Section EXTEN.
Variable valu1: valuation.
Variable upto: valnum.
Variable valu2: valuation.
Hypothesis AGREE: valu_agree valu1 valu2 upto.
Variable ge: genv.
Variable sp: val.
Variable rs: regset.
Variable m: mem.

Lemma valnums_val_exten:
forall vl,
(forall v, In v vl -> Plt v upto) ->
map valu2 vl = map valu1 vl.