var(["b", "c"])
   Redo: (14) isvalstrorundef(["b", "c"])
   Unify: (14) isvalstrorundef(["b", "c"])
^  Call: (15) not(var(["b", "c"]))
^  Unify: (15) not(user:var(["b", "c"]))
^  Exit: (15) not(user:var(["b", "c"]))
   Call: (15) isval(["b", "c"])
   Unify: (15) isval(["b", "c"])
   Call: (16) number(["b", "c"])
   Fail: (16) number(["b", "c"])
   Fail: (15) isval(["b", "c"])
   Redo: (14) isvalstrorundef(["b", "c"])
   Unify: (14) isvalstrorundef(["b", "c"])
^  Call: (15) not(var(["b", "c"]))
^  Unify: (15) not(user:var(["b", "c"]))
^  Exit: (15) not(user:var(["b", "c"]))
   Call: (15) expression(["b", "c"])
   Unify: (15) expression(["b", "c"])
   Call: (16) isval(["b", "c"])
   Unify: (16) isval(["b", "c"])
   Call: (17) number(["b", "c"])
   Fail: (17) number(["b", "c"])
   Fail: (16) isval(["b", "c"])
   Redo: (15) expression(["b", "c"])
   Unify: (15) expression(["b", "c"])
   Call: (16) string(["b", "c"])
   Fail: (16) string(["b", "c"])
   Redo: (15) expression(["b", "c"])
   Unify: (15) expression(["b", "c"])
   Call: (16) atom(["b", "c"])
   Fail: (16) atom(["b", "c"])
   Redo: (15) expression(["b", "c"])
   Unify: (15) expression(["b", "c"])
^  Call: (16) not(atom(["b", "c"]))
^  Unify: (16) not(user:atom(["b", "c"]))
^  Exit: (16) not(user:atom(["b", "c"]))
   Call: (16) length(["b", "c"], _G5680)
   Unify: (16) length(["b", "c"], _G5680)
   Exit: (16) length(["b", "c"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["b", "c"])
   Unify: (16) expression2(["b", "c"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2(["c"])
   Unify: (17) expression2(["c"])
   Call: (18) expression3("c")
   Unify: (18) expression3("c")
   Call: (19) isval("c")
   Unify: (19) isval("c")
   Call: (20) number("c")
   Fail: (20) number("c")
   Fail: (19) isval("c")
   Redo: (18) expression3("c")
   Unify: (18) expression3("c")
   Call: (19) string("c")
   Exit: (19) string("c")
   Exit: (18) expression3("c")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["c"])
   Exit: (16) expression2(["b", "c"])
   Exit: (15) expression(["b", "c"])
   Exit: (14) isvalstrorundef(["b", "c"])
   Call: (14) updatevar([v, b], ["b", "c"], [[[v, c], ["a", "b"]]], _G5682)
   Unify: (14) updatevar([v, b], ["b", "c"], [[[v, c], ["a", "b"]]], _G5682)
   Call: (15) lists:member([[v, b], empty], [[[v, c], ["a", "b"]]])
   Unify: (15) lists:member([[v, b], empty], [[[v, c], ["a", "b"]]])
   Fail: (15) lists:member([[v, b], empty], [[[v, c], ["a", "b"]]])
   Redo: (14) updatevar([v, b], ["b", "c"], [[[v, c], ["a", "b"]]], _G5682)
^  Call: (15) not(member([[v, b], _G5678], [[[v, c], ["a", "b"]]]))
^  Unify: (15) not(user:member([[v, b], _G5678], [[[v, c], ["a", "b"]]]))
^  Exit: (15) not(user:member([[v, b], _G5678], [[[v, c], ["a", "b"]]]))
   Call: (15) _G5678=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, c], ["a", "b"]]], [[[v, b], ["b", "c"]]], _G5702)
   Unify: (15) lists:append([[[v, c], ["a", "b"]]], [[[v, b], ["b", "c"]]], [[[v, c], ["a", "b"]]|_G5694])
   Exit: (15) lists:append([[[v, c], ["a", "b"]]], [[[v, b], ["b", "c"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, b], ["b", "c"], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Exit: (13) putvalue([v, b], ["b", "c"], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5712)
   Unify: (15) length([v, d], _G5712)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5704|_G5705]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5720)
   Unify: (15) length([v, d], _G5720)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5704|_G5705]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5720, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Unify: (14) getvalue([v, d], _G5720, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5720, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5719)
   Unify: (15) isvalstrorundef(_G5719)
   Call: (16) var(_G5719)
   Exit: (16) var(_G5719)
   Exit: (15) isvalstrorundef(_G5719)
   Call: (15) getvar([v, d], _G5720, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Unify: (15) getvar([v, d], _G5720, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Call: (16) lists:member([[v, d], _G5715], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Unify: (16) lists:member([[v, d], _G5715], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Fail: (16) lists:member([[v, d], _G5715], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Redo: (15) getvar([v, d], _G5720, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Unify: (15) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
^  Call: (16) not(member([[v, d], _G5718], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]]))
^  Unify: (16) not(user:member([[v, d], _G5718], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]]))
^  Exit: (16) not(user:member([[v, d], _G5718], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5734)
   Unify: (14) putvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5734)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5734)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5739)
   Unify: (15) updatevar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5739)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], _G5739)
^  Call: (16) not(member([[v, d], _G5735], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]]))
^  Unify: (16) not(user:member([[v, d], _G5735], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]]))
^  Exit: (16) not(user:member([[v, d], _G5735], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]]))
   Call: (16) _G5735=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, d], empty]], _G5759)
   Unify: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, d], empty]], [[[v, c], ["a", "b"]]|_G5751])
   Exit: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5774)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[v, d], [v, d]]], _G5777)
   Unify: (14) checkarguments([], [], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["b", "c"], [v, d]], [[v, b], [v, d]], [[[v, c], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["a", "b"], ["b", "c"], [v, d]], [[v, c], [v, b], [v, d]], [], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5765|_G5766]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5773|_G5774]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5782]]|_G5774]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5782]]|_G5774]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[_G5776], or, [_G5785]]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[_G5776], or, [_G5785]]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5773|_G5774]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5774]]|_G5766]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5774]]|_G5766]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5768], or, [_G5777]]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5768], or, [_G5777]]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5765|_G5766]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5784, _G5785, _G5786)
   Unify: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5784, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5784)
   Unify: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5784)
   Call: (14) getvalues([v, d], [v, c], _G5782, _G5783, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, c], _G5782, _G5783, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5781, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5781, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5781, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5780)
   Unify: (16) isvalstrorundef(_G5780)
   Call: (17) var(_G5780)
   Exit: (17) var(_G5780)
   Exit: (16) isvalstrorundef(_G5780)
   Call: (16) getvar([v, d], _G5781, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5781, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5776], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5776], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5781, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5779], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5779], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5779], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (15) getvalue([v, c], _G5787, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (15) getvalue([v, c], _G5787, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, c]))
^  Unify: (16) not(user:isvar([v, c]))
   Call: (17) isvar([v, c])
   Unify: (17) isvar([v, c])
   Exit: (17) isvar([v, c])
^  Fail: (16) not(user:isvar([v, c]))
   Redo: (15) getvalue([v, c], _G5787, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (16) isvar([v, c])
   Unify: (16) isvar([v, c])
   Exit: (16) isvar([v, c])
   Call: (16) isvalstrorundef(_G5786)
   Unify: (16) isvalstrorundef(_G5786)
   Call: (17) var(_G5786)
   Exit: (17) var(_G5786)
   Exit: (16) isvalstrorundef(_G5786)
   Call: (16) getvar([v, c], _G5787, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (16) getvar([v, c], _G5787, [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (17) lists:member([[v, c], _G5782], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, c], _G5782], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, c], ["a", "b"]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
^  Call: (17) not(["a", "b"]=empty)
^  Unify: (17) not(user: (["a", "b"]=empty))
^  Exit: (17) not(user: (["a", "b"]=empty))
   Exit: (16) getvar([v, c], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (15) getvalue([v, c], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, c], empty, ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) isval(["a", "b"])
   Unify: (15) isval(["a", "b"])
   Call: (16) number(["a", "b"])
   Fail: (16) number(["a", "b"])
   Fail: (15) isval(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) string(["a", "b"])
   Fail: (15) string(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
   Call: (15) atom(["a", "b"])
   Fail: (15) atom(["a", "b"])
   Redo: (14) expression(["a", "b"])
   Unify: (14) expression(["a", "b"])
^  Call: (15) not(atom(["a", "b"]))
^  Unify: (15) not(user:atom(["a", "b"]))
^  Exit: (15) not(user:atom(["a", "b"]))
   Call: (15) length(["a", "b"], _G5804)
   Unify: (15) length(["a", "b"], _G5804)
   Exit: (15) length(["a", "b"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["a", "b"])
   Unify: (15) expression2(["a", "b"])
   Call: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) expression3("a")
   Unify: (16) expression3("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) expression3("a")
   Call: (16) expression2(["b"])
   Unify: (16) expression2(["b"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["b"])
   Exit: (15) expression2(["a", "b"])
   Exit: (14) expression(["a", "b"])
   Call: (14) val1emptyorvalsequal(empty, ["a", "b"])
   Unify: (14) val1emptyorvalsequal(empty, ["a", "b"])
   Exit: (14) val1emptyorvalsequal(empty, ["a", "b"])
   Call: (14) putvalue([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5806)
   Unify: (14) putvalue([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5806)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5806)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["a", "b"])
   Unify: (15) isvalstrorundef(["a", "b"])
   Call: (16) var(["a", "b"])
   Fail: (16) var(["a", "b"])
   Redo: (15) isvalstrorundef(["a", "b"])
   Unify: (15) isvalstrorundef(["a", "b"])
^  Call: (16) not(var(["a", "b"]))
^  Unify: (16) not(user:var(["a", "b"]))
^  Exit: (16) not(user:var(["a", "b"]))
   Call: (16) isval(["a", "b"])
   Unify: (16) isval(["a", "b"])
   Call: (17) number(["a", "b"])
   Fail: (17) number(["a", "b"])
   Fail: (16) isval(["a", "b"])
   Redo: (15) isvalstrorundef(["a", "b"])
   Unify: (15) isvalstrorundef(["a", "b"])
^  Call: (16) not(var(["a", "b"]))
^  Unify: (16) not(user:var(["a", "b"]))
^  Exit: (16) not(user:var(["a", "b"]))
   Call: (16) expression(["a", "b"])
   Unify: (16) expression(["a", "b"])
   Call: (17) isval(["a", "b"])
   Unify: (17) isval(["a", "b"])
   Call: (18) number(["a", "b"])
   Fail: (18) number(["a", "b"])
   Fail: (17) isval(["a", "b"])
   Redo: (16) expression(["a", "b"])
   Unify: (16) expression(["a", "b"])
   Call: (17) string(["a", "b"])
   Fail: (17) string(["a", "b"])
   Redo: (16) expression(["a", "b"])
   Unify: (16) expression(["a", "b"])
   Call: (17) atom(["a", "b"])
   Fail: (17) atom(["a", "b"])
   Redo: (16) expression(["a", "b"])
   Unify: (16) expression(["a", "b"])
^  Call: (17) not(atom(["a", "b"]))
^  Unify: (17) not(user:atom(["a", "b"]))
^  Exit: (17) not(user:atom(["a", "b"]))
   Call: (17) length(["a", "b"], _G5814)
   Unify: (17) length(["a", "b"], _G5814)
   Exit: (17) length(["a", "b"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["a", "b"])
   Unify: (17) expression2(["a", "b"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2(["b"])
   Unify: (18) expression2(["b"])
   Call: (19) expression3("b")
   Unify: (19) expression3("b")
   Call: (20) isval("b")
   Unify: (20) isval("b")
   Call: (21) number("b")
   Fail: (21) number("b")
   Fail: (20) isval("b")
   Redo: (19) expression3("b")
   Unify: (19) expression3("b")
   Call: (20) string("b")
   Exit: (20) string("b")
   Exit: (19) expression3("b")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["b"])
   Exit: (17) expression2(["a", "b"])
   Exit: (16) expression(["a", "b"])
   Exit: (15) isvalstrorundef(["a", "b"])
   Call: (15) updatevar([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5816)
   Unify: (15) updatevar([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], _G5816)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[v, d], empty], _G5827)
   Unify: (16) lists:delete([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[v, d], empty], _G5827)
   Exit: (16) lists:delete([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[v, d], empty], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]])
   Call: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, d], ["a", "b"]]], _G5842)
   Unify: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, d], ["a", "b"]]], [[[v, c], ["a", "b"]]|_G5834])
   Exit: (16) lists:append([[[v, c], ["a", "b"]], [[v, b], ["b", "c"]]], [[[v, d], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Exit: (14) putvalue([v, d], ["a", "b"], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5852=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], _G5855, [], _G5857)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], empty]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [[[n, =], [[v, d], [v, c]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [], _G5855)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [], _G5855)
   Call: (12) [[[v, d], [v, d]]]=[[_G5848, _G5851]|_G5846]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5867)
   Unify: (13) length([v, d], _G5867)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [], _G5864)
   Call: (12) lists:member([[v, d], _G5857], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Unify: (12) lists:member([[v, d], _G5857], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Exit: (12) lists:member([[v, d], ["a", "b"]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]])
   Call: (12) lists:append([], [[[v, d], ["a", "b"]]], _G5878)
   Unify: (12) lists:append([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (12) lists:append([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Call: (12) updatevars([], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]], _G5879)
   Unify: (12) updatevars([], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (12) updatevars([], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["a", "b"]], [[v, b], ["b", "c"]], [[v, d], ["a", "b"]]], [], [[[v, d], ["a", "b"]]])
^  Call: (11) not([[[v, d], ["a", "b"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["a", "b"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["a", "b"]]]=[]))
   Call: (11) unique1([[[v, d], ["a", "b"]]], [], _G15)
   Unify: (11) unique1([[[v, d], ["a", "b"]]], [], _G15)
   Call: (12) lists:delete([], [[v, d], ["a", "b"]], _G5884)
   Unify: (12) lists:delete([], [[v, d], ["a", "b"]], [])
   Exit: (12) lists:delete([], [[v, d], ["a", "b"]], [])
   Call: (12) lists:append([], [[[v, d], ["a", "b"]]], _G5887)
   Unify: (12) lists:append([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (12) lists:append([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Call: (12) unique1([], [[[v, d], ["a", "b"]]], _G15)
   Unify: (12) unique1([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (12) unique1([], [[[v, d], ["a", "b"]]], [[[v, d], ["a", "b"]]])
   Exit: (11) unique1([[[v, d], ["a", "b"]]], [], [[[v, d], ["a", "b"]]])
   Call: (11) findresult3([["a", "b"], ["b", "c"], [v, d]], [[[v, d], ["a", "b"]]], [], _G5888)
   Unify: (11) findresult3([["a", "b"], ["b", "c"], [v, d]], [[[v, d], ["a", "b"]]], [], _G5888)
   Call: (12) [["a", "b"], ["b", "c"], [v, d]]=[_G5878|_G5879]
   Exit: (12) [["a", "b"], ["b", "c"], [v, d]]=[["a", "b"], ["b", "c"], [v, d]]
   Call: (12) expressionnotatom(["a", "b"])
   Unify: (12) expressionnotatom(["a", "b"])
   Call: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) var(["a", "b"])
   Fail: (14) var(["a", "b"])
   Redo: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) isval(["a", "b"])
   Unify: (14) isval(["a", "b"])
   Call: (15) number(["a", "b"])
   Fail: (15) number(["a", "b"])
   Fail: (14) isval(["a", "b"])
   Redo: (13) isvalstrempty(["a", "b"])
   Unify: (13) isvalstrempty(["a", "b"])
   Call: (14) string(["a", "b"])
   Fail: (14) string(["a", "b"])
   Fail: (13) isvalstrempty(["a", "b"])
   Redo: (12) expressionnotatom(["a", "b"])
   Unify: (12) expressionnotatom(["a", "b"])
^  Call: (13) not(atom(["a", "b"]))
^  Unify: (13) not(user:atom(["a", "b"]))
^  Exit: (13) not(user:atom(["a", "b"]))
   Call: (13) length(["a", "b"], _G5894)
   Unify: (13) length(["a", "b"], _G5894)
   Exit: (13) length(["a", "b"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["a", "b"])
   Unify: (13) expressionnotatom2(["a", "b"])
   Call: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) var("a")
   Fail: (15) var("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) isval("a")
   Unify: (15) isval("a")
   Call: (16) number("a")
   Fail: (16) number("a")
   Fail: (15) isval("a")
   Redo: (14) isvalstrempty("a")
   Unify: (14) isvalstrempty("a")
   Call: (15) string("a")
   Exit: (15) string("a")
   Exit: (14) isvalstrempty("a")
   Call: (14) expressionnotatom2(["b"])
   Unify: (14) expressionnotatom2(["b"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["b"])
   Exit: (13) expressionnotatom2(["a", "b"])
   Exit: (12) expressionnotatom(["a", "b"])
   Call: (12) lists:append([], [["a", "b"]], _G5898)
   Unify: (12) lists:append([], [["a", "b"]], [["a", "b"]])
   Exit: (12) lists:append([], [["a", "b"]], [["a", "b"]])
   Call: (12) findresult3([["b", "c"], [v, d]], [[[v, d], ["a", "b"]]], [["a", "b"]], _G5899)
   Unify: (12) findresult3([["b", "c"], [v, d]], [[[v, d], ["a", "b"]]], [["a", "b"]], _G5899)
   Call: (13) [["b", "c"], [v, d]]=[_G5889|_G5890]
   Exit: (13) [["b", "c"], [v, d]]=[["b", "c"], [v, d]]
   Call: (13) expressionnotatom(["b", "c"])
   Unify: (13) expressionnotatom(["b", "c"])
   Call: (14) isvalstrempty(["b", "c"])
   Unify: (14) isvalstrempty(["b", "c"])
   Call: (15) var(["b", "c"])
   Fail: (15) var(["b", "c"])
   Redo: (14) isvalstrempty(["b", "c"])
   Unify: (14) isvalstrempty(["b", "c"])
   Call: (15) isval(["b", "c"])
   Unify: (15) isval(["b", "c"])
   Call: (16) number(["b", "c"])
   Fail: (16) number(["b", "c"])
   Fail: (15) isval(["b", "c"])
   Redo: (14) isvalstrempty(["b", "c"])
   Unify: (14) isvalstrempty(["b", "c"])
   Call: (15) string(["b", "c"])
   Fail: (15) string(["b", "c"])
   Fail: (14) isvalstrempty(["b", "c"])
   Redo: (13) expressionnotatom(["b", "c"])
   Unify: (13) expressionnotatom(["b", "c"])
^  Call: (14) not(atom(["b", "c"]))
^  Unify: (14) not(user:atom(["b", "c"]))
^  Exit: (14) not(user:atom(["b", "c"]))
   Call: (14) length(["b", "c"], _G5905)
   Unify: (14) length(["b", "c"], _G5905)
   Exit: (14) length(["b", "c"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "c"])
   Unify: (14) expressionnotatom2(["b", "c"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["c"])
   Unify: (15) expressionnotatom2(["c"])
   Call: (16) isvalstrempty("c")
   Unify: (16) isvalstrempty("c")
   Call: (17) var("c")
   Fail: (17) var("c")
   Redo: (16) isvalstrempty("c")
   Unify: (16) isvalstrempty("c")
   Call: (17) isval("c")
   Unify: (17) isval("c")
   Call: (18) number("c")
   Fail: (18) number("c")
   Fail: (17) isval("c")
   Redo: (16) isvalstrempty("c")
   Unify: (16) isvalstrempty("c")
   Call: (17) string("c")
   Exit: (17) string("c")
   Exit: (16) isvalstrempty("c")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["c"])
   Exit: (14) expressionnotatom2(["b", "c"])
   Exit: (13) expressionnotatom(["b", "c"])
   Call: (13) lists:append([["a", "b"]], [["b", "c"]], _G5909)
   Unify: (13) lists:append([["a", "b"]], [["b", "c"]], [["a", "b"]|_G5901])
   Exit: (13) lists:append([["a", "b"]], [["b", "c"]], [["a", "b"], ["b", "c"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["b", "c"]], _G5913)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["b", "c"]], _G5913)
   Call: (14) [[v, d]]=[_G5903|_G5904]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5919)
   Unify: (15) length([v, d], _G5919)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["b", "c"]], _G5913)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["b", "c"]], _G5913)
   Call: (14) [[v, d]]=[_G5903|_G5904]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5909], [[[v, d], ["a", "b"]]])
   Unify: (14) lists:member([[v, d], _G5909], [[[v, d], ["a", "b"]]])
   Exit: (14) lists:member([[v, d], ["a", "b"]], [[[v, d], ["a", "b"]]])
   Call: (14) lists:append([["a", "b"], ["b", "c"]], [["a", "b"]], _G5924)
   Unify: (14) lists:append([["a", "b"], ["b", "c"]], [["a", "b"]], [["a", "b"]|_G5916])
   Exit: (14) lists:append([["a", "b"], ["b", "c"]], [["a", "b"]], [["a", "b"], ["b", "c"], ["a", "b"]])
   Call: (14) findresult3([], [[[v, d], ["a", "b"]]], [["a", "b"], ["b", "c"], ["a", "b"]], _G5931)
   Unify: (14) findresult3([], [[[v, d], ["a", "b"]]], [["a", "b"], ["b", "c"], ["a", "b"]], [["a", "b"], ["b", "c"], ["a", "b"]])
   Exit: (14) findresult3([], [[[v, d], ["a", "b"]]], [["a", "b"], ["b", "c"], ["a", "b"]], [["a", "b"], ["b", "c"], ["a", "b"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["a", "b"]]], [["a", "b"], ["b", "c"]], [["a", "b"], ["b", "c"], ["a", "b"]])
   Exit: (12) findresult3([["b", "c"], [v, d]], [[[v, d], ["a", "b"]]], [["a", "b"]], [["a", "b"], ["b", "c"], ["a", "b"]])
   Exit: (11) findresult3([["a", "b"], ["b", "c"], [v, d]], [[[v, d], ["a", "b"]]], [], [["a", "b"], ["b", "c"], ["a", "b"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "b"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "b"]]])
   Exit: (9) interpret1(off, [[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "b"]]])
   Exit: (8) interpret(off, [[n, f], [["a", "b"], ["b", "c"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["a", "b"]]])

   Call: (8) interpret(off, [[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (8) interpret(off, [[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], _G5554, "->", _G5563]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5554, [], _G5556)
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5551], "->", _G5560]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5551, [], _G5553)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5542|_G5543]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5545, _G5548, ":-", _G5557]
   Exit: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], _G5572)
   Unify: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5572, [], _G5574)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], _G5572)
   Unify: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]|_G5564])
   Exit: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (9) interpret1(off, [[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
^  Call: (10) retractall(debug(_G5566))
^  Exit: (10) retractall(debug(_G5566))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5570))
^  Exit: (10) retractall(cut(_G5570))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Unify: (10) member1([[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["b", "c"], ["b", "a"], [v, d]]]=[_G5574, _G5577]
   Exit: (11) [[n, f], [["b", "c"], ["b", "a"], [v, d]]]=[[n, f], [["b", "c"], ["b", "a"], [v, d]]]
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5586, ":-", _G5595]|_G5581]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["b", "c"], ["b", "a"], [v, d]], _G5606)
   Unify: (11) length([["b", "c"], ["b", "a"], [v, d]], _G5606)
   Exit: (11) length([["b", "c"], ["b", "a"], [v, d]], 3)
   Call: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Exit: (11) length([[v, c], [v, b], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) checkarguments([["b", "c"], ["b", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5608, [], _G5610)
   Unify: (11) checkarguments([["b", "c"], ["b", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5608, [], _G5610)
   Call: (12) [["b", "c"], ["b", "a"], [v, d]]=[_G5598|_G5599]
   Exit: (12) [["b", "c"], ["b", "a"], [v, d]]=[["b", "c"], ["b", "a"], [v, d]]
   Call: (12) expressionnotatom(["b", "c"])
   Unify: (12) expressionnotatom(["b", "c"])
   Call: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) var(["b", "c"])
   Fail: (14) var(["b", "c"])
   Redo: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) isval(["b", "c"])
   Unify: (14) isval(["b", "c"])
   Call: (15) number(["b", "c"])
   Fail: (15) number(["b", "c"])
   Fail: (14) isval(["b", "c"])
   Redo: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) string(["b", "c"])
   Fail: (14) string(["b", "c"])
   Fail: (13) isvalstrempty(["b", "c"])
   Redo: (12) expressionnotatom(["b", "c"])
   Unify: (12) expressionnotatom(["b", "c"])
^  Call: (13) not(atom(["b", "c"]))
^  Unify: (13) not(user:atom(["b", "c"]))
^  Exit: (13) not(user:atom(["b", "c"]))
   Call: (13) length(["b", "c"], _G5614)
   Unify: (13) length(["b", "c"], _G5614)
   Exit: (13) length(["b", "c"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["b", "c"])
   Unify: (13) expressionnotatom2(["b", "c"])
   Call: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) var("b")
   Fail: (15) var("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) isval("b")
   Unify: (15) isval("b")
   Call: (16) number("b")
   Fail: (16) number("b")
   Fail: (15) isval("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) string("b")
   Exit: (15) string("b")
   Exit: (14) isvalstrempty("b")
   Call: (14) expressionnotatom2(["c"])
   Unify: (14) expressionnotatom2(["c"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["c"])
   Exit: (13) expressionnotatom2(["b", "c"])
   Exit: (12) expressionnotatom(["b", "c"])
   Call: (12) [[v, c], [v, b], [v, d]]=[_G5606|_G5607]
   Exit: (12) [[v, c], [v, b], [v, d]]=[[v, c], [v, b], [v, d]]
^  Call: (12) not(var([v, c]))
^  Unify: (12) not(user:var([v, c]))
^  Exit: (12) not(user:var([v, c]))
   Call: (12) isvar([v, c])
   Unify: (12) isvar([v, c])
   Exit: (12) isvar([v, c])
   Call: (12) putvalue([v, c], ["b", "c"], [], _G5624)
   Unify: (12) putvalue([v, c], ["b", "c"], [], _G5624)
^  Call: (13) not(isvar([v, c]))
^  Unify: (13) not(user:isvar([v, c]))
   Call: (14) isvar([v, c])
   Unify: (14) isvar([v, c])
   Exit: (14) isvar([v, c])
^  Fail: (13) not(user:isvar([v, c]))
   Redo: (12) putvalue([v, c], ["b", "c"], [], _G5624)
   Call: (13) isvar([v, c])
   Unify: (13) isvar([v, c])
   Exit: (13) isvar([v, c])
   Call: (13) isvalstrorundef(["b", "c"])
   Unify: (13) isvalstrorundef(["b", "c"])
   Call: (14) var(["b", "c"])
   Fail: (14) var(["b", "c"])
   Redo: (13) isvalstrorundef(["b", "c"])
   Unify: (13) isvalstrorundef(["b", "c"])
^  Call: (14) not(var(["b", "c"]))
^  Unify: (14) not(user:var(["b", "c"]))
^  Exit: (14) not(user:var(["b", "c"]))
   Call: (14) isval(["b", "c"])
   Unify: (14) isval(["b", "c"])
   Call: (15) number(["b", "c"])
   Fail: (15) number(["b", "c"])
   Fail: (14) isval(["b", "c"])
   Redo: (13) isvalstrorundef(["b", "c"])
   Unify: (13) isvalstrorundef(["b", "c"])
^  Call: (14) not(var(["b", "c"]))
^  Unify: (14) not(user:var(["b", "c"]))
^  Exit: (14) not(user:var(["b", "c"]))
   Call: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) isval(["b", "c"])
   Unify: (15) isval(["b", "c"])
   Call: (16) number(["b", "c"])
   Fail: (16) number(["b", "c"])
   Fail: (15) isval(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) string(["b", "c"])
   Fail: (15) string(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) atom(["b", "c"])
   Fail: (15) atom(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
^  Call: (15) not(atom(["b", "c"]))
^  Unify: (15) not(user:atom(["b", "c"]))
^  Exit: (15) not(user:atom(["b", "c"]))
   Call: (15) length(["b", "c"], _G5632)
   Unify: (15) length(["b", "c"], _G5632)
   Exit: (15) length(["b", "c"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "c"])
   Unify: (15) expression2(["b", "c"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["c"])
   Unify: (16) expression2(["c"])
   Call: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) isval("c")
   Unify: (18) isval("c")
   Call: (19) number("c")
   Fail: (19) number("c")
   Fail: (18) isval("c")
   Redo: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) string("c")
   Exit: (18) string("c")
   Exit: (17) expression3("c")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["c"])
   Exit: (15) expression2(["b", "c"])
   Exit: (14) expression(["b", "c"])
   Exit: (13) isvalstrorundef(["b", "c"])
   Call: (13) updatevar([v, c], ["b", "c"], [], _G5634)
   Unify: (13) updatevar([v, c], ["b", "c"], [], _G5634)
   Call: (14) lists:member([[v, c], empty], [])
   Fail: (14) lists:member([[v, c], empty], [])
   Redo: (13) updatevar([v, c], ["b", "c"], [], _G5634)
^  Call: (14) not(member([[v, c], _G5630], []))
^  Unify: (14) not(user:member([[v, c], _G5630], []))
^  Exit: (14) not(user:member([[v, c], _G5630], []))
   Call: (14) _G5630=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, c], ["b", "c"]]], _G5654)
   Unify: (14) lists:append([], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]]])
   Exit: (14) lists:append([], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, c], ["b", "c"], [], [[[v, c], ["b", "c"]]])
   Exit: (12) putvalue([v, c], ["b", "c"], [], [[[v, c], ["b", "c"]]])
   Call: (12) checkarguments([["b", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "c"]]], _G5655, [], _G5657)
   Unify: (12) checkarguments([["b", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "c"]]], _G5655, [], _G5657)
   Call: (13) [["b", "a"], [v, d]]=[_G5645|_G5646]
   Exit: (13) [["b", "a"], [v, d]]=[["b", "a"], [v, d]]
   Call: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
   Call: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Fail: (14) isvalstrempty(["b", "a"])
   Redo: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
^  Call: (14) not(atom(["b", "a"]))
^  Unify: (14) not(user:atom(["b", "a"]))
^  Exit: (14) not(user:atom(["b", "a"]))
   Call: (14) length(["b", "a"], _G5661)
   Unify: (14) length(["b", "a"], _G5661)
   Exit: (14) length(["b", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "a"])
   Unify: (14) expressionnotatom2(["b", "a"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["b", "a"])
   Exit: (13) expressionnotatom(["b", "a"])
   Call: (13) [[v, b], [v, d]]=[_G5653|_G5654]
   Exit: (13) [[v, b], [v, d]]=[[v, b], [v, d]]
^  Call: (13) not(var([v, b]))
^  Unify: (13) not(user:var([v, b]))
^  Exit: (13) not(user:var([v, b]))
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) putvalue([v, b], ["b", "a"], [[[v, c], ["b", "c"]]], _G5671)
   Unify: (13) putvalue([v, b], ["b", "a"], [[[v, c], ["b", "c"]]], _G5671)
^  Call: (14) not(isvar([v, b]))
^  Unify: (14) not(user:isvar([v, b]))
   Call: (15) isvar([v, b])
   Unify: (15) isvar([v, b])
   Exit: (15) isvar([v, b])
^  Fail: (14) not(user:isvar([v, b]))
   Redo: (13) putvalue([v, b], ["b", "a"], [[[v, c], ["b", "c"]]], _G5671)
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
   Call: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
^  Call: (15) not(var(["b", "a"]))
^  Unify: (15) not(user:var(["b", "a"]))
^  Exit: (15) not(user:var(["b", "a"]))
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrorundef(["b", "a"])
   Unify: (14) isvalstrorundef(["b", "a"])
^  Call: (15) not(var(["b", "a"]))
^  Unify: (15) not(user:var(["b", "a"]))
^  Exit: (15) not(user:var(["b", "a"]))
   Call: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) isval(["b", "a"])
   Unify: (16) isval(["b", "a"])
   Call: (17) number(["b", "a"])
   Fail: (17) number(["b", "a"])
   Fail: (16) isval(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) string(["b", "a"])
   Fail: (16) string(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
   Call: (16) atom(["b", "a"])
   Fail: (16) atom(["b", "a"])
   Redo: (15) expression(["b", "a"])
   Unify: (15) expression(["b", "a"])
^  Call: (16) not(atom(["b", "a"]))
^  Unify: (16) not(user:atom(["b", "a"]))
^  Exit: (16) not(user:atom(["b", "a"]))
   Call: (16) length(["b", "a"], _G5679)
   Unify: (16) length(["b", "a"], _G5679)
   Exit: (16) length(["b", "a"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["b", "a"])
   Unify: (16) expression2(["b", "a"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2(["a"])
   Unify: (17) expression2(["a"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["a"])
   Exit: (16) expression2(["b", "a"])
   Exit: (15) expression(["b", "a"])
   Exit: (14) isvalstrorundef(["b", "a"])
   Call: (14) updatevar([v, b], ["b", "a"], [[[v, c], ["b", "c"]]], _G5681)
   Unify: (14) updatevar([v, b], ["b", "a"], [[[v, c], ["b", "c"]]], _G5681)
   Call: (15) lists:member([[v, b], empty], [[[v, c], ["b", "c"]]])
   Unify: (15) lists:member([[v, b], empty], [[[v, c], ["b", "c"]]])
   Fail: (15) lists:member([[v, b], empty], [[[v, c], ["b", "c"]]])
   Redo: (14) updatevar([v, b], ["b", "a"], [[[v, c], ["b", "c"]]], _G5681)
^  Call: (15) not(member([[v, b], _G5677], [[[v, c], ["b", "c"]]]))
^  Unify: (15) not(user:member([[v, b], _G5677], [[[v, c], ["b", "c"]]]))
^  Exit: (15) not(user:member([[v, b], _G5677], [[[v, c], ["b", "c"]]]))
   Call: (15) _G5677=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, c], ["b", "c"]]], [[[v, b], ["b", "a"]]], _G5701)
   Unify: (15) lists:append([[[v, c], ["b", "c"]]], [[[v, b], ["b", "a"]]], [[[v, c], ["b", "c"]]|_G5693])
   Exit: (15) lists:append([[[v, c], ["b", "c"]]], [[[v, b], ["b", "a"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, b], ["b", "a"], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Exit: (13) putvalue([v, b], ["b", "a"], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5711)
   Unify: (15) length([v, d], _G5711)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5719)
   Unify: (15) length([v, d], _G5719)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5705, [], _G5707)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5705, [], _G5707)
   Call: (14) [[v, d]]=[_G5695|_G5696]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5703|_G5704]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Unify: (14) getvalue([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5718)
   Unify: (15) isvalstrorundef(_G5718)
   Call: (16) var(_G5718)
   Exit: (16) var(_G5718)
   Exit: (15) isvalstrorundef(_G5718)
   Call: (15) getvar([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Unify: (15) getvar([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Call: (16) lists:member([[v, d], _G5714], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Unify: (16) lists:member([[v, d], _G5714], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Fail: (16) lists:member([[v, d], _G5714], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Redo: (15) getvar([v, d], _G5719, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Unify: (15) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
^  Call: (16) not(member([[v, d], _G5717], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5717], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5717], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5733)
   Unify: (14) putvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5733)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5733)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5738)
   Unify: (15) updatevar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5738)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], _G5738)
^  Call: (16) not(member([[v, d], _G5734], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5734], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5734], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]]))
   Call: (16) _G5734=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, d], empty]], _G5758)
   Unify: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, d], empty]], [[[v, c], ["b", "c"]]|_G5750])
   Exit: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5773)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[v, d], [v, d]]], _G5776)
   Unify: (14) checkarguments([], [], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["b", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["b", "c"], ["b", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G14)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5781]]|_G5773]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5781]]|_G5773]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[_G5775], or, [_G5784]]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[_G5775], or, [_G5784]]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5772|_G5773]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5782, [[n, =], [[v, d], [v, c]]], _G5784)
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5773]]|_G5765]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5773]]|_G5765]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5767], or, [_G5776]]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5767], or, [_G5776]]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5774, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5764|_G5765]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5783, _G5784, _G5785)
   Unify: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5783, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5783)
   Unify: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5783)
   Call: (14) getvalues([v, d], [v, c], _G5781, _G5782, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, c], _G5781, _G5782, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5779)
   Unify: (16) isvalstrorundef(_G5779)
   Call: (17) var(_G5779)
   Exit: (17) var(_G5779)
   Exit: (16) isvalstrorundef(_G5779)
   Call: (16) getvar([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5775], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5775], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5780, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5778], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5778], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5778], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, c]))
^  Unify: (16) not(user:isvar([v, c]))
   Call: (17) isvar([v, c])
   Unify: (17) isvar([v, c])
   Exit: (17) isvar([v, c])
^  Fail: (16) not(user:isvar([v, c]))
   Redo: (15) getvalue([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, c])
   Unify: (16) isvar([v, c])
   Exit: (16) isvar([v, c])
   Call: (16) isvalstrorundef(_G5785)
   Unify: (16) isvalstrorundef(_G5785)
   Call: (17) var(_G5785)
   Exit: (17) var(_G5785)
   Exit: (16) isvalstrorundef(_G5785)
   Call: (16) getvar([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, c], _G5786, [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, c], _G5781], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, c], _G5781], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, c], ["b", "c"]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
^  Call: (17) not(["b", "c"]=empty)
^  Unify: (17) not(user: (["b", "c"]=empty))
^  Exit: (17) not(user: (["b", "c"]=empty))
   Exit: (16) getvar([v, c], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, c], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, c], empty, ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) isval(["b", "c"])
   Unify: (15) isval(["b", "c"])
   Call: (16) number(["b", "c"])
   Fail: (16) number(["b", "c"])
   Fail: (15) isval(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) string(["b", "c"])
   Fail: (15) string(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
   Call: (15) atom(["b", "c"])
   Fail: (15) atom(["b", "c"])
   Redo: (14) expression(["b", "c"])
   Unify: (14) expression(["b", "c"])
^  Call: (15) not(atom(["b", "c"]))
^  Unify: (15) not(user:atom(["b", "c"]))
^  Exit: (15) not(user:atom(["b", "c"]))
   Call: (15) length(["b", "c"], _G5803)
   Unify: (15) length(["b", "c"], _G5803)
   Exit: (15) length(["b", "c"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "c"])
   Unify: (15) expression2(["b", "c"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["c"])
   Unify: (16) expression2(["c"])
   Call: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) isval("c")
   Unify: (18) isval("c")
   Call: (19) number("c")
   Fail: (19) number("c")
   Fail: (18) isval("c")
   Redo: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) string("c")
   Exit: (18) string("c")
   Exit: (17) expression3("c")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["c"])
   Exit: (15) expression2(["b", "c"])
   Exit: (14) expression(["b", "c"])
   Call: (14) val1emptyorvalsequal(empty, ["b", "c"])
   Unify: (14) val1emptyorvalsequal(empty, ["b", "c"])
   Exit: (14) val1emptyorvalsequal(empty, ["b", "c"])
   Call: (14) putvalue([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5805)
   Unify: (14) putvalue([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5805)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5805)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["b", "c"])
   Unify: (15) isvalstrorundef(["b", "c"])
   Call: (16) var(["b", "c"])
   Fail: (16) var(["b", "c"])
   Redo: (15) isvalstrorundef(["b", "c"])
   Unify: (15) isvalstrorundef(["b", "c"])
^  Call: (16) not(var(["b", "c"]))
^  Unify: (16) not(user:var(["b", "c"]))
^  Exit: (16) not(user:var(["b", "c"]))
   Call: (16) isval(["b", "c"])
   Unify: (16) isval(["b", "c"])
   Call: (17) number(["b", "c"])
   Fail: (17) number(["b", "c"])
   Fail: (16) isval(["b", "c"])
   Redo: (15) isvalstrorundef(["b", "c"])
   Unify: (15) isvalstrorundef(["b", "c"])
^  Call: (16) not(var(["b", "c"]))
^  Unify: (16) not(user:var(["b", "c"]))
^  Exit: (16) not(user:var(["b", "c"]))
   Call: (16) expression(["b", "c"])
   Unify: (16) expression(["b", "c"])
   Call: (17) isval(["b", "c"])
   Unify: (17) isval(["b", "c"])
   Call: (18) number(["b", "c"])
   Fail: (18) number(["b", "c"])
   Fail: (17) isval(["b", "c"])
   Redo: (16) expression(["b", "c"])
   Unify: (16) expression(["b", "c"])
   Call: (17) string(["b", "c"])
   Fail: (17) string(["b", "c"])
   Redo: (16) expression(["b", "c"])
   Unify: (16) expression(["b", "c"])
   Call: (17) atom(["b", "c"])
   Fail: (17) atom(["b", "c"])
   Redo: (16) expression(["b", "c"])
   Unify: (16) expression(["b", "c"])
^  Call: (17) not(atom(["b", "c"]))
^  Unify: (17) not(user:atom(["b", "c"]))
^  Exit: (17) not(user:atom(["b", "c"]))
   Call: (17) length(["b", "c"], _G5813)
   Unify: (17) length(["b", "c"], _G5813)
   Exit: (17) length(["b", "c"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["b", "c"])
   Unify: (17) expression2(["b", "c"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2(["c"])
   Unify: (18) expression2(["c"])
   Call: (19) expression3("c")
   Unify: (19) expression3("c")
   Call: (20) isval("c")
   Unify: (20) isval("c")
   Call: (21) number("c")
   Fail: (21) number("c")
   Fail: (20) isval("c")
   Redo: (19) expression3("c")
   Unify: (19) expression3("c")
   Call: (20) string("c")
   Exit: (20) string("c")
   Exit: (19) expression3("c")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["c"])
   Exit: (17) expression2(["b", "c"])
   Exit: (16) expression(["b", "c"])
   Exit: (15) isvalstrorundef(["b", "c"])
   Call: (15) updatevar([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5815)
   Unify: (15) updatevar([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], _G5815)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Unify: (16) lists:delete([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[v, d], empty], _G5826)
   Exit: (16) lists:delete([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[v, d], empty], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]])
   Call: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, d], ["b", "c"]]], _G5841)
   Unify: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, d], ["b", "c"]]], [[[v, c], ["b", "c"]]|_G5833])
   Exit: (16) lists:append([[[v, c], ["b", "c"]], [[v, b], ["b", "a"]]], [[[v, d], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Exit: (14) putvalue([v, d], ["b", "c"], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5851=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], _G5854, [], _G5856)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], empty]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [[[n, =], [[v, d], [v, c]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [], _G5854)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [], _G5854)
   Call: (12) [[[v, d], [v, d]]]=[[_G5847, _G5850]|_G5845]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5866)
   Unify: (13) length([v, d], _G5866)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [], _G5863)
   Call: (12) lists:member([[v, d], _G5856], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Unify: (12) lists:member([[v, d], _G5856], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Exit: (12) lists:member([[v, d], ["b", "c"]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]])
   Call: (12) lists:append([], [[[v, d], ["b", "c"]]], _G5877)
   Unify: (12) lists:append([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Call: (12) updatevars([], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]], _G5878)
   Unify: (12) updatevars([], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (12) updatevars([], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "c"]], [[v, b], ["b", "a"]], [[v, d], ["b", "c"]]], [], [[[v, d], ["b", "c"]]])
^  Call: (11) not([[[v, d], ["b", "c"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["b", "c"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["b", "c"]]]=[]))
   Call: (11) unique1([[[v, d], ["b", "c"]]], [], _G14)
   Unify: (11) unique1([[[v, d], ["b", "c"]]], [], _G14)
   Call: (12) lists:delete([], [[v, d], ["b", "c"]], _G5883)
   Unify: (12) lists:delete([], [[v, d], ["b", "c"]], [])
   Exit: (12) lists:delete([], [[v, d], ["b", "c"]], [])
   Call: (12) lists:append([], [[[v, d], ["b", "c"]]], _G5886)
   Unify: (12) lists:append([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Call: (12) unique1([], [[[v, d], ["b", "c"]]], _G14)
   Unify: (12) unique1([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (12) unique1([], [[[v, d], ["b", "c"]]], [[[v, d], ["b", "c"]]])
   Exit: (11) unique1([[[v, d], ["b", "c"]]], [], [[[v, d], ["b", "c"]]])
   Call: (11) findresult3([["b", "c"], ["b", "a"], [v, d]], [[[v, d], ["b", "c"]]], [], _G5887)
   Unify: (11) findresult3([["b", "c"], ["b", "a"], [v, d]], [[[v, d], ["b", "c"]]], [], _G5887)
   Call: (12) [["b", "c"], ["b", "a"], [v, d]]=[_G5877|_G5878]
   Exit: (12) [["b", "c"], ["b", "a"], [v, d]]=[["b", "c"], ["b", "a"], [v, d]]
   Call: (12) expressionnotatom(["b", "c"])
   Unify: (12) expressionnotatom(["b", "c"])
   Call: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) var(["b", "c"])
   Fail: (14) var(["b", "c"])
   Redo: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) isval(["b", "c"])
   Unify: (14) isval(["b", "c"])
   Call: (15) number(["b", "c"])
   Fail: (15) number(["b", "c"])
   Fail: (14) isval(["b", "c"])
   Redo: (13) isvalstrempty(["b", "c"])
   Unify: (13) isvalstrempty(["b", "c"])
   Call: (14) string(["b", "c"])
   Fail: (14) string(["b", "c"])
   Fail: (13) isvalstrempty(["b", "c"])
   Redo: (12) expressionnotatom(["b", "c"])
   Unify: (12) expressionnotatom(["b", "c"])
^  Call: (13) not(atom(["b", "c"]))
^  Unify: (13) not(user:atom(["b", "c"]))
^  Exit: (13) not(user:atom(["b", "c"]))
   Call: (13) length(["b", "c"], _G5893)
   Unify: (13) length(["b", "c"], _G5893)
   Exit: (13) length(["b", "c"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["b", "c"])
   Unify: (13) expressionnotatom2(["b", "c"])
   Call: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) var("b")
   Fail: (15) var("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) isval("b")
   Unify: (15) isval("b")
   Call: (16) number("b")
   Fail: (16) number("b")
   Fail: (15) isval("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) string("b")
   Exit: (15) string("b")
   Exit: (14) isvalstrempty("b")
   Call: (14) expressionnotatom2(["c"])
   Unify: (14) expressionnotatom2(["c"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["c"])
   Exit: (13) expressionnotatom2(["b", "c"])
   Exit: (12) expressionnotatom(["b", "c"])
   Call: (12) lists:append([], [["b", "c"]], _G5897)
   Unify: (12) lists:append([], [["b", "c"]], [["b", "c"]])
   Exit: (12) lists:append([], [["b", "c"]], [["b", "c"]])
   Call: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "c"]]], [["b", "c"]], _G5898)
   Unify: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "c"]]], [["b", "c"]], _G5898)
   Call: (13) [["b", "a"], [v, d]]=[_G5888|_G5889]
   Exit: (13) [["b", "a"], [v, d]]=[["b", "a"], [v, d]]
   Call: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
   Call: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) var(["b", "a"])
   Fail: (15) var(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) isvalstrempty(["b", "a"])
   Unify: (14) isvalstrempty(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Fail: (14) isvalstrempty(["b", "a"])
   Redo: (13) expressionnotatom(["b", "a"])
   Unify: (13) expressionnotatom(["b", "a"])
^  Call: (14) not(atom(["b", "a"]))
^  Unify: (14) not(user:atom(["b", "a"]))
^  Exit: (14) not(user:atom(["b", "a"]))
   Call: (14) length(["b", "a"], _G5904)
   Unify: (14) length(["b", "a"], _G5904)
   Exit: (14) length(["b", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["b", "a"])
   Unify: (14) expressionnotatom2(["b", "a"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["b", "a"])
   Exit: (13) expressionnotatom(["b", "a"])
   Call: (13) lists:append([["b", "c"]], [["b", "a"]], _G5908)
   Unify: (13) lists:append([["b", "c"]], [["b", "a"]], [["b", "c"]|_G5900])
   Exit: (13) lists:append([["b", "c"]], [["b", "a"]], [["b", "c"], ["b", "a"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["b", "a"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["b", "a"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5918)
   Unify: (15) length([v, d], _G5918)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["b", "a"]], _G5912)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["b", "a"]], _G5912)
   Call: (14) [[v, d]]=[_G5902|_G5903]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5908], [[[v, d], ["b", "c"]]])
   Unify: (14) lists:member([[v, d], _G5908], [[[v, d], ["b", "c"]]])
   Exit: (14) lists:member([[v, d], ["b", "c"]], [[[v, d], ["b", "c"]]])
   Call: (14) lists:append([["b", "c"], ["b", "a"]], [["b", "c"]], _G5923)
   Unify: (14) lists:append([["b", "c"], ["b", "a"]], [["b", "c"]], [["b", "c"]|_G5915])
   Exit: (14) lists:append([["b", "c"], ["b", "a"]], [["b", "c"]], [["b", "c"], ["b", "a"], ["b", "c"]])
   Call: (14) findresult3([], [[[v, d], ["b", "c"]]], [["b", "c"], ["b", "a"], ["b", "c"]], _G5930)
   Unify: (14) findresult3([], [[[v, d], ["b", "c"]]], [["b", "c"], ["b", "a"], ["b", "c"]], [["b", "c"], ["b", "a"], ["b", "c"]])
   Exit: (14) findresult3([], [[[v, d], ["b", "c"]]], [["b", "c"], ["b", "a"], ["b", "c"]], [["b", "c"], ["b", "a"], ["b", "c"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["b", "c"]]], [["b", "c"], ["b", "a"]], [["b", "c"], ["b", "a"], ["b", "c"]])
   Exit: (12) findresult3([["b", "a"], [v, d]], [[[v, d], ["b", "c"]]], [["b", "c"]], [["b", "c"], ["b", "a"], ["b", "c"]])
   Exit: (11) findresult3([["b", "c"], ["b", "a"], [v, d]], [[[v, d], ["b", "c"]]], [], [["b", "c"], ["b", "a"], ["b", "c"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "c"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "c"]]])
   Exit: (9) interpret1(off, [[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "c"]]])
   Exit: (8) interpret(off, [[n, f], [["b", "c"], ["b", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "c"]]])

   Call: (8) interpret(off, [[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (8) interpret(off, [[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5543|_G5544]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], _G5555, "->", _G5564]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], _G5555, "->", _G5564]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555, [], _G5557)
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], "->", _G5561]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5552], "->", _G5561]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5552, [], _G5554)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5543|_G5544]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5546, _G5549, ":-", _G5558]
   Exit: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], _G5573)
   Unify: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5573, [], _G5575)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], _G5573)
   Unify: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]|_G5565])
   Exit: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (9) interpret1(off, [[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
^  Call: (10) retractall(debug(_G5567))
^  Exit: (10) retractall(debug(_G5567))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5571))
^  Exit: (10) retractall(cut(_G5571))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Unify: (10) member1([[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["c", "b"], ["c", "a"], [v, d]]]=[_G5575, _G5578]
   Exit: (11) [[n, f], [["c", "b"], ["c", "a"], [v, d]]]=[[n, f], [["c", "b"], ["c", "a"], [v, d]]]
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5587, ":-", _G5596]|_G5582]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["c", "b"], ["c", "a"], [v, d]], _G5607)
   Unify: (11) length([["c", "b"], ["c", "a"], [v, d]], _G5607)
   Exit: (11) length([["c", "b"], ["c", "a"], [v, d]], 3)
   Call: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Exit: (11) length([[v, c], [v, b], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) checkarguments([["c", "b"], ["c", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5609, [], _G5611)
   Unify: (11) checkarguments([["c", "b"], ["c", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5609, [], _G5611)
   Call: (12) [["c", "b"], ["c", "a"], [v, d]]=[_G5599|_G5600]
   Exit: (12) [["c", "b"], ["c", "a"], [v, d]]=[["c", "b"], ["c", "a"], [v, d]]
   Call: (12) expressionnotatom(["c", "b"])
   Unify: (12) expressionnotatom(["c", "b"])
   Call: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) var(["c", "b"])
   Fail: (14) var(["c", "b"])
   Redo: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) isval(["c", "b"])
   Unify: (14) isval(["c", "b"])
   Call: (15) number(["c", "b"])
   Fail: (15) number(["c", "b"])
   Fail: (14) isval(["c", "b"])
   Redo: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) string(["c", "b"])
   Fail: (14) string(["c", "b"])
   Fail: (13) isvalstrempty(["c", "b"])
   Redo: (12) expressionnotatom(["c", "b"])
   Unify: (12) expressionnotatom(["c", "b"])
^  Call: (13) not(atom(["c", "b"]))
^  Unify: (13) not(user:atom(["c", "b"]))
^  Exit: (13) not(user:atom(["c", "b"]))
   Call: (13) length(["c", "b"], _G5615)
   Unify: (13) length(["c", "b"], _G5615)
   Exit: (13) length(["c", "b"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["c", "b"])
   Unify: (13) expressionnotatom2(["c", "b"])
   Call: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) var("c")
   Fail: (15) var("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) isval("c")
   Unify: (15) isval("c")
   Call: (16) number("c")
   Fail: (16) number("c")
   Fail: (15) isval("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) string("c")
   Exit: (15) string("c")
   Exit: (14) isvalstrempty("c")
   Call: (14) expressionnotatom2(["b"])
   Unify: (14) expressionnotatom2(["b"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["b"])
   Exit: (13) expressionnotatom2(["c", "b"])
   Exit: (12) expressionnotatom(["c", "b"])
   Call: (12) [[v, c], [v, b], [v, d]]=[_G5607|_G5608]
   Exit: (12) [[v, c], [v, b], [v, d]]=[[v, c], [v, b], [v, d]]
^  Call: (12) not(var([v, c]))
^  Unify: (12) not(user:var([v, c]))
^  Exit: (12) not(user:var([v, c]))
   Call: (12) isvar([v, c])
   Unify: (12) isvar([v, c])
   Exit: (12) isvar([v, c])
   Call: (12) putvalue([v, c], ["c", "b"], [], _G5625)
   Unify: (12) putvalue([v, c], ["c", "b"], [], _G5625)
^  Call: (13) not(isvar([v, c]))
^  Unify: (13) not(user:isvar([v, c]))
   Call: (14) isvar([v, c])
   Unify: (14) isvar([v, c])
   Exit: (14) isvar([v, c])
^  Fail: (13) not(user:isvar([v, c]))
   Redo: (12) putvalue([v, c], ["c", "b"], [], _G5625)
   Call: (13) isvar([v, c])
   Unify: (13) isvar([v, c])
   Exit: (13) isvar([v, c])
   Call: (13) isvalstrorundef(["c", "b"])
   Unify: (13) isvalstrorundef(["c", "b"])
   Call: (14) var(["c", "b"])
   Fail: (14) var(["c", "b"])
   Redo: (13) isvalstrorundef(["c", "b"])
   Unify: (13) isvalstrorundef(["c", "b"])
^  Call: (14) not(var(["c", "b"]))
^  Unify: (14) not(user:var(["c", "b"]))
^  Exit: (14) not(user:var(["c", "b"]))
   Call: (14) isval(["c", "b"])
   Unify: (14) isval(["c", "b"])
   Call: (15) number(["c", "b"])
   Fail: (15) number(["c", "b"])
   Fail: (14) isval(["c", "b"])
   Redo: (13) isvalstrorundef(["c", "b"])
   Unify: (13) isvalstrorundef(["c", "b"])
^  Call: (14) not(var(["c", "b"]))
^  Unify: (14) not(user:var(["c", "b"]))
^  Exit: (14) not(user:var(["c", "b"]))
   Call: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) isval(["c", "b"])
   Unify: (15) isval(["c", "b"])
   Call: (16) number(["c", "b"])
   Fail: (16) number(["c", "b"])
   Fail: (15) isval(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) string(["c", "b"])
   Fail: (15) string(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) atom(["c", "b"])
   Fail: (15) atom(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
^  Call: (15) not(atom(["c", "b"]))
^  Unify: (15) not(user:atom(["c", "b"]))
^  Exit: (15) not(user:atom(["c", "b"]))
   Call: (15) length(["c", "b"], _G5633)
   Unify: (15) length(["c", "b"], _G5633)
   Exit: (15) length(["c", "b"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["c", "b"])
   Unify: (15) expression2(["c", "b"])
   Call: (16) expression3("c")
   Unify: (16) expression3("c")
   Call: (17) isval("c")
   Unify: (17) isval("c")
   Call: (18) number("c")
   Fail: (18) number("c")
   Fail: (17) isval("c")
   Redo: (16) expression3("c")
   Unify: (16) expression3("c")
   Call: (17) string("c")
   Exit: (17) string("c")
   Exit: (16) expression3("c")
   Call: (16) expression2(["b"])
   Unify: (16) expression2(["b"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["b"])
   Exit: (15) expression2(["c", "b"])
   Exit: (14) expression(["c", "b"])
   Exit: (13) isvalstrorundef(["c", "b"])
   Call: (13) updatevar([v, c], ["c", "b"], [], _G5635)
   Unify: (13) updatevar([v, c], ["c", "b"], [], _G5635)
   Call: (14) lists:member([[v, c], empty], [])
   Fail: (14) lists:member([[v, c], empty], [])
   Redo: (13) updatevar([v, c], ["c", "b"], [], _G5635)
^  Call: (14) not(member([[v, c], _G5631], []))
^  Unify: (14) not(user:member([[v, c], _G5631], []))
^  Exit: (14) not(user:member([[v, c], _G5631], []))
   Call: (14) _G5631=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, c], ["c", "b"]]], _G5655)
   Unify: (14) lists:append([], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]]])
   Exit: (14) lists:append([], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, c], ["c", "b"], [], [[[v, c], ["c", "b"]]])
   Exit: (12) putvalue([v, c], ["c", "b"], [], [[[v, c], ["c", "b"]]])
   Call: (12) checkarguments([["c", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["c", "b"]]], _G5656, [], _G5658)
   Unify: (12) checkarguments([["c", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["c", "b"]]], _G5656, [], _G5658)
   Call: (13) [["c", "a"], [v, d]]=[_G5646|_G5647]
   Exit: (13) [["c", "a"], [v, d]]=[["c", "a"], [v, d]]
   Call: (13) expressionnotatom(["c", "a"])
   Unify: (13) expressionnotatom(["c", "a"])
   Call: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) var(["c", "a"])
   Fail: (15) var(["c", "a"])
   Redo: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) isval(["c", "a"])
   Unify: (15) isval(["c", "a"])
   Call: (16) number(["c", "a"])
   Fail: (16) number(["c", "a"])
   Fail: (15) isval(["c", "a"])
   Redo: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) string(["c", "a"])
   Fail: (15) string(["c", "a"])
   Fail: (14) isvalstrempty(["c", "a"])
   Redo: (13) expressionnotatom(["c", "a"])
   Unify: (13) expressionnotatom(["c", "a"])
^  Call: (14) not(atom(["c", "a"]))
^  Unify: (14) not(user:atom(["c", "a"]))
^  Exit: (14) not(user:atom(["c", "a"]))
   Call: (14) length(["c", "a"], _G5662)
   Unify: (14) length(["c", "a"], _G5662)
   Exit: (14) length(["c", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["c", "a"])
   Unify: (14) expressionnotatom2(["c", "a"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["c", "a"])
   Exit: (13) expressionnotatom(["c", "a"])
   Call: (13) [[v, b], [v, d]]=[_G5654|_G5655]
   Exit: (13) [[v, b], [v, d]]=[[v, b], [v, d]]
^  Call: (13) not(var([v, b]))
^  Unify: (13) not(user:var([v, b]))
^  Exit: (13) not(user:var([v, b]))
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) putvalue([v, b], ["c", "a"], [[[v, c], ["c", "b"]]], _G5672)
   Unify: (13) putvalue([v, b], ["c", "a"], [[[v, c], ["c", "b"]]], _G5672)
^  Call: (14) not(isvar([v, b]))
^  Unify: (14) not(user:isvar([v, b]))
   Call: (15) isvar([v, b])
   Unify: (15) isvar([v, b])
   Exit: (15) isvar([v, b])
^  Fail: (14) not(user:isvar([v, b]))
   Redo: (13) putvalue([v, b], ["c", "a"], [[[v, c], ["c", "b"]]], _G5672)
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
   Call: (14) isvalstrorundef(["c", "a"])
   Unify: (14) isvalstrorundef(["c", "a"])
   Call: (15) var(["c", "a"])
   Fail: (15) var(["c", "a"])
   Redo: (14) isvalstrorundef(["c", "a"])
   Unify: (14) isvalstrorundef(["c", "a"])
^  Call: (15) not(var(["c", "a"]))
^  Unify: (15) not(user:var(["c", "a"]))
^  Exit: (15) not(user:var(["c", "a"]))
   Call: (15) isval(["c", "a"])
   Unify: (15) isval(["c", "a"])
   Call: (16) number(["c", "a"])
   Fail: (16) number(["c", "a"])
   Fail: (15) isval(["c", "a"])
   Redo: (14) isvalstrorundef(["c", "a"])
   Unify: (14) isvalstrorundef(["c", "a"])
^  Call: (15) not(var(["c", "a"]))
^  Unify: (15) not(user:var(["c", "a"]))
^  Exit: (15) not(user:var(["c", "a"]))
   Call: (15) expression(["c", "a"])
   Unify: (15) expression(["c", "a"])
   Call: (16) isval(["c", "a"])
   Unify: (16) isval(["c", "a"])
   Call: (17) number(["c", "a"])
   Fail: (17) number(["c", "a"])
   Fail: (16) isval(["c", "a"])
   Redo: (15) expression(["c", "a"])
   Unify: (15) expression(["c", "a"])
   Call: (16) string(["c", "a"])
   Fail: (16) string(["c", "a"])
   Redo: (15) expression(["c", "a"])
   Unify: (15) expression(["c", "a"])
   Call: (16) atom(["c", "a"])
   Fail: (16) atom(["c", "a"])
   Redo: (15) expression(["c", "a"])
   Unify: (15) expression(["c", "a"])
^  Call: (16) not(atom(["c", "a"]))
^  Unify: (16) not(user:atom(["c", "a"]))
^  Exit: (16) not(user:atom(["c", "a"]))
   Call: (16) length(["c", "a"], _G5680)
   Unify: (16) length(["c", "a"], _G5680)
   Exit: (16) length(["c", "a"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["c", "a"])
   Unify: (16) expression2(["c", "a"])
   Call: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) isval("c")
   Unify: (18) isval("c")
   Call: (19) number("c")
   Fail: (19) number("c")
   Fail: (18) isval("c")
   Redo: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) string("c")
   Exit: (18) string("c")
   Exit: (17) expression3("c")
   Call: (17) expression2(["a"])
   Unify: (17) expression2(["a"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["a"])
   Exit: (16) expression2(["c", "a"])
   Exit: (15) expression(["c", "a"])
   Exit: (14) isvalstrorundef(["c", "a"])
   Call: (14) updatevar([v, b], ["c", "a"], [[[v, c], ["c", "b"]]], _G5682)
   Unify: (14) updatevar([v, b], ["c", "a"], [[[v, c], ["c", "b"]]], _G5682)
   Call: (15) lists:member([[v, b], empty], [[[v, c], ["c", "b"]]])
   Unify: (15) lists:member([[v, b], empty], [[[v, c], ["c", "b"]]])
   Fail: (15) lists:member([[v, b], empty], [[[v, c], ["c", "b"]]])
   Redo: (14) updatevar([v, b], ["c", "a"], [[[v, c], ["c", "b"]]], _G5682)
^  Call: (15) not(member([[v, b], _G5678], [[[v, c], ["c", "b"]]]))
^  Unify: (15) not(user:member([[v, b], _G5678], [[[v, c], ["c", "b"]]]))
^  Exit: (15) not(user:member([[v, b], _G5678], [[[v, c], ["c", "b"]]]))
   Call: (15) _G5678=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, c], ["c", "b"]]], [[[v, b], ["c", "a"]]], _G5702)
   Unify: (15) lists:append([[[v, c], ["c", "b"]]], [[[v, b], ["c", "a"]]], [[[v, c], ["c", "b"]]|_G5694])
   Exit: (15) lists:append([[[v, c], ["c", "b"]]], [[[v, b], ["c", "a"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, b], ["c", "a"], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Exit: (13) putvalue([v, b], ["c", "a"], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5712)
   Unify: (15) length([v, d], _G5712)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5704|_G5705]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5720)
   Unify: (15) length([v, d], _G5720)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5706, [], _G5708)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5706, [], _G5708)
   Call: (14) [[v, d]]=[_G5696|_G5697]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5704|_G5705]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5720, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Unify: (14) getvalue([v, d], _G5720, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5720, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5719)
   Unify: (15) isvalstrorundef(_G5719)
   Call: (16) var(_G5719)
   Exit: (16) var(_G5719)
   Exit: (15) isvalstrorundef(_G5719)
   Call: (15) getvar([v, d], _G5720, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Unify: (15) getvar([v, d], _G5720, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Call: (16) lists:member([[v, d], _G5715], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Unify: (16) lists:member([[v, d], _G5715], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Fail: (16) lists:member([[v, d], _G5715], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Redo: (15) getvar([v, d], _G5720, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Unify: (15) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
^  Call: (16) not(member([[v, d], _G5718], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5718], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5718], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5734)
   Unify: (14) putvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5734)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5734)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5739)
   Unify: (15) updatevar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5739)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], _G5739)
^  Call: (16) not(member([[v, d], _G5735], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5735], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5735], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]]))
   Call: (16) _G5735=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, d], empty]], _G5759)
   Unify: (16) lists:append([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, d], empty]], [[[v, c], ["c", "b"]]|_G5751])
   Exit: (16) lists:append([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5774)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[v, d], [v, d]]], _G5777)
   Unify: (14) checkarguments([], [], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["c", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["c", "b"], ["c", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G15)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5765|_G5766]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5773|_G5774]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5782]]|_G5774]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5782]]|_G5774]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[_G5776], or, [_G5785]]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[_G5776], or, [_G5785]]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5773|_G5774]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5783, [[n, =], [[v, d], [v, c]]], _G5785)
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5774]]|_G5766]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5774]]|_G5766]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5768], or, [_G5777]]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5768], or, [_G5777]]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5775, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5765|_G5766]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5784, _G5785, _G5786)
   Unify: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5784, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5784)
   Unify: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5784)
   Call: (14) getvalues([v, d], [v, c], _G5782, _G5783, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, c], _G5782, _G5783, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5781, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5781, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5781, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5780)
   Unify: (16) isvalstrorundef(_G5780)
   Call: (17) var(_G5780)
   Exit: (17) var(_G5780)
   Exit: (16) isvalstrorundef(_G5780)
   Call: (16) getvar([v, d], _G5781, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5781, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5776], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5776], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5781, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5779], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5779], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5779], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, c], _G5787, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, c], _G5787, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, c]))
^  Unify: (16) not(user:isvar([v, c]))
   Call: (17) isvar([v, c])
   Unify: (17) isvar([v, c])
   Exit: (17) isvar([v, c])
^  Fail: (16) not(user:isvar([v, c]))
   Redo: (15) getvalue([v, c], _G5787, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, c])
   Unify: (16) isvar([v, c])
   Exit: (16) isvar([v, c])
   Call: (16) isvalstrorundef(_G5786)
   Unify: (16) isvalstrorundef(_G5786)
   Call: (17) var(_G5786)
   Exit: (17) var(_G5786)
   Exit: (16) isvalstrorundef(_G5786)
   Call: (16) getvar([v, c], _G5787, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, c], _G5787, [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, c], _G5782], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, c], _G5782], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, c], ["c", "b"]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (17) not(["c", "b"]=empty)
^  Unify: (17) not(user: (["c", "b"]=empty))
^  Exit: (17) not(user: (["c", "b"]=empty))
   Exit: (16) getvar([v, c], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, c], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, c], empty, ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) isval(["c", "b"])
   Unify: (15) isval(["c", "b"])
   Call: (16) number(["c", "b"])
   Fail: (16) number(["c", "b"])
   Fail: (15) isval(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) string(["c", "b"])
   Fail: (15) string(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
   Call: (15) atom(["c", "b"])
   Fail: (15) atom(["c", "b"])
   Redo: (14) expression(["c", "b"])
   Unify: (14) expression(["c", "b"])
^  Call: (15) not(atom(["c", "b"]))
^  Unify: (15) not(user:atom(["c", "b"]))
^  Exit: (15) not(user:atom(["c", "b"]))
   Call: (15) length(["c", "b"], _G5804)
   Unify: (15) length(["c", "b"], _G5804)
   Exit: (15) length(["c", "b"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["c", "b"])
   Unify: (15) expression2(["c", "b"])
   Call: (16) expression3("c")
   Unify: (16) expression3("c")
   Call: (17) isval("c")
   Unify: (17) isval("c")
   Call: (18) number("c")
   Fail: (18) number("c")
   Fail: (17) isval("c")
   Redo: (16) expression3("c")
   Unify: (16) expression3("c")
   Call: (17) string("c")
   Exit: (17) string("c")
   Exit: (16) expression3("c")
   Call: (16) expression2(["b"])
   Unify: (16) expression2(["b"])
   Call: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) isval("b")
   Unify: (18) isval("b")
   Call: (19) number("b")
   Fail: (19) number("b")
   Fail: (18) isval("b")
   Redo: (17) expression3("b")
   Unify: (17) expression3("b")
   Call: (18) string("b")
   Exit: (18) string("b")
   Exit: (17) expression3("b")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["b"])
   Exit: (15) expression2(["c", "b"])
   Exit: (14) expression(["c", "b"])
   Call: (14) val1emptyorvalsequal(empty, ["c", "b"])
   Unify: (14) val1emptyorvalsequal(empty, ["c", "b"])
   Exit: (14) val1emptyorvalsequal(empty, ["c", "b"])
   Call: (14) putvalue([v, d], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5806)
   Unify: (14) putvalue([v, d], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5806)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5806)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["c", "b"])
   Unify: (15) isvalstrorundef(["c", "b"])
   Call: (16) var(["c", "b"])
   Fail: (16) var(["c", "b"])
   Redo: (15) isvalstrorundef(["c", "b"])
   Unify: (15) isvalstrorundef(["c", "b"])
^  Call: (16) not(var(["c", "b"]))
^  Unify: (16) not(user:var(["c", "b"]))
^  Exit: (16) not(user:var(["c", "b"]))
   Call: (16) isval(["c", "b"])
   Unify: (16) isval(["c", "b"])
   Call: (17) number(["c", "b"])
   Fail: (17) number(["c", "b"])
   Fail: (16) isval(["c", "b"])
   Redo: (15) isvalstrorundef(["c", "b"])
   Unify: (15) isvalstrorundef(["c", "b"])
^  Call: (16) not(var(["c", "b"]))
^  Unify: (16) not(user:var(["c", "b"]))
^  Exit: (16) not(user:var(["c", "b"]))
   Call: (16) expression(["c", "b"])
   Unify: (16) expression(["c", "b"])
   Call: (17) isval(["c", "b"])
   Unify: (17) isval(["c", "b"])
   Call: (18) number(["c", "b"])
   Fail: (18) number(["c", "b"])
   Fail: (17) isval(["c", "b"])
   Redo: (16) expression(["c", "b"])
   Unify: (16) expression(["c", "b"])
   Call: (17) string(["c", "b"])
   Fail: (17) string(["c", "b"])
   Redo: (16) expression(["c", "b"])
   Unify: (16) expression(["c", "b"])
   Call: (17) atom(["c", "b"])
   Fail: (17) atom(["c", "b"])
   Redo: (16) expression(["c", "b"])
   Unify: (16) expression(["c", "b"])
^  Call: (17) not(atom(["c", "b"]))
^  Unify: (17) not(user:atom(["c", "b"]))
^  Exit: (17) not(user:atom(["c", "b"]))
   Call: (17) length(["c", "b"], _G5814)
   Unify: (17) length(["c", "b"], _G5814)
   Exit: (17) length(["c", "b"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["c", "b"])
   Unify: (17) expression2(["c", "b"])
   Call: (18) expression3("c")
   Unify: (18) expression3("c")
   Call: (19) isval("c")
   Unify: (19) isval("c")
   Call: (20) number("c")
   Fail: (20) number("c")
   Fail: (19) isval("c")
   Redo: (18) expression3("c")
   Unify: (18) expression3("c")
   Call: (19) string("c")
   Exit: (19) string("c")
   Exit: (18) expression3("c")
   Call: (18) expression2(["b"])
   Unify: (18) expression2(["b"])
   Call: (19) expression3("b")
   Unify: (19) expression3("b")
   Call: (20) isval("b")
   Unify: (20) isval("b")
   Call: (21) number("b")
   Fail: (21) number("b")
   Fail: (20) isval("b")
   Redo: (19) expression3("b")
   Unify: (19) expression3("b")
   Call: (20) string("b")
   Exit: (20) string("b")
   Exit: (19) expression3("b")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["b"])
   Exit: (17) expression2(["c", "b"])
   Exit: (16) expression(["c", "b"])
   Exit: (15) isvalstrorundef(["c", "b"])
   Call: (15) updatevar([v, d], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5816)
   Unify: (15) updatevar([v, d], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5816)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[v, d], empty], _G5827)
   Unify: (16) lists:delete([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[v, d], empty], _G5827)
   Exit: (16) lists:delete([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[v, d], empty], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]])
   Call: (16) lists:append([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, d], ["c", "b"]]], _G5842)
   Unify: (16) lists:append([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, d], ["c", "b"]]], [[[v, c], ["c", "b"]]|_G5834])
   Exit: (16) lists:append([[[v, c], ["c", "b"]], [[v, b], ["c", "a"]]], [[[v, d], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Exit: (14) putvalue([v, d], ["c", "b"], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5852=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], _G5855, [], _G5857)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [[[n, =], [[v, d], [v, c]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [], _G5855)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [], _G5855)
   Call: (12) [[[v, d], [v, d]]]=[[_G5848, _G5851]|_G5846]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5867)
   Unify: (13) length([v, d], _G5867)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [], _G5864)
   Call: (12) lists:member([[v, d], _G5857], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Unify: (12) lists:member([[v, d], _G5857], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Exit: (12) lists:member([[v, d], ["c", "b"]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]])
   Call: (12) lists:append([], [[[v, d], ["c", "b"]]], _G5878)
   Unify: (12) lists:append([], [[[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]])
   Exit: (12) lists:append([], [[[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]])
   Call: (12) updatevars([], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]], _G5879)
   Unify: (12) updatevars([], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]])
   Exit: (12) updatevars([], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["c", "b"]], [[v, b], ["c", "a"]], [[v, d], ["c", "b"]]], [], [[[v, d], ["c", "b"]]])
^  Call: (11) not([[[v, d], ["c", "b"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["c", "b"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["c", "b"]]]=[]))
   Call: (11) unique1([[[v, d], ["c", "b"]]], [], _G15)
   Unify: (11) unique1([[[v, d], ["c", "b"]]], [], _G15)
   Call: (12) lists:delete([], [[v, d], ["c", "b"]], _G5884)
   Unify: (12) lists:delete([], [[v, d], ["c", "b"]], [])
   Exit: (12) lists:delete([], [[v, d], ["c", "b"]], [])
   Call: (12) lists:append([], [[[v, d], ["c", "b"]]], _G5887)
   Unify: (12) lists:append([], [[[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]])
   Exit: (12) lists:append([], [[[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]])
   Call: (12) unique1([], [[[v, d], ["c", "b"]]], _G15)
   Unify: (12) unique1([], [[[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]])
   Exit: (12) unique1([], [[[v, d], ["c", "b"]]], [[[v, d], ["c", "b"]]])
   Exit: (11) unique1([[[v, d], ["c", "b"]]], [], [[[v, d], ["c", "b"]]])
   Call: (11) findresult3([["c", "b"], ["c", "a"], [v, d]], [[[v, d], ["c", "b"]]], [], _G5888)
   Unify: (11) findresult3([["c", "b"], ["c", "a"], [v, d]], [[[v, d], ["c", "b"]]], [], _G5888)
   Call: (12) [["c", "b"], ["c", "a"], [v, d]]=[_G5878|_G5879]
   Exit: (12) [["c", "b"], ["c", "a"], [v, d]]=[["c", "b"], ["c", "a"], [v, d]]
   Call: (12) expressionnotatom(["c", "b"])
   Unify: (12) expressionnotatom(["c", "b"])
   Call: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) var(["c", "b"])
   Fail: (14) var(["c", "b"])
   Redo: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) isval(["c", "b"])
   Unify: (14) isval(["c", "b"])
   Call: (15) number(["c", "b"])
   Fail: (15) number(["c", "b"])
   Fail: (14) isval(["c", "b"])
   Redo: (13) isvalstrempty(["c", "b"])
   Unify: (13) isvalstrempty(["c", "b"])
   Call: (14) string(["c", "b"])
   Fail: (14) string(["c", "b"])
   Fail: (13) isvalstrempty(["c", "b"])
   Redo: (12) expressionnotatom(["c", "b"])
   Unify: (12) expressionnotatom(["c", "b"])
^  Call: (13) not(atom(["c", "b"]))
^  Unify: (13) not(user:atom(["c", "b"]))
^  Exit: (13) not(user:atom(["c", "b"]))
   Call: (13) length(["c", "b"], _G5894)
   Unify: (13) length(["c", "b"], _G5894)
   Exit: (13) length(["c", "b"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["c", "b"])
   Unify: (13) expressionnotatom2(["c", "b"])
   Call: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) var("c")
   Fail: (15) var("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) isval("c")
   Unify: (15) isval("c")
   Call: (16) number("c")
   Fail: (16) number("c")
   Fail: (15) isval("c")
   Redo: (14) isvalstrempty("c")
   Unify: (14) isvalstrempty("c")
   Call: (15) string("c")
   Exit: (15) string("c")
   Exit: (14) isvalstrempty("c")
   Call: (14) expressionnotatom2(["b"])
   Unify: (14) expressionnotatom2(["b"])
   Call: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) var("b")
   Fail: (16) var("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) isval("b")
   Unify: (16) isval("b")
   Call: (17) number("b")
   Fail: (17) number("b")
   Fail: (16) isval("b")
   Redo: (15) isvalstrempty("b")
   Unify: (15) isvalstrempty("b")
   Call: (16) string("b")
   Exit: (16) string("b")
   Exit: (15) isvalstrempty("b")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["b"])
   Exit: (13) expressionnotatom2(["c", "b"])
   Exit: (12) expressionnotatom(["c", "b"])
   Call: (12) lists:append([], [["c", "b"]], _G5898)
   Unify: (12) lists:append([], [["c", "b"]], [["c", "b"]])
   Exit: (12) lists:append([], [["c", "b"]], [["c", "b"]])
   Call: (12) findresult3([["c", "a"], [v, d]], [[[v, d], ["c", "b"]]], [["c", "b"]], _G5899)
   Unify: (12) findresult3([["c", "a"], [v, d]], [[[v, d], ["c", "b"]]], [["c", "b"]], _G5899)
   Call: (13) [["c", "a"], [v, d]]=[_G5889|_G5890]
   Exit: (13) [["c", "a"], [v, d]]=[["c", "a"], [v, d]]
   Call: (13) expressionnotatom(["c", "a"])
   Unify: (13) expressionnotatom(["c", "a"])
   Call: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) var(["c", "a"])
   Fail: (15) var(["c", "a"])
   Redo: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) isval(["c", "a"])
   Unify: (15) isval(["c", "a"])
   Call: (16) number(["c", "a"])
   Fail: (16) number(["c", "a"])
   Fail: (15) isval(["c", "a"])
   Redo: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) string(["c", "a"])
   Fail: (15) string(["c", "a"])
   Fail: (14) isvalstrempty(["c", "a"])
   Redo: (13) expressionnotatom(["c", "a"])
   Unify: (13) expressionnotatom(["c", "a"])
^  Call: (14) not(atom(["c", "a"]))
^  Unify: (14) not(user:atom(["c", "a"]))
^  Exit: (14) not(user:atom(["c", "a"]))
   Call: (14) length(["c", "a"], _G5905)
   Unify: (14) length(["c", "a"], _G5905)
   Exit: (14) length(["c", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["c", "a"])
   Unify: (14) expressionnotatom2(["c", "a"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["c", "a"])
   Exit: (13) expressionnotatom(["c", "a"])
   Call: (13) lists:append([["c", "b"]], [["c", "a"]], _G5909)
   Unify: (13) lists:append([["c", "b"]], [["c", "a"]], [["c", "b"]|_G5901])
   Exit: (13) lists:append([["c", "b"]], [["c", "a"]], [["c", "b"], ["c", "a"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["c", "b"]]], [["c", "b"], ["c", "a"]], _G5913)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["c", "b"]]], [["c", "b"], ["c", "a"]], _G5913)
   Call: (14) [[v, d]]=[_G5903|_G5904]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5919)
   Unify: (15) length([v, d], _G5919)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["c", "b"]]], [["c", "b"], ["c", "a"]], _G5913)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["c", "b"]]], [["c", "b"], ["c", "a"]], _G5913)
   Call: (14) [[v, d]]=[_G5903|_G5904]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5909], [[[v, d], ["c", "b"]]])
   Unify: (14) lists:member([[v, d], _G5909], [[[v, d], ["c", "b"]]])
   Exit: (14) lists:member([[v, d], ["c", "b"]], [[[v, d], ["c", "b"]]])
   Call: (14) lists:append([["c", "b"], ["c", "a"]], [["c", "b"]], _G5924)
   Unify: (14) lists:append([["c", "b"], ["c", "a"]], [["c", "b"]], [["c", "b"]|_G5916])
   Exit: (14) lists:append([["c", "b"], ["c", "a"]], [["c", "b"]], [["c", "b"], ["c", "a"], ["c", "b"]])
   Call: (14) findresult3([], [[[v, d], ["c", "b"]]], [["c", "b"], ["c", "a"], ["c", "b"]], _G5931)
   Unify: (14) findresult3([], [[[v, d], ["c", "b"]]], [["c", "b"], ["c", "a"], ["c", "b"]], [["c", "b"], ["c", "a"], ["c", "b"]])
   Exit: (14) findresult3([], [[[v, d], ["c", "b"]]], [["c", "b"], ["c", "a"], ["c", "b"]], [["c", "b"], ["c", "a"], ["c", "b"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["c", "b"]]], [["c", "b"], ["c", "a"]], [["c", "b"], ["c", "a"], ["c", "b"]])
   Exit: (12) findresult3([["c", "a"], [v, d]], [[[v, d], ["c", "b"]]], [["c", "b"]], [["c", "b"], ["c", "a"], ["c", "b"]])
   Exit: (11) findresult3([["c", "b"], ["c", "a"], [v, d]], [[[v, d], ["c", "b"]]], [], [["c", "b"], ["c", "a"], ["c", "b"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["c", "b"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["c", "b"]]])
   Exit: (9) interpret1(off, [[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["c", "b"]]])
   Exit: (8) interpret(off, [[n, f], [["c", "b"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["c", "b"]]])

   Call: (8) interpret(off, [[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
   Unify: (8) interpret(off, [[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
   Call: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555)
   Unify: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555)
   Call: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555, [], _G5557)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555, [], _G5557)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5546|_G5547]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5555], _G5558, "->", _G5567]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5555], _G5558, "->", _G5567]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5558, [], _G5560)
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5555], "->", _G5564]
   Fail: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, _G5555], "->", _G5564]
   Redo: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555, [], _G5557)
   Unify: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], _G5555, [], _G5557)
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[_G5546|_G5547]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[_G5549, _G5552, ":-", _G5561]
   Exit: (11) [[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]=[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n, =], [[...|...]|...]]]]
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Call: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], _G5576)
   Unify: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (11) lists:append([], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Call: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G5576, [], _G5578)
   Unify: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (11) convert_to_grammar_part11([], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Exit: (10) convert_to_grammar_part11([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [])
   Call: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], _G5576)
   Unify: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]|_G5568])
   Exit: (10) lists:append([[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]], [], [[[n, f], [[v, c], [v, b], [v|...]], ":-", [[[...|...]|...]]]])
   Exit: (9) convert_to_grammar_part1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]])
   Call: (9) interpret1(off, [[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
   Unify: (9) interpret1(off, [[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
^  Call: (10) retractall(debug(_G5570))
^  Exit: (10) retractall(debug(_G5570))
^  Call: (10) assertz(debug(off))
^  Exit: (10) assertz(debug(off))
^  Call: (10) retractall(cut(_G5574))
^  Exit: (10) retractall(cut(_G5574))
^  Call: (10) assertz(cut(off))
^  Exit: (10) assertz(cut(off))
   Call: (10) member1([[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
   Unify: (10) member1([[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
   Call: (11) cut(off)
   Unify: (11) cut(off)
   Exit: (11) cut(off)
   Call: (11) [[n, f], [["b", "a"], ["c", "a"], [v, d]]]=[_G5578, _G5581]
   Exit: (11) [[n, f], [["b", "a"], ["c", "a"], [v, d]]]=[[n, f], [["b", "a"], ["c", "a"], [v, d]]]
   Call: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], _G5590, ":-", _G5599]|_G5585]
   Exit: (11) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (11) length([["b", "a"], ["c", "a"], [v, d]], _G5610)
   Unify: (11) length([["b", "a"], ["c", "a"], [v, d]], _G5610)
   Exit: (11) length([["b", "a"], ["c", "a"], [v, d]], 3)
   Call: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Unify: (11) length([[v, c], [v, b], [v, d]], 3)
   Exit: (11) length([[v, c], [v, b], [v, d]], 3)
   Call: (11) [n, f]=[n, grammar]
   Fail: (11) [n, f]=[n, grammar]
   Redo: (10) member1([[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
   Call: (11) [n, f]=[n, grammar_part]
   Fail: (11) [n, f]=[n, grammar_part]
   Redo: (10) member1([[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
   Call: (11) checkarguments([["b", "a"], ["c", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5612, [], _G5614)
   Unify: (11) checkarguments([["b", "a"], ["c", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], _G5612, [], _G5614)
   Call: (12) [["b", "a"], ["c", "a"], [v, d]]=[_G5602|_G5603]
   Exit: (12) [["b", "a"], ["c", "a"], [v, d]]=[["b", "a"], ["c", "a"], [v, d]]
   Call: (12) expressionnotatom(["b", "a"])
   Unify: (12) expressionnotatom(["b", "a"])
   Call: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) var(["b", "a"])
   Fail: (14) var(["b", "a"])
   Redo: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) isval(["b", "a"])
   Unify: (14) isval(["b", "a"])
   Call: (15) number(["b", "a"])
   Fail: (15) number(["b", "a"])
   Fail: (14) isval(["b", "a"])
   Redo: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) string(["b", "a"])
   Fail: (14) string(["b", "a"])
   Fail: (13) isvalstrempty(["b", "a"])
   Redo: (12) expressionnotatom(["b", "a"])
   Unify: (12) expressionnotatom(["b", "a"])
^  Call: (13) not(atom(["b", "a"]))
^  Unify: (13) not(user:atom(["b", "a"]))
^  Exit: (13) not(user:atom(["b", "a"]))
   Call: (13) length(["b", "a"], _G5618)
   Unify: (13) length(["b", "a"], _G5618)
   Exit: (13) length(["b", "a"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["b", "a"])
   Unify: (13) expressionnotatom2(["b", "a"])
   Call: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) var("b")
   Fail: (15) var("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) isval("b")
   Unify: (15) isval("b")
   Call: (16) number("b")
   Fail: (16) number("b")
   Fail: (15) isval("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) string("b")
   Exit: (15) string("b")
   Exit: (14) isvalstrempty("b")
   Call: (14) expressionnotatom2(["a"])
   Unify: (14) expressionnotatom2(["a"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["a"])
   Exit: (13) expressionnotatom2(["b", "a"])
   Exit: (12) expressionnotatom(["b", "a"])
   Call: (12) [[v, c], [v, b], [v, d]]=[_G5610|_G5611]
   Exit: (12) [[v, c], [v, b], [v, d]]=[[v, c], [v, b], [v, d]]
^  Call: (12) not(var([v, c]))
^  Unify: (12) not(user:var([v, c]))
^  Exit: (12) not(user:var([v, c]))
   Call: (12) isvar([v, c])
   Unify: (12) isvar([v, c])
   Exit: (12) isvar([v, c])
   Call: (12) putvalue([v, c], ["b", "a"], [], _G5628)
   Unify: (12) putvalue([v, c], ["b", "a"], [], _G5628)
^  Call: (13) not(isvar([v, c]))
^  Unify: (13) not(user:isvar([v, c]))
   Call: (14) isvar([v, c])
   Unify: (14) isvar([v, c])
   Exit: (14) isvar([v, c])
^  Fail: (13) not(user:isvar([v, c]))
   Redo: (12) putvalue([v, c], ["b", "a"], [], _G5628)
   Call: (13) isvar([v, c])
   Unify: (13) isvar([v, c])
   Exit: (13) isvar([v, c])
   Call: (13) isvalstrorundef(["b", "a"])
   Unify: (13) isvalstrorundef(["b", "a"])
   Call: (14) var(["b", "a"])
   Fail: (14) var(["b", "a"])
   Redo: (13) isvalstrorundef(["b", "a"])
   Unify: (13) isvalstrorundef(["b", "a"])
^  Call: (14) not(var(["b", "a"]))
^  Unify: (14) not(user:var(["b", "a"]))
^  Exit: (14) not(user:var(["b", "a"]))
   Call: (14) isval(["b", "a"])
   Unify: (14) isval(["b", "a"])
   Call: (15) number(["b", "a"])
   Fail: (15) number(["b", "a"])
   Fail: (14) isval(["b", "a"])
   Redo: (13) isvalstrorundef(["b", "a"])
   Unify: (13) isvalstrorundef(["b", "a"])
^  Call: (14) not(var(["b", "a"]))
^  Unify: (14) not(user:var(["b", "a"]))
^  Exit: (14) not(user:var(["b", "a"]))
   Call: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) atom(["b", "a"])
   Fail: (15) atom(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
^  Call: (15) not(atom(["b", "a"]))
^  Unify: (15) not(user:atom(["b", "a"]))
^  Exit: (15) not(user:atom(["b", "a"]))
   Call: (15) length(["b", "a"], _G5636)
   Unify: (15) length(["b", "a"], _G5636)
   Exit: (15) length(["b", "a"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "a"])
   Unify: (15) expression2(["b", "a"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["a"])
   Unify: (16) expression2(["a"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["a"])
   Exit: (15) expression2(["b", "a"])
   Exit: (14) expression(["b", "a"])
   Exit: (13) isvalstrorundef(["b", "a"])
   Call: (13) updatevar([v, c], ["b", "a"], [], _G5638)
   Unify: (13) updatevar([v, c], ["b", "a"], [], _G5638)
   Call: (14) lists:member([[v, c], empty], [])
   Fail: (14) lists:member([[v, c], empty], [])
   Redo: (13) updatevar([v, c], ["b", "a"], [], _G5638)
^  Call: (14) not(member([[v, c], _G5634], []))
^  Unify: (14) not(user:member([[v, c], _G5634], []))
^  Exit: (14) not(user:member([[v, c], _G5634], []))
   Call: (14) _G5634=empty
   Exit: (14) empty=empty
   Call: (14) true
   Exit: (14) true
   Call: (14) lists:append([], [[[v, c], ["b", "a"]]], _G5658)
   Unify: (14) lists:append([], [[[v, c], ["b", "a"]]], [[[v, c], ["b", "a"]]])
   Exit: (14) lists:append([], [[[v, c], ["b", "a"]]], [[[v, c], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) true
   Exit: (14) true
   Exit: (13) updatevar([v, c], ["b", "a"], [], [[[v, c], ["b", "a"]]])
   Exit: (12) putvalue([v, c], ["b", "a"], [], [[[v, c], ["b", "a"]]])
   Call: (12) checkarguments([["c", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "a"]]], _G5659, [], _G5661)
   Unify: (12) checkarguments([["c", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "a"]]], _G5659, [], _G5661)
   Call: (13) [["c", "a"], [v, d]]=[_G5649|_G5650]
   Exit: (13) [["c", "a"], [v, d]]=[["c", "a"], [v, d]]
   Call: (13) expressionnotatom(["c", "a"])
   Unify: (13) expressionnotatom(["c", "a"])
   Call: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) var(["c", "a"])
   Fail: (15) var(["c", "a"])
   Redo: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) isval(["c", "a"])
   Unify: (15) isval(["c", "a"])
   Call: (16) number(["c", "a"])
   Fail: (16) number(["c", "a"])
   Fail: (15) isval(["c", "a"])
   Redo: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) string(["c", "a"])
   Fail: (15) string(["c", "a"])
   Fail: (14) isvalstrempty(["c", "a"])
   Redo: (13) expressionnotatom(["c", "a"])
   Unify: (13) expressionnotatom(["c", "a"])
^  Call: (14) not(atom(["c", "a"]))
^  Unify: (14) not(user:atom(["c", "a"]))
^  Exit: (14) not(user:atom(["c", "a"]))
   Call: (14) length(["c", "a"], _G5665)
   Unify: (14) length(["c", "a"], _G5665)
   Exit: (14) length(["c", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["c", "a"])
   Unify: (14) expressionnotatom2(["c", "a"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["c", "a"])
   Exit: (13) expressionnotatom(["c", "a"])
   Call: (13) [[v, b], [v, d]]=[_G5657|_G5658]
   Exit: (13) [[v, b], [v, d]]=[[v, b], [v, d]]
^  Call: (13) not(var([v, b]))
^  Unify: (13) not(user:var([v, b]))
^  Exit: (13) not(user:var([v, b]))
   Call: (13) isvar([v, b])
   Unify: (13) isvar([v, b])
   Exit: (13) isvar([v, b])
   Call: (13) putvalue([v, b], ["c", "a"], [[[v, c], ["b", "a"]]], _G5675)
   Unify: (13) putvalue([v, b], ["c", "a"], [[[v, c], ["b", "a"]]], _G5675)
^  Call: (14) not(isvar([v, b]))
^  Unify: (14) not(user:isvar([v, b]))
   Call: (15) isvar([v, b])
   Unify: (15) isvar([v, b])
   Exit: (15) isvar([v, b])
^  Fail: (14) not(user:isvar([v, b]))
   Redo: (13) putvalue([v, b], ["c", "a"], [[[v, c], ["b", "a"]]], _G5675)
   Call: (14) isvar([v, b])
   Unify: (14) isvar([v, b])
   Exit: (14) isvar([v, b])
   Call: (14) isvalstrorundef(["c", "a"])
   Unify: (14) isvalstrorundef(["c", "a"])
   Call: (15) var(["c", "a"])
   Fail: (15) var(["c", "a"])
   Redo: (14) isvalstrorundef(["c", "a"])
   Unify: (14) isvalstrorundef(["c", "a"])
^  Call: (15) not(var(["c", "a"]))
^  Unify: (15) not(user:var(["c", "a"]))
^  Exit: (15) not(user:var(["c", "a"]))
   Call: (15) isval(["c", "a"])
   Unify: (15) isval(["c", "a"])
   Call: (16) number(["c", "a"])
   Fail: (16) number(["c", "a"])
   Fail: (15) isval(["c", "a"])
   Redo: (14) isvalstrorundef(["c", "a"])
   Unify: (14) isvalstrorundef(["c", "a"])
^  Call: (15) not(var(["c", "a"]))
^  Unify: (15) not(user:var(["c", "a"]))
^  Exit: (15) not(user:var(["c", "a"]))
   Call: (15) expression(["c", "a"])
   Unify: (15) expression(["c", "a"])
   Call: (16) isval(["c", "a"])
   Unify: (16) isval(["c", "a"])
   Call: (17) number(["c", "a"])
   Fail: (17) number(["c", "a"])
   Fail: (16) isval(["c", "a"])
   Redo: (15) expression(["c", "a"])
   Unify: (15) expression(["c", "a"])
   Call: (16) string(["c", "a"])
   Fail: (16) string(["c", "a"])
   Redo: (15) expression(["c", "a"])
   Unify: (15) expression(["c", "a"])
   Call: (16) atom(["c", "a"])
   Fail: (16) atom(["c", "a"])
   Redo: (15) expression(["c", "a"])
   Unify: (15) expression(["c", "a"])
^  Call: (16) not(atom(["c", "a"]))
^  Unify: (16) not(user:atom(["c", "a"]))
^  Exit: (16) not(user:atom(["c", "a"]))
   Call: (16) length(["c", "a"], _G5683)
   Unify: (16) length(["c", "a"], _G5683)
   Exit: (16) length(["c", "a"], 2)
   Call: (16) 2>=1
   Exit: (16) 2>=1
   Call: (16) expression2(["c", "a"])
   Unify: (16) expression2(["c", "a"])
   Call: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) isval("c")
   Unify: (18) isval("c")
   Call: (19) number("c")
   Fail: (19) number("c")
   Fail: (18) isval("c")
   Redo: (17) expression3("c")
   Unify: (17) expression3("c")
   Call: (18) string("c")
   Exit: (18) string("c")
   Exit: (17) expression3("c")
   Call: (17) expression2(["a"])
   Unify: (17) expression2(["a"])
   Call: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) isval("a")
   Unify: (19) isval("a")
   Call: (20) number("a")
   Fail: (20) number("a")
   Fail: (19) isval("a")
   Redo: (18) expression3("a")
   Unify: (18) expression3("a")
   Call: (19) string("a")
   Exit: (19) string("a")
   Exit: (18) expression3("a")
   Call: (18) expression2([])
   Unify: (18) expression2([])
   Exit: (18) expression2([])
   Exit: (17) expression2(["a"])
   Exit: (16) expression2(["c", "a"])
   Exit: (15) expression(["c", "a"])
   Exit: (14) isvalstrorundef(["c", "a"])
   Call: (14) updatevar([v, b], ["c", "a"], [[[v, c], ["b", "a"]]], _G5685)
   Unify: (14) updatevar([v, b], ["c", "a"], [[[v, c], ["b", "a"]]], _G5685)
   Call: (15) lists:member([[v, b], empty], [[[v, c], ["b", "a"]]])
   Unify: (15) lists:member([[v, b], empty], [[[v, c], ["b", "a"]]])
   Fail: (15) lists:member([[v, b], empty], [[[v, c], ["b", "a"]]])
   Redo: (14) updatevar([v, b], ["c", "a"], [[[v, c], ["b", "a"]]], _G5685)
^  Call: (15) not(member([[v, b], _G5681], [[[v, c], ["b", "a"]]]))
^  Unify: (15) not(user:member([[v, b], _G5681], [[[v, c], ["b", "a"]]]))
^  Exit: (15) not(user:member([[v, b], _G5681], [[[v, c], ["b", "a"]]]))
   Call: (15) _G5681=empty
   Exit: (15) empty=empty
   Call: (15) true
   Exit: (15) true
   Call: (15) lists:append([[[v, c], ["b", "a"]]], [[[v, b], ["c", "a"]]], _G5705)
   Unify: (15) lists:append([[[v, c], ["b", "a"]]], [[[v, b], ["c", "a"]]], [[[v, c], ["b", "a"]]|_G5697])
   Exit: (15) lists:append([[[v, c], ["b", "a"]]], [[[v, b], ["c", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Call: (15) true
   Exit: (15) true
   Call: (15) true
   Exit: (15) true
   Exit: (14) updatevar([v, b], ["c", "a"], [[[v, c], ["b", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Exit: (13) putvalue([v, b], ["c", "a"], [[[v, c], ["b", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Call: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5709, [], _G5711)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5709, [], _G5711)
   Call: (14) [[v, d]]=[_G5699|_G5700]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5715)
   Unify: (15) length([v, d], _G5715)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5709, [], _G5711)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5709, [], _G5711)
   Call: (14) [[v, d]]=[_G5699|_G5700]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5707|_G5708]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5723)
   Unify: (15) length([v, d], _G5723)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5709, [], _G5711)
   Unify: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5709, [], _G5711)
   Call: (14) [[v, d]]=[_G5699|_G5700]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) [[v, d]]=[_G5707|_G5708]
   Exit: (14) [[v, d]]=[[v, d]]
^  Call: (14) not(var([v, d]))
^  Unify: (14) not(user:var([v, d]))
^  Exit: (14) not(user:var([v, d]))
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) getvalue([v, d], _G5723, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Unify: (14) getvalue([v, d], _G5723, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) getvalue([v, d], _G5723, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(_G5722)
   Unify: (15) isvalstrorundef(_G5722)
   Call: (16) var(_G5722)
   Exit: (16) var(_G5722)
   Exit: (15) isvalstrorundef(_G5722)
   Call: (15) getvar([v, d], _G5723, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Unify: (15) getvar([v, d], _G5723, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Call: (16) lists:member([[v, d], _G5718], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Unify: (16) lists:member([[v, d], _G5718], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Fail: (16) lists:member([[v, d], _G5718], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Redo: (15) getvar([v, d], _G5723, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Unify: (15) getvar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
^  Call: (16) not(member([[v, d], _G5721], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5721], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5721], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]]))
   Call: (16) true
   Exit: (16) true
   Exit: (15) getvar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Exit: (14) getvalue([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) putvalue([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5737)
   Unify: (14) putvalue([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5737)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5737)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
   Call: (16) var(empty)
   Fail: (16) var(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) isval(empty)
   Unify: (16) isval(empty)
   Call: (17) number(empty)
   Fail: (17) number(empty)
   Fail: (16) isval(empty)
   Redo: (15) isvalstrorundef(empty)
   Unify: (15) isvalstrorundef(empty)
^  Call: (16) not(var(empty))
^  Unify: (16) not(user:var(empty))
^  Exit: (16) not(user:var(empty))
   Call: (16) expression(empty)
   Unify: (16) expression(empty)
   Exit: (16) expression(empty)
   Exit: (15) isvalstrorundef(empty)
   Call: (15) updatevar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5742)
   Unify: (15) updatevar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5742)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Fail: (16) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Redo: (15) updatevar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], _G5742)
^  Call: (16) not(member([[v, d], _G5738], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]]))
^  Unify: (16) not(user:member([[v, d], _G5738], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]]))
^  Exit: (16) not(user:member([[v, d], _G5738], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]]))
   Call: (16) _G5738=empty
   Exit: (16) empty=empty
   Call: (16) true
   Exit: (16) true
   Call: (16) lists:append([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, d], empty]], _G5762)
   Unify: (16) lists:append([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, d], empty]], [[[v, c], ["b", "a"]]|_G5754])
   Exit: (16) lists:append([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (14) putvalue([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (14) lists:append([], [[[v, d], [v, d]]], _G5777)
   Unify: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) lists:append([], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Call: (14) checkarguments([], [], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[v, d], [v, d]]], _G5780)
   Unify: (14) checkarguments([], [], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (14) checkarguments([], [], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, d], [v, d]]], [[[v, d], [v, d]]])
   Exit: (13) checkarguments([[v, d]], [[v, d]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (12) checkarguments([["c", "a"], [v, d]], [[v, b], [v, d]], [[[v, c], ["b", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Exit: (11) checkarguments([["b", "a"], ["c", "a"], [v, d]], [[v, c], [v, b], [v, d]], [], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [], [[[v, d], [v, d]]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], _G18)
   Call: (11) true
   Exit: (11) true
   Call: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5768|_G5769]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5776|_G5777]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5785]]|_G5777]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[not, [_G5785]]|_G5777]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[[_G5779], or, [_G5788]]
   Fail: (13) [[n, =], [[v, d], [v, c]]]=[[_G5779], or, [_G5788]]
   Redo: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Call: (13) [[n, =], [[v, d], [v, c]]]=[_G5776|_G5777]
   Exit: (13) [[n, =], [[v, d], [v, c]]]=[[n, =], [[v, d], [v, c]]]
^  Call: (13) not(predicate_or_rule_name([n, =]))
^  Unify: (13) not(user:predicate_or_rule_name([n, =]))
   Call: (14) predicate_or_rule_name([n, =])
   Unify: (14) predicate_or_rule_name([n, =])
   Exit: (14) predicate_or_rule_name([n, =])
^  Fail: (13) not(user:predicate_or_rule_name([n, =]))
   Fail: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5786, [[n, =], [[v, d], [v, c]]], _G5788)
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5777]]|_G5769]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[not, [_G5777]]|_G5769]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5771], or, [_G5780]]
   Fail: (12) [[[n, =], [[v, d], [v, c]]]]=[[_G5771], or, [_G5780]]
   Redo: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[n, =], [[v, d], [v, c]]]], true)
   Unify: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5778, [[[n, =], [[v, d], [v, c]]]], true)
   Call: (12) [[[n, =], [[v, d], [v, c]]]]=[_G5768|_G5769]
   Exit: (12) [[[n, =], [[v, d], [v, c]]]]=[[[n, =], [[v, d], [v, c]]]]
^  Call: (12) not(predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
^  Unify: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
   Fail: (13) predicate_or_rule_name([[n, =], [[v, d], [v, c]]])
^  Exit: (12) not(user:predicate_or_rule_name([[n, =], [[v, d], [v, c]]]))
   Call: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5787, _G5788, _G5789)
   Unify: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5787, true, nocut)
   Call: (13) isop(=)
   Unify: (13) isop(=)
   Exit: (13) isop(=)
   Call: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5787)
   Unify: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5787)
   Call: (14) getvalues([v, d], [v, c], _G5785, _G5786, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (14) getvalues([v, d], [v, c], _G5785, _G5786, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, d], _G5784, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, d], _G5784, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, d]))
^  Unify: (16) not(user:isvar([v, d]))
   Call: (17) isvar([v, d])
   Unify: (17) isvar([v, d])
   Exit: (17) isvar([v, d])
^  Fail: (16) not(user:isvar([v, d]))
   Redo: (15) getvalue([v, d], _G5784, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
   Call: (16) isvalstrorundef(_G5783)
   Unify: (16) isvalstrorundef(_G5783)
   Call: (17) var(_G5783)
   Exit: (17) var(_G5783)
   Exit: (16) isvalstrorundef(_G5783)
   Call: (16) getvar([v, d], _G5784, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], _G5784, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], _G5779], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], _G5779], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (17) not(empty=empty)
^  Unify: (17) not(user: (empty=empty))
^  Fail: (17) not(user: (empty=empty))
   Redo: (16) getvar([v, d], _G5784, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (17) not(member([[v, d], _G5782], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]]))
^  Unify: (17) not(user:member([[v, d], _G5782], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]]))
^  Fail: (17) not(user:member([[v, d], _G5782], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]]))
   Redo: (16) getvar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (16) getvar([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, d], empty, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (15) getvalue([v, c], _G5790, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (15) getvalue([v, c], _G5790, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (16) not(isvar([v, c]))
^  Unify: (16) not(user:isvar([v, c]))
   Call: (17) isvar([v, c])
   Unify: (17) isvar([v, c])
   Exit: (17) isvar([v, c])
^  Fail: (16) not(user:isvar([v, c]))
   Redo: (15) getvalue([v, c], _G5790, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (16) isvar([v, c])
   Unify: (16) isvar([v, c])
   Exit: (16) isvar([v, c])
   Call: (16) isvalstrorundef(_G5789)
   Unify: (16) isvalstrorundef(_G5789)
   Call: (17) var(_G5789)
   Exit: (17) var(_G5789)
   Exit: (16) isvalstrorundef(_G5789)
   Call: (16) getvar([v, c], _G5790, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (16) getvar([v, c], _G5790, [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (17) lists:member([[v, c], _G5785], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (17) lists:member([[v, c], _G5785], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (17) lists:member([[v, c], ["b", "a"]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
^  Call: (17) not(["b", "a"]=empty)
^  Unify: (17) not(user: (["b", "a"]=empty))
^  Exit: (17) not(user: (["b", "a"]=empty))
   Exit: (16) getvar([v, c], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (15) getvalue([v, c], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (14) getvalues([v, d], [v, c], empty, ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (14) expression(empty)
   Unify: (14) expression(empty)
   Exit: (14) expression(empty)
   Call: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) isval(["b", "a"])
   Unify: (15) isval(["b", "a"])
   Call: (16) number(["b", "a"])
   Fail: (16) number(["b", "a"])
   Fail: (15) isval(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) string(["b", "a"])
   Fail: (15) string(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
   Call: (15) atom(["b", "a"])
   Fail: (15) atom(["b", "a"])
   Redo: (14) expression(["b", "a"])
   Unify: (14) expression(["b", "a"])
^  Call: (15) not(atom(["b", "a"]))
^  Unify: (15) not(user:atom(["b", "a"]))
^  Exit: (15) not(user:atom(["b", "a"]))
   Call: (15) length(["b", "a"], _G5807)
   Unify: (15) length(["b", "a"], _G5807)
   Exit: (15) length(["b", "a"], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expression2(["b", "a"])
   Unify: (15) expression2(["b", "a"])
   Call: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) isval("b")
   Unify: (17) isval("b")
   Call: (18) number("b")
   Fail: (18) number("b")
   Fail: (17) isval("b")
   Redo: (16) expression3("b")
   Unify: (16) expression3("b")
   Call: (17) string("b")
   Exit: (17) string("b")
   Exit: (16) expression3("b")
   Call: (16) expression2(["a"])
   Unify: (16) expression2(["a"])
   Call: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) isval("a")
   Unify: (18) isval("a")
   Call: (19) number("a")
   Fail: (19) number("a")
   Fail: (18) isval("a")
   Redo: (17) expression3("a")
   Unify: (17) expression3("a")
   Call: (18) string("a")
   Exit: (18) string("a")
   Exit: (17) expression3("a")
   Call: (17) expression2([])
   Unify: (17) expression2([])
   Exit: (17) expression2([])
   Exit: (16) expression2(["a"])
   Exit: (15) expression2(["b", "a"])
   Exit: (14) expression(["b", "a"])
   Call: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Unify: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Exit: (14) val1emptyorvalsequal(empty, ["b", "a"])
   Call: (14) putvalue([v, d], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5809)
   Unify: (14) putvalue([v, d], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5809)
^  Call: (15) not(isvar([v, d]))
^  Unify: (15) not(user:isvar([v, d]))
   Call: (16) isvar([v, d])
   Unify: (16) isvar([v, d])
   Exit: (16) isvar([v, d])
^  Fail: (15) not(user:isvar([v, d]))
   Redo: (14) putvalue([v, d], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5809)
   Call: (15) isvar([v, d])
   Unify: (15) isvar([v, d])
   Exit: (15) isvar([v, d])
   Call: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
   Call: (16) var(["b", "a"])
   Fail: (16) var(["b", "a"])
   Redo: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
^  Call: (16) not(var(["b", "a"]))
^  Unify: (16) not(user:var(["b", "a"]))
^  Exit: (16) not(user:var(["b", "a"]))
   Call: (16) isval(["b", "a"])
   Unify: (16) isval(["b", "a"])
   Call: (17) number(["b", "a"])
   Fail: (17) number(["b", "a"])
   Fail: (16) isval(["b", "a"])
   Redo: (15) isvalstrorundef(["b", "a"])
   Unify: (15) isvalstrorundef(["b", "a"])
^  Call: (16) not(var(["b", "a"]))
^  Unify: (16) not(user:var(["b", "a"]))
^  Exit: (16) not(user:var(["b", "a"]))
   Call: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) isval(["b", "a"])
   Unify: (17) isval(["b", "a"])
   Call: (18) number(["b", "a"])
   Fail: (18) number(["b", "a"])
   Fail: (17) isval(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) string(["b", "a"])
   Fail: (17) string(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
   Call: (17) atom(["b", "a"])
   Fail: (17) atom(["b", "a"])
   Redo: (16) expression(["b", "a"])
   Unify: (16) expression(["b", "a"])
^  Call: (17) not(atom(["b", "a"]))
^  Unify: (17) not(user:atom(["b", "a"]))
^  Exit: (17) not(user:atom(["b", "a"]))
   Call: (17) length(["b", "a"], _G5817)
   Unify: (17) length(["b", "a"], _G5817)
   Exit: (17) length(["b", "a"], 2)
   Call: (17) 2>=1
   Exit: (17) 2>=1
   Call: (17) expression2(["b", "a"])
   Unify: (17) expression2(["b", "a"])
   Call: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) isval("b")
   Unify: (19) isval("b")
   Call: (20) number("b")
   Fail: (20) number("b")
   Fail: (19) isval("b")
   Redo: (18) expression3("b")
   Unify: (18) expression3("b")
   Call: (19) string("b")
   Exit: (19) string("b")
   Exit: (18) expression3("b")
   Call: (18) expression2(["a"])
   Unify: (18) expression2(["a"])
   Call: (19) expression3("a")
   Unify: (19) expression3("a")
   Call: (20) isval("a")
   Unify: (20) isval("a")
   Call: (21) number("a")
   Fail: (21) number("a")
   Fail: (20) isval("a")
   Redo: (19) expression3("a")
   Unify: (19) expression3("a")
   Call: (20) string("a")
   Exit: (20) string("a")
   Exit: (19) expression3("a")
   Call: (19) expression2([])
   Unify: (19) expression2([])
   Exit: (19) expression2([])
   Exit: (18) expression2(["a"])
   Exit: (17) expression2(["b", "a"])
   Exit: (16) expression(["b", "a"])
   Exit: (15) isvalstrorundef(["b", "a"])
   Call: (15) updatevar([v, d], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5819)
   Unify: (15) updatevar([v, d], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], _G5819)
   Call: (16) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Unify: (16) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Exit: (16) lists:member([[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]])
   Call: (16) lists:delete([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[v, d], empty], _G5830)
   Unify: (16) lists:delete([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[v, d], empty], _G5830)
   Exit: (16) lists:delete([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[v, d], empty], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]])
   Call: (16) lists:append([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, d], ["b", "a"]]], _G5845)
   Unify: (16) lists:append([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, d], ["b", "a"]]], [[[v, c], ["b", "a"]]|_G5837])
   Exit: (16) lists:append([[[v, c], ["b", "a"]], [[v, b], ["c", "a"]]], [[[v, d], ["b", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Call: (16) true
   Exit: (16) true
   Exit: (15) updatevar([v, d], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Exit: (14) putvalue([v, d], ["b", "a"], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Call: (14) debug(on)
   Fail: (14) debug(on)
   Redo: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Call: (14) true
   Exit: (14) true
   Exit: (13) interpretpart(is, [v, d], [v, c], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Exit: (12) interpretstatement1([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[n, =], [[v, d], [v, c]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], true, nocut)
^  Call: (12) not(nocut=cut)
^  Unify: (12) not(user: (nocut=cut))
^  Exit: (12) not(user: (nocut=cut))
   Call: (12) _G5855=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Exit: (12) [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]=[[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]]
   Call: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], _G5858, [], _G5860)
   Unify: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [], true)
   Exit: (12) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [], true)
   Call: (12) logicalconjunction(true, true, true)
   Unify: (12) logicalconjunction(true, true, true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Call: (13) true(true)
   Unify: (13) true(true)
   Exit: (13) true(true)
   Exit: (12) logicalconjunction(true, true, true)
   Exit: (11) interpretbody([[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], empty]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [[[n, =], [[v, d], [v, c]]]], true)
   Call: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [], _G5858)
   Unify: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [], _G5858)
   Call: (12) [[[v, d], [v, d]]]=[[_G5851, _G5854]|_G5849]
   Exit: (12) [[[v, d], [v, d]]]=[[[v, d], [v, d]]]
   Call: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) var([v, d])
   Fail: (14) var([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) isval([v, d])
   Unify: (14) isval([v, d])
   Call: (15) number([v, d])
   Fail: (15) number([v, d])
   Fail: (14) isval([v, d])
   Redo: (13) isvalstrempty([v, d])
   Unify: (13) isvalstrempty([v, d])
   Call: (14) string([v, d])
   Fail: (14) string([v, d])
   Fail: (13) isvalstrempty([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
^  Call: (13) not(atom([v, d]))
^  Unify: (13) not(user:atom([v, d]))
^  Exit: (13) not(user:atom([v, d]))
   Call: (13) length([v, d], _G5870)
   Unify: (13) length([v, d], _G5870)
   Exit: (13) length([v, d], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2([v, d])
   Unify: (13) expressionnotatom2([v, d])
   Call: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) var(v)
   Fail: (15) var(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) isval(v)
   Unify: (15) isval(v)
   Call: (16) number(v)
   Fail: (16) number(v)
   Fail: (15) isval(v)
   Redo: (14) isvalstrempty(v)
   Unify: (14) isvalstrempty(v)
   Call: (15) string(v)
   Fail: (15) string(v)
   Fail: (14) isvalstrempty(v)
   Fail: (13) expressionnotatom2([v, d])
   Redo: (12) expressionnotatom([v, d])
   Unify: (12) expressionnotatom([v, d])
   Call: (13) predicate_or_rule_name([v, d])
   Fail: (13) predicate_or_rule_name([v, d])
   Fail: (12) expressionnotatom([v, d])
   Redo: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [], _G5867)
   Call: (12) lists:member([[v, d], _G5860], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Unify: (12) lists:member([[v, d], _G5860], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Exit: (12) lists:member([[v, d], ["b", "a"]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]])
   Call: (12) lists:append([], [[[v, d], ["b", "a"]]], _G5881)
   Unify: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Call: (12) updatevars([], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], _G5882)
   Unify: (12) updatevars([], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) updatevars([], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (11) updatevars([[[v, d], [v, d]]], [[[v, c], ["b", "a"]], [[v, b], ["c", "a"]], [[v, d], ["b", "a"]]], [], [[[v, d], ["b", "a"]]])
^  Call: (11) not([[[v, d], ["b", "a"]]]=[])
^  Unify: (11) not(user: ([[[v, d], ["b", "a"]]]=[]))
^  Exit: (11) not(user: ([[[v, d], ["b", "a"]]]=[]))
   Call: (11) unique1([[[v, d], ["b", "a"]]], [], _G18)
   Unify: (11) unique1([[[v, d], ["b", "a"]]], [], _G18)
   Call: (12) lists:delete([], [[v, d], ["b", "a"]], _G5887)
   Unify: (12) lists:delete([], [[v, d], ["b", "a"]], [])
   Exit: (12) lists:delete([], [[v, d], ["b", "a"]], [])
   Call: (12) lists:append([], [[[v, d], ["b", "a"]]], _G5890)
   Unify: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) lists:append([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Call: (12) unique1([], [[[v, d], ["b", "a"]]], _G18)
   Unify: (12) unique1([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (12) unique1([], [[[v, d], ["b", "a"]]], [[[v, d], ["b", "a"]]])
   Exit: (11) unique1([[[v, d], ["b", "a"]]], [], [[[v, d], ["b", "a"]]])
   Call: (11) findresult3([["b", "a"], ["c", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], _G5891)
   Unify: (11) findresult3([["b", "a"], ["c", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], _G5891)
   Call: (12) [["b", "a"], ["c", "a"], [v, d]]=[_G5881|_G5882]
   Exit: (12) [["b", "a"], ["c", "a"], [v, d]]=[["b", "a"], ["c", "a"], [v, d]]
   Call: (12) expressionnotatom(["b", "a"])
   Unify: (12) expressionnotatom(["b", "a"])
   Call: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) var(["b", "a"])
   Fail: (14) var(["b", "a"])
   Redo: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) isval(["b", "a"])
   Unify: (14) isval(["b", "a"])
   Call: (15) number(["b", "a"])
   Fail: (15) number(["b", "a"])
   Fail: (14) isval(["b", "a"])
   Redo: (13) isvalstrempty(["b", "a"])
   Unify: (13) isvalstrempty(["b", "a"])
   Call: (14) string(["b", "a"])
   Fail: (14) string(["b", "a"])
   Fail: (13) isvalstrempty(["b", "a"])
   Redo: (12) expressionnotatom(["b", "a"])
   Unify: (12) expressionnotatom(["b", "a"])
^  Call: (13) not(atom(["b", "a"]))
^  Unify: (13) not(user:atom(["b", "a"]))
^  Exit: (13) not(user:atom(["b", "a"]))
   Call: (13) length(["b", "a"], _G5897)
   Unify: (13) length(["b", "a"], _G5897)
   Exit: (13) length(["b", "a"], 2)
   Call: (13) 2>=1
   Exit: (13) 2>=1
   Call: (13) expressionnotatom2(["b", "a"])
   Unify: (13) expressionnotatom2(["b", "a"])
   Call: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) var("b")
   Fail: (15) var("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) isval("b")
   Unify: (15) isval("b")
   Call: (16) number("b")
   Fail: (16) number("b")
   Fail: (15) isval("b")
   Redo: (14) isvalstrempty("b")
   Unify: (14) isvalstrempty("b")
   Call: (15) string("b")
   Exit: (15) string("b")
   Exit: (14) isvalstrempty("b")
   Call: (14) expressionnotatom2(["a"])
   Unify: (14) expressionnotatom2(["a"])
   Call: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) var("a")
   Fail: (16) var("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) isval("a")
   Unify: (16) isval("a")
   Call: (17) number("a")
   Fail: (17) number("a")
   Fail: (16) isval("a")
   Redo: (15) isvalstrempty("a")
   Unify: (15) isvalstrempty("a")
   Call: (16) string("a")
   Exit: (16) string("a")
   Exit: (15) isvalstrempty("a")
   Call: (15) expressionnotatom2([])
   Unify: (15) expressionnotatom2([])
   Exit: (15) expressionnotatom2([])
   Exit: (14) expressionnotatom2(["a"])
   Exit: (13) expressionnotatom2(["b", "a"])
   Exit: (12) expressionnotatom(["b", "a"])
   Call: (12) lists:append([], [["b", "a"]], _G5901)
   Unify: (12) lists:append([], [["b", "a"]], [["b", "a"]])
   Exit: (12) lists:append([], [["b", "a"]], [["b", "a"]])
   Call: (12) findresult3([["c", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["b", "a"]], _G5902)
   Unify: (12) findresult3([["c", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["b", "a"]], _G5902)
   Call: (13) [["c", "a"], [v, d]]=[_G5892|_G5893]
   Exit: (13) [["c", "a"], [v, d]]=[["c", "a"], [v, d]]
   Call: (13) expressionnotatom(["c", "a"])
   Unify: (13) expressionnotatom(["c", "a"])
   Call: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) var(["c", "a"])
   Fail: (15) var(["c", "a"])
   Redo: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) isval(["c", "a"])
   Unify: (15) isval(["c", "a"])
   Call: (16) number(["c", "a"])
   Fail: (16) number(["c", "a"])
   Fail: (15) isval(["c", "a"])
   Redo: (14) isvalstrempty(["c", "a"])
   Unify: (14) isvalstrempty(["c", "a"])
   Call: (15) string(["c", "a"])
   Fail: (15) string(["c", "a"])
   Fail: (14) isvalstrempty(["c", "a"])
   Redo: (13) expressionnotatom(["c", "a"])
   Unify: (13) expressionnotatom(["c", "a"])
^  Call: (14) not(atom(["c", "a"]))
^  Unify: (14) not(user:atom(["c", "a"]))
^  Exit: (14) not(user:atom(["c", "a"]))
   Call: (14) length(["c", "a"], _G5908)
   Unify: (14) length(["c", "a"], _G5908)
   Exit: (14) length(["c", "a"], 2)
   Call: (14) 2>=1
   Exit: (14) 2>=1
   Call: (14) expressionnotatom2(["c", "a"])
   Unify: (14) expressionnotatom2(["c", "a"])
   Call: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) var("c")
   Fail: (16) var("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) isval("c")
   Unify: (16) isval("c")
   Call: (17) number("c")
   Fail: (17) number("c")
   Fail: (16) isval("c")
   Redo: (15) isvalstrempty("c")
   Unify: (15) isvalstrempty("c")
   Call: (16) string("c")
   Exit: (16) string("c")
   Exit: (15) isvalstrempty("c")
   Call: (15) expressionnotatom2(["a"])
   Unify: (15) expressionnotatom2(["a"])
   Call: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) var("a")
   Fail: (17) var("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) isval("a")
   Unify: (17) isval("a")
   Call: (18) number("a")
   Fail: (18) number("a")
   Fail: (17) isval("a")
   Redo: (16) isvalstrempty("a")
   Unify: (16) isvalstrempty("a")
   Call: (17) string("a")
   Exit: (17) string("a")
   Exit: (16) isvalstrempty("a")
   Call: (16) expressionnotatom2([])
   Unify: (16) expressionnotatom2([])
   Exit: (16) expressionnotatom2([])
   Exit: (15) expressionnotatom2(["a"])
   Exit: (14) expressionnotatom2(["c", "a"])
   Exit: (13) expressionnotatom(["c", "a"])
   Call: (13) lists:append([["b", "a"]], [["c", "a"]], _G5912)
   Unify: (13) lists:append([["b", "a"]], [["c", "a"]], [["b", "a"]|_G5904])
   Exit: (13) lists:append([["b", "a"]], [["c", "a"]], [["b", "a"], ["c", "a"]])
   Call: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["c", "a"]], _G5916)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["c", "a"]], _G5916)
   Call: (14) [[v, d]]=[_G5906|_G5907]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) var([v, d])
   Fail: (16) var([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) isval([v, d])
   Unify: (16) isval([v, d])
   Call: (17) number([v, d])
   Fail: (17) number([v, d])
   Fail: (16) isval([v, d])
   Redo: (15) isvalstrempty([v, d])
   Unify: (15) isvalstrempty([v, d])
   Call: (16) string([v, d])
   Fail: (16) string([v, d])
   Fail: (15) isvalstrempty([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
^  Call: (15) not(atom([v, d]))
^  Unify: (15) not(user:atom([v, d]))
^  Exit: (15) not(user:atom([v, d]))
   Call: (15) length([v, d], _G5922)
   Unify: (15) length([v, d], _G5922)
   Exit: (15) length([v, d], 2)
   Call: (15) 2>=1
   Exit: (15) 2>=1
   Call: (15) expressionnotatom2([v, d])
   Unify: (15) expressionnotatom2([v, d])
   Call: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) var(v)
   Fail: (17) var(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) isval(v)
   Unify: (17) isval(v)
   Call: (18) number(v)
   Fail: (18) number(v)
   Fail: (17) isval(v)
   Redo: (16) isvalstrempty(v)
   Unify: (16) isvalstrempty(v)
   Call: (17) string(v)
   Fail: (17) string(v)
   Fail: (16) isvalstrempty(v)
   Fail: (15) expressionnotatom2([v, d])
   Redo: (14) expressionnotatom([v, d])
   Unify: (14) expressionnotatom([v, d])
   Call: (15) predicate_or_rule_name([v, d])
   Fail: (15) predicate_or_rule_name([v, d])
   Fail: (14) expressionnotatom([v, d])
   Redo: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["c", "a"]], _G5916)
   Unify: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["c", "a"]], _G5916)
   Call: (14) [[v, d]]=[_G5906|_G5907]
   Exit: (14) [[v, d]]=[[v, d]]
   Call: (14) isvar([v, d])
   Unify: (14) isvar([v, d])
   Exit: (14) isvar([v, d])
   Call: (14) lists:member([[v, d], _G5912], [[[v, d], ["b", "a"]]])
   Unify: (14) lists:member([[v, d], _G5912], [[[v, d], ["b", "a"]]])
   Exit: (14) lists:member([[v, d], ["b", "a"]], [[[v, d], ["b", "a"]]])
   Call: (14) lists:append([["b", "a"], ["c", "a"]], [["b", "a"]], _G5927)
   Unify: (14) lists:append([["b", "a"], ["c", "a"]], [["b", "a"]], [["b", "a"]|_G5919])
   Exit: (14) lists:append([["b", "a"], ["c", "a"]], [["b", "a"]], [["b", "a"], ["c", "a"], ["b", "a"]])
   Call: (14) findresult3([], [[[v, d], ["b", "a"]]], [["b", "a"], ["c", "a"], ["b", "a"]], _G5934)
   Unify: (14) findresult3([], [[[v, d], ["b", "a"]]], [["b", "a"], ["c", "a"], ["b", "a"]], [["b", "a"], ["c", "a"], ["b", "a"]])
   Exit: (14) findresult3([], [[[v, d], ["b", "a"]]], [["b", "a"], ["c", "a"], ["b", "a"]], [["b", "a"], ["c", "a"], ["b", "a"]])
   Exit: (13) findresult3([[v, d]], [[[v, d], ["b", "a"]]], [["b", "a"], ["c", "a"]], [["b", "a"], ["c", "a"], ["b", "a"]])
   Exit: (12) findresult3([["c", "a"], [v, d]], [[[v, d], ["b", "a"]]], [["b", "a"]], [["b", "a"], ["c", "a"], ["b", "a"]])
   Exit: (11) findresult3([["b", "a"], ["c", "a"], [v, d]], [[[v, d], ["b", "a"]]], [], [["b", "a"], ["c", "a"], ["b", "a"]])
   Call: (11) debug(on)
   Fail: (11) debug(on)
   Redo: (10) member1([[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Call: (11) true
   Exit: (11) true
   Call: (11) true
   Exit: (11) true
   Exit: (10) member1([[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Exit: (9) interpret1(off, [[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])
   Exit: (8) interpret(off, [[n, f], [["b", "a"], ["c", "a"], [v, d]]], [[[n, f], [[v, c], [v, b], [v, d]], ":-", [[[n|...], [...|...]]]]], [[[v, d], ["b", "a"]]])