:: On the Instructions of { \bf SCM }
::  by Artur Korni{\l}owicz

environ

 vocabularies NUMBERS, AMI_3, AMI_1, FSM_1, ORDINAL1, CAT_1, XBOOLE_0, FUNCT_1,
      RELAT_1, FINSEQ_1, CARD_1, AMISTD_2, GRAPHSP, CARD_3, AMISTD_1, SUBSET_1,
      CIRCUIT2, FUNCT_4, FUNCOP_1, SETFAM_1, XXREAL_0, TARSKI, ARYTM_3,
      GOBOARD5, FRECHET, ARYTM_1, INT_1, PARTFUN1, NAT_1, COMPOS_1, GOBRD13,
      MEMSTR_0;
 notations TARSKI, XBOOLE_0, XTUPLE_0, SUBSET_1, SETFAM_1, RELAT_1, FUNCT_1,
      CARD_1, ORDINAL1, NUMBERS, XCMPLX_0, INT_1, FUNCOP_1, PARTFUN1, FINSEQ_1,
      FUNCT_4, XXREAL_0, VALUED_1, CARD_3, FUNCT_7, MEMSTR_0, COMPOS_0,
      COMPOS_1, EXTPRO_1, AMI_3, AMISTD_1, AMISTD_2;
 constructors NAT_D, AMI_3, AMISTD_2, RELSET_1, AMISTD_1, PRE_POLY, FUNCT_7,
      DOMAIN_1;
 registrations XBOOLE_0, RELAT_1, FUNCT_1, ORDINAL1, FUNCOP_1, XREAL_0, NAT_1,
      INT_1, FINSEQ_1, CARD_3, AMI_3, AMISTD_2, FUNCT_4, VALUED_0, EXTPRO_1,
      FUNCT_7, PRE_POLY, MEMSTR_0, CARD_1, COMPOS_0, XTUPLE_0;
 requirements NUMERALS, BOOLE, SUBSET, REAL, ARITHM;
 definitions TARSKI, AMISTD_1, AMISTD_2, XBOOLE_0, COMPOS_0;
 equalities AMISTD_1, AMI_3, FUNCOP_1, COMPOS_1, EXTPRO_1, MEMSTR_0, COMPOS_0,
      XTUPLE_0;
 expansions AMISTD_1, XBOOLE_0;
 theorems TARSKI, NAT_1, AMI_3, FUNCT_4, AMI_5, FUNCT_1, FUNCOP_1, SETFAM_1,
      AMISTD_1, FINSEQ_1, MEMSTR_0, FUNCT_7, CARD_3, XBOOLE_0, XBOOLE_1, NAT_D,
      ORDINAL1, PARTFUN1, PBOOLE, VALUED_1, EXTPRO_1, AMI_2, COMPOS_0,
      XTUPLE_0;

begin

reserve a, b, d1, d2 for Data-Location,
  il, i1, i2 for Nat,
  I for Instruction of SCM,
  s, s1, s2 for State of SCM,
  T for InsType of the InstructionsF of SCM,
  k,k1 for Nat;

theorem
 T = 0 or ... or T = 8
proof
  consider y being object such that
A1: [T,y] in proj1 the InstructionsF of SCM by XTUPLE_0:def 12;
  consider x being object such that
A2: [[T,y],x] in the InstructionsF of SCM by A1,XTUPLE_0:def 12;
   reconsider I = [T,y,x] as Instruction of SCM by A2;
  T = InsCode I;
 hence thesis by AMI_5:5;
end;

theorem Th2:
  JumpPart halt SCM = {};

theorem
  T = 0 implies JumpParts T = {0}
proof
  assume
A1: T = 0;
  hereby
    let a be object;
    assume a in JumpParts T;
    then consider I such that
A2: a = JumpPart I and
A3: InsCode I = T;
    I = halt SCM by A1,A3,AMI_5:7;
    hence a in {0} by A2,TARSKI:def 1;
  end;
  let a be object;
  assume a in {0};
  then
A4: a = 0 by TARSKI:def 1;
   InsCode halt SCM = 0;
  hence thesis by A1,Th2,A4;
end;

theorem
  T = 1 implies JumpParts T = {{}}
proof
  assume
A1: T = 1;
  hereby
    let x be object;
    assume x in JumpParts T;
     then consider I being Instruction of SCM such that
A2:   x = JumpPart I and
A3:   InsCode I = T;
     consider a,b such that
A4:   I = a:=b by A1,A3,AMI_5:8;
     x = {} by A2,A4;
    hence x in {{}} by TARSKI:def 1;
  end;
  set a = the Data-Location;
  let x be object;
  assume x in {{}};
   then x = {} by TARSKI:def 1;
   then
A5:  x = JumpPart(a:= a);
    InsCode(a:= a) = 1;
  hence thesis by A5,A1;
end;

theorem
  T = 2 implies JumpParts T = {{}}
proof
  assume
A1: T = 2;
  hereby
    let x be object;
    assume x in JumpParts T;
     then consider I being Instruction of SCM such that
A2:   x = JumpPart I and
A3:   InsCode I = T;
     consider a,b such that
A4:   I = AddTo(a,b) by A1,A3,AMI_5:9;
     x = {} by A2,A4;
    hence x in {{}} by TARSKI:def 1;
  end;
  set a = the Data-Location;
  let x be object;
  assume x in {{}};
   then x = {} by TARSKI:def 1;
   then
A5:  x = JumpPart AddTo(a,a);
    InsCode AddTo(a,a) = 2;
  hence thesis by A5,A1;
end;

theorem
  T = 3 implies JumpParts T = {{}}
proof
  assume
A1: T = 3;
  hereby
    let x be object;
    assume x in JumpParts T;
     then consider I being Instruction of SCM such that
A2:   x = JumpPart I and
A3:   InsCode I = T;
     consider a,b such that
A4:   I = SubFrom(a,b) by A1,A3,AMI_5:10;
     x = {} by A2,A4;
    hence x in {{}} by TARSKI:def 1;
  end;
  set a = the Data-Location;
  let x be object;
  assume x in {{}};
   then x = {} by TARSKI:def 1;
   then
A5:  x = JumpPart SubFrom(a,a);
    InsCode SubFrom(a,a) = 3;
  hence thesis by A5,A1;
end;

theorem
  T = 4 implies JumpParts T = {{}}
proof
  assume
A1: T = 4;
  hereby
    let x be object;
    assume x in JumpParts T;
     then consider I being Instruction of SCM such that
A2:   x = JumpPart I and
A3:   InsCode I = T;
     consider a,b such that
A4:   I = MultBy(a,b) by A1,A3,AMI_5:11;
     x = {} by A2,A4;
    hence x in {{}} by TARSKI:def 1;
  end;
  set a = the Data-Location;
  let x be object;
  assume x in {{}};
   then x = {} by TARSKI:def 1;
   then
A5:  x = JumpPart MultBy(a,a);
    InsCode MultBy(a,a) = 4;
  hence thesis by A5,A1;
end;

theorem
  T = 5 implies JumpParts T = {{}}
proof
  assume
A1: T = 5;
  hereby
    let x be object;
    assume x in JumpParts T;
     then consider I being Instruction of SCM such that
A2:   x = JumpPart I and
A3:   InsCode I = T;
     consider a,b such that
A4:   I = Divide(a,b) by A1,A3,AMI_5:12;
     x = {} by A2,A4;
    hence x in {{}} by TARSKI:def 1;
  end;
  set a = the Data-Location;
  let x be object;
  assume x in {{}};
   then x = {} by TARSKI:def 1;
   then
A5:  x = JumpPart Divide(a,a);
    InsCode Divide(a,a) = 5;
  hence thesis by A5,A1;
end;

theorem Th9:
  T = 6 implies dom product" JumpParts T = {1}
proof
  set i1 = the Element of NAT;
  assume
A1: T = 6;
  hereby
    let x be object;
    InsCode SCM-goto i1 = 6;
    then
A2: JumpPart SCM-goto i1 in JumpParts T by A1;
    assume x in dom product" JumpParts T;
    then x in DOM JumpParts T by CARD_3:def 12;
    then x in dom JumpPart SCM-goto i1 by A2,CARD_3:108;
    hence x in {1} by FINSEQ_1:2,def 8;
  end;
  let x be object;
  assume
A3: x in {1};
  for f being Function st f in JumpParts T holds x in dom f
  proof
    let f be Function;
    assume f in JumpParts T;
    then consider I being Instruction of SCM such that
A4: f = JumpPart I and
A5: InsCode I = T;
    consider i1 such that
A6: I = SCM-goto i1 by A1,A5,AMI_5:13;
    f = <*i1*> by A4,A6;
    hence thesis by A3,FINSEQ_1:2,def 8;
  end;
   then x in DOM JumpParts T by CARD_3:109;
  hence thesis by CARD_3:def 12;
end;

theorem Th10:
  T = 7 implies dom product" JumpParts T = {1}
proof
  set i1 = the Element of NAT,a = the Data-Location;
  assume
A1: T = 7;
  hereby
    let x be object;
    InsCode (a =0_goto i1) = 7;
    then
A2: JumpPart (a =0_goto i1) in JumpParts T by A1;
    assume x in dom product" JumpParts T;
    then x in DOM JumpParts T by CARD_3:def 12;
    then x in dom JumpPart (a =0_goto i1) by A2,CARD_3:108;
    hence x in {1} by FINSEQ_1:2,38;
  end;
  let x be object;
  assume
A3: x in {1};
  for f being Function st f in JumpParts T holds x in dom f
  proof
    let f be Function;
    assume f in JumpParts T;
    then consider I being Instruction of SCM such that
A4: f = JumpPart I and
A5: InsCode I = T;
    consider i1, a such that
A6: I = a =0_goto i1 by A1,A5,AMI_5:14;
    f = <*i1*> by A4,A6;
    hence thesis by A3,FINSEQ_1:2,38;
  end;
   then x in DOM JumpParts T by CARD_3:109;
  hence thesis by CARD_3:def 12;
end;

theorem Th11:
  T = 8 implies dom product" JumpParts T = {1}
proof
  set i1 = the Element of NAT,a = the Data-Location;
  assume
A1: T = 8;
  hereby
    let x be object;
    InsCode (a >0_goto i1) = 8;
    then
A2: JumpPart (a >0_goto i1) in JumpParts T by A1;
    assume x in dom product" JumpParts T;
    then x in DOM JumpParts T by CARD_3:def 12;
    then x in dom JumpPart (a >0_goto i1) by A2,CARD_3:108;
    hence x in {1} by FINSEQ_1:2,38;
  end;
  let x be object;
  assume
A3: x in {1};
  for f being Function st f in JumpParts T holds x in dom f
  proof
    let f be Function;
    assume f in JumpParts T;
    then consider I being Instruction of SCM such that
A4: f = JumpPart I and
A5: InsCode I = T;
    consider i1, a such that
A6: I = a >0_goto i1 by A1,A5,AMI_5:15;
    f = <*i1*> by A4,A6;
    hence thesis by A3,FINSEQ_1:2,38;
  end;
   then x in DOM JumpParts T by CARD_3:109;
  hence thesis by CARD_3:def 12;
end;

theorem
  (product" JumpParts InsCode SCM-goto k1).1 = NAT
proof
 dom product" JumpParts InsCode SCM-goto k1 = {1}
   by Th9;
  then
A1: 1 in dom product" JumpParts InsCode SCM-goto k1 by TARSKI:def 1;
  hereby
    let x be object;
    assume x in (product" JumpParts InsCode SCM-goto k1).1;
    then x in pi(JumpParts InsCode SCM-goto k1,1) by A1,CARD_3:def 12;
    then consider g being Function such that
A2: g in JumpParts InsCode SCM-goto k1 and
A3: x = g.1 by CARD_3:def 6;
    consider I being Instruction of SCM such that
A4: g = JumpPart I and
A5: InsCode I = InsCode SCM-goto k1 by A2;
    InsCode I = 6 by A5;
    then consider i2 such that
A6: I = SCM-goto i2 by AMI_5:13;
    g = <*i2*> by A4,A6;
    then x = i2 by A3,FINSEQ_1:def 8;
    hence x in NAT by ORDINAL1:def 12;
  end;
  let x be object;
  assume x in NAT;
  then reconsider x as Element of NAT;
  JumpPart SCM-goto x = <*x*> & InsCode SCM-goto k1
   = InsCode SCM-goto x;
  then
A7: <*x*> in JumpParts InsCode SCM-goto k1;
  <*x*>.1 = x by FINSEQ_1:def 8;
  then x in pi(JumpParts InsCode SCM-goto k1,1) by A7,CARD_3:def 6;
  hence thesis by A1,CARD_3:def 12;
end;

theorem
  (product" JumpParts InsCode (a =0_goto k1)).1 = NAT
proof
 dom product" JumpParts InsCode (a =0_goto k1) = {1} by Th10;
  then
A1: 1 in dom product" JumpParts InsCode (a =0_goto k1) by TARSKI:def 1;
  hereby
    let x be object;
    assume x in (product" JumpParts InsCode (a =0_goto k1)).1;
    then x in pi(JumpParts InsCode (a =0_goto k1),1) by A1,CARD_3:def 12;
    then consider g being Function such that
A2: g in JumpParts InsCode (a =0_goto k1) and
A3: x = g.1 by CARD_3:def 6;
    consider I being Instruction of SCM such that
A4: g = JumpPart I and
A5: InsCode I = InsCode (a =0_goto k1) by A2;
    InsCode I = 7 by A5;
    then consider i2, b such that
A6: I = b =0_goto i2 by AMI_5:14;
    g = <*i2*> by A4,A6;
    then x = i2 by A3,FINSEQ_1:40;
    hence x in NAT by ORDINAL1:def 12;
  end;
  let x be object;
  assume x in NAT;
  then reconsider x as Element of NAT;
  JumpPart (a =0_goto x) = <*x*> & InsCode (a =0_goto k1) = InsCode
  (a =0_goto x);
  then
A7: <*x*> in JumpParts InsCode (a =0_goto k1);
  <*x*>.1 = x by FINSEQ_1:40;
  then x in pi(JumpParts InsCode (a =0_goto k1),1) by A7,CARD_3:def 6;
  hence thesis by A1,CARD_3:def 12;
end;

theorem
  (product" JumpParts InsCode (a >0_goto k1)).1 = NAT
proof
 dom product" JumpParts InsCode (a >0_goto k1) = {1} by Th11;
  then
A1: 1 in dom product" JumpParts InsCode (a >0_goto k1) by TARSKI:def 1;
  hereby
    let x be object;
    assume x in (product" JumpParts InsCode (a >0_goto k1)).1;
    then x in pi(JumpParts InsCode (a >0_goto k1),1) by A1,CARD_3:def 12;
    then consider g being Function such that
A2: g in JumpParts InsCode (a >0_goto k1) and
A3: x = g.1 by CARD_3:def 6;
    consider I being Instruction of SCM such that
A4: g = JumpPart I and
A5: InsCode I = InsCode (a >0_goto k1) by A2;
    InsCode I = 8 by A5;
    then consider i2, b such that
A6: I = b >0_goto i2 by AMI_5:15;
    g = <*i2*> by A4,A6;
    then x = i2 by A3,FINSEQ_1:40;
    hence x in NAT by ORDINAL1:def 12;
  end;
  let x be object;
  assume x in NAT;
  then reconsider x as Element of NAT;
  JumpPart (a >0_goto x) = <*x*> & InsCode (a >0_goto k1) = InsCode
  (a >0_goto x);
  then
A7: <*x*> in JumpParts InsCode (a >0_goto k1);
  <*x*>.1 = x by FINSEQ_1:40;
  then x in pi(JumpParts InsCode (a >0_goto k1),1) by A7,CARD_3:def 6;
  hence thesis by A1,CARD_3:def 12;
end;

Lm1: for i being Instruction of SCM holds (for l being Element of NAT
holds NIC(i,l)={l+1}) implies JUMP i is empty

proof
  set p=1, q=2;
  let i be Instruction of SCM;
  assume
A1: for l being Element of NAT holds NIC(i,l)={l+1};
  set X = the set of all  NIC(i,f) where f is Nat;
  reconsider p, q as Element of NAT;
  assume not thesis;
  then consider x being object such that
A2: x in meet X;
  NIC(i,p) = {p+1} by A1;
  then {succ p} in X;
  then x in {succ p} by A2,SETFAM_1:def 1;
  then
A3: x = succ p by TARSKI:def 1;
  NIC(i,q) = {q+1} by A1;
  then {succ q} in X;
  then x in {succ q} by A2,SETFAM_1:def 1;
  hence contradiction by A3,TARSKI:def 1;
end;

registration
  cluster JUMP halt SCM -> empty;
  coherence;
end;

registration
  let a, b;
  cluster a:=b -> sequential;
  coherence
  by AMI_3:2;
  cluster AddTo(a,b) -> sequential;
  coherence
  by AMI_3:3;
  cluster SubFrom(a,b) -> sequential;
  coherence
  by AMI_3:4;
  cluster MultBy(a,b) -> sequential;
  coherence
  by AMI_3:5;
  cluster Divide(a,b) -> sequential;
  coherence
  by AMI_3:6;
end;

registration
  let a, b;
  cluster JUMP (a := b) -> empty;
  coherence
  proof
    for l being Element of NAT holds NIC(a:=b,l)={l+1} by AMISTD_1:12;
    hence thesis by Lm1;
  end;
end;

registration
  let a, b;
  cluster JUMP AddTo(a, b) -> empty;
  coherence
  proof
    for l being Element of NAT holds NIC(AddTo(a,b),l)={l+1} by AMISTD_1:12;
    hence thesis by Lm1;
  end;
end;

registration
  let a, b;
  cluster JUMP SubFrom(a, b) -> empty;
  coherence
  proof
    for l being Element of NAT holds NIC(SubFrom(a,b),l)={l+1} by AMISTD_1:12;
    hence thesis by Lm1;
  end;
end;

registration
  let a, b;
  cluster JUMP MultBy(a,b) -> empty;
  coherence
  proof
    for l being Element of NAT holds NIC(MultBy(a,b),l)={l+1} by AMISTD_1:12;
    hence thesis by Lm1;
  end;
end;

registration
  let a, b;
  cluster JUMP Divide(a,b) -> empty;
  coherence
  proof
    for l being Element of NAT holds NIC(Divide(a,b),l)={l+1} by AMISTD_1:12;
    hence thesis by Lm1;
  end;
end;

theorem Th15:
  NIC(SCM-goto k, il) = {k}
proof
  now
    let x be object;
A1: now
      il in NAT by ORDINAL1:def 12;
      then reconsider il1 = il as Element of Values IC SCM by MEMSTR_0:def 6;
      set I = SCM-goto k;
      set t = the State of SCM,
      Q = the Instruction-Sequence of SCM;
      assume
A2:   x = k;
      reconsider n = il as Element of NAT by ORDINAL1:def 12;
      reconsider u = t+*(IC SCM,il1)
       as Element of product the_Values_of SCM by CARD_3:107;
      reconsider P = Q +* (il,I)
       as Instruction-Sequence of SCM;
     reconsider ill=il as Element of NAT by ORDINAL1:def 12;
A3:   P/.ill = P.ill by PBOOLE:143;
    IC SCM in dom t by MEMSTR_0:2;
    then
A4: IC u = n by FUNCT_7:31;
    il in NAT by ORDINAL1:def 12;
    then il in dom Q by PARTFUN1:def 2;
    then
A5: P.n = I by FUNCT_7:31;
    then IC Following(P,u) = k by A3,A4,AMI_3:7;
      hence x in {IC Exec(SCM-goto k,s)
       where s is Element of product the_Values_of SCM
       : IC s = il} by A2,A4,A3,A5;
    end;
    now
      assume x in {IC Exec(SCM-goto k,s)
       where s is Element of product the_Values_of SCM
       : IC s = il};
      then ex s being Element of product the_Values_of SCM
      st x = IC Exec(SCM-goto k,s) & IC s = il;
      hence x = k by AMI_3:7;
    end;
    hence
    x in {k} iff x in {IC Exec(SCM-goto k,s)
       where s is Element of product the_Values_of SCM
     : IC s = il} by A1,TARSKI:def 1;
  end;
  hence thesis by TARSKI:2;
end;

theorem Th16:
  JUMP SCM-goto k = {k}
proof
  set X = the set of all  NIC(SCM-goto k, il) ;
  now
    let x be object;
    hereby
      set il1 = 1;
A1:   NIC(SCM-goto k, il1) in X;
      assume x in meet X;
      then x in NIC(SCM-goto k, il1) by A1,SETFAM_1:def 1;
      hence x in {k} by Th15;
    end;
    assume x in {k};
    then
A2: x = k by TARSKI:def 1;
A3: now
      let Y be set;
      assume Y in X;
      then consider il being Nat such that
A4:   Y = NIC(SCM-goto k, il);
      NIC(SCM-goto k, il) = {k} by Th15;
      hence k in Y by A4,TARSKI:def 1;
    end;
    reconsider k as Element of NAT by ORDINAL1:def 12;
    NIC(SCM-goto k, k) in X;
    hence x in meet X by A2,A3,SETFAM_1:def 1;
  end;
  hence thesis by TARSKI:2;
end;

registration
  let i1;
  cluster JUMP SCM-goto i1 -> 1-element;
  coherence
  proof
    JUMP SCM-goto i1 = {i1} by Th16;
    hence thesis;
  end;
end;

theorem Th17:
  NIC(a=0_goto k, il) = {k, il+1}
proof
  set t = the State of SCM,
      Q = the Instruction-Sequence of SCM;
  hereby
    let x be object;
    assume x in NIC(a=0_goto k, il);
    then consider s being Element of product the_Values_of SCM
    such that
A1: x = IC Exec(a=0_goto k,s) & IC s = il;
    per cases;
    suppose
      s.a = 0;
      then x = k by A1,AMI_3:8;
      hence x in {k, il+1} by TARSKI:def 2;
    end;
    suppose
      s.a <> 0;
      then x = il + 1 by A1,AMI_3:8;
      hence x in {k, il+1} by TARSKI:def 2;
    end;
  end;
  let x be object;
  set I = a=0_goto k;
A2: IC SCM <> a by AMI_5:2;
  reconsider n = il as Element of NAT by ORDINAL1:def 12;
  reconsider il1 = n as Element of Values IC SCM by MEMSTR_0:def 6;
      reconsider u = t+*(IC SCM,il1)
       as Element of product the_Values_of SCM by CARD_3:107;
      reconsider P = Q +* (il,I)
       as Instruction-Sequence of SCM;
  assume
A3: x in {k,il+1};
  per cases by A3,TARSKI:def 2;
  suppose
A4: x = k;
    reconsider v = u+*(a .--> 0)
     as Element of product the_Values_of SCM by CARD_3:107;
A5: IC SCM in dom t by MEMSTR_0:2;
    not IC SCM in dom (a .--> 0) by A2,TARSKI:def 1;
    then
A7: IC v = IC u by FUNCT_4:11
      .= n by A5,FUNCT_7:31;
     reconsider il as Element of NAT by ORDINAL1:def 12;
A8:   P/.il = P.il by PBOOLE:143;
    il in NAT;
    then il in dom Q by PARTFUN1:def 2;
    then
A9: P.il = I by FUNCT_7:31;
    a in dom (a .--> 0) by TARSKI:def 1;
    then
   v.a = (a .--> 0).a by FUNCT_4:13
      .= 0 by FUNCOP_1:72;
    then IC Following(P,v) = k by A7,A9,A8,AMI_3:8;
    hence thesis by A4,A7,A9,A8;
  end;
  suppose
A10: x = il+1;
    reconsider v = u+*(a .--> 1)
     as Element of product the_Values_of SCM by CARD_3:107;
A11: IC SCM in dom t by MEMSTR_0:2;
    not IC SCM in dom (a .--> 1) by A2,TARSKI:def 1;
    then
A13: IC v = IC u by FUNCT_4:11
      .= n by A11,FUNCT_7:31;
     reconsider il as Element of NAT by ORDINAL1:def 12;
A14:   P/.il = P.il by PBOOLE:143;
    il in NAT;
    then il in dom Q by PARTFUN1:def 2;
    then
A15: P.il = I by FUNCT_7:31;
    a in dom (a .--> 1) by TARSKI:def 1;
    then v.a = (a .--> 1).a by FUNCT_4:13
      .= 1 by FUNCOP_1:72;
    then IC Following(P,v) = il+1 by A13,A15,A14,AMI_3:8;
    hence thesis by A10,A13,A15,A14;
  end;
end;

theorem Th18:
  JUMP (a=0_goto k) = {k}
proof
  set X = the set of all  NIC(a=0_goto k, il) ;
  now
    let x be object;
A1: now
      let Y be set;
      assume Y in X;
      then consider il being Nat such that
A2:   Y = NIC(a=0_goto k, il);
      NIC(a=0_goto k, il) = {k, il+1} by Th17;
      hence k in Y by A2,TARSKI:def 2;
    end;
    hereby
      set il1 = 1, il2 = 2;
      assume
A3:   x in meet X;
A4:   NIC(a=0_goto k, il2) = {k, il2+1} by Th17;
      NIC(a=0_goto k, il2) in X;
      then x in NIC(a=0_goto k, il2) by A3,SETFAM_1:def 1;
      then
A5:   x = k or x = il2+1 by A4,TARSKI:def 2;
A6:   NIC(a=0_goto k, il1) = {k, il1+1} by Th17;
      NIC(a=0_goto k, il1) in X;
      then x in NIC(a=0_goto k, il1) by A3,SETFAM_1:def 1;
      then x = k or x = il1+1 by A6,TARSKI:def 2;
      hence x in {k} by A5,TARSKI:def 1;
    end;
    assume x in {k};
    then
A7: x = k by TARSKI:def 1;
    reconsider k as Element of NAT by ORDINAL1:def 12;
    NIC(a=0_goto k, k) in X;
    hence x in meet X by A7,A1,SETFAM_1:def 1;
  end;
  hence thesis by TARSKI:2;
end;

registration
  let a, i1;
  cluster JUMP (a =0_goto i1) -> 1-element;
  coherence
  proof
    JUMP (a =0_goto i1) = {i1} by Th18;
    hence thesis;
  end;
end;

theorem Th19:
  NIC(a>0_goto k, il) = {k, il+1}
proof
  set t = the State of SCM,
      Q = the Instruction-Sequence of SCM;
  hereby
    let x be object;
    assume x in NIC(a>0_goto k, il);
    then consider s being Element of product the_Values_of SCM
    such that
A1: x = IC Exec(a>0_goto k,s) & IC s = il;
    per cases;
    suppose
      s.a > 0;
      then x = k by A1,AMI_3:9;
      hence x in {k, il+1} by TARSKI:def 2;
    end;
    suppose
      s.a <= 0;
      then x = il+1 by A1,AMI_3:9;
      hence x in {k, il+1} by TARSKI:def 2;
    end;
  end;
  let x be object;
  set I = a>0_goto k;
A2: IC SCM <> a by AMI_5:2;
  assume
A3: x in {k,il+1};
   reconsider n = il as Element of NAT by ORDINAL1:def 12;
  reconsider il1 = n as Element of Values IC SCM by MEMSTR_0:def 6;
      reconsider u = t+*(IC SCM,il1)
       as Element of product the_Values_of SCM by CARD_3:107;
      reconsider P = Q +* (il,I)
       as Instruction-Sequence of SCM;
  per cases by A3,TARSKI:def 2;
  suppose
A4: x = k;
    reconsider v = u+*(a .--> 1)
     as Element of product the_Values_of SCM by CARD_3:107;
A5: IC SCM in dom t by MEMSTR_0:2;
    not IC SCM in dom (a .--> 1) by A2,TARSKI:def 1;
    then
A7: IC v = IC u by FUNCT_4:11
      .= n by A5,FUNCT_7:31;
     reconsider il as Element of NAT by ORDINAL1:def 12;
A8:   P/.il = P.il by PBOOLE:143;
    il in NAT;
    then il in dom Q by PARTFUN1:def 2;
    then
A9: P.il = I by FUNCT_7:31;
    a in dom (a .--> 1) by TARSKI:def 1;
    then v.a = (a .--> 1).a by FUNCT_4:13
      .= 1 by FUNCOP_1:72;
    then IC Following(P,v) = k by A7,A9,A8,AMI_3:9;
    hence thesis by A4,A7,A9,A8;
  end;
  suppose
A10: x = il+1;
    reconsider v = u+*(a .--> 0)
     as Element of product the_Values_of SCM by CARD_3:107;
A11: IC SCM in dom t by MEMSTR_0:2;
    not IC SCM in dom (a .--> 0) by A2,TARSKI:def 1;
    then
A13: IC v = IC u by FUNCT_4:11
      .= n by A11,FUNCT_7:31;
     reconsider il as Element of NAT by ORDINAL1:def 12;
A14:   P/.il = P.il by PBOOLE:143;
    il in NAT;
    then il in dom Q by PARTFUN1:def 2;
    then
A15: P.il = I by FUNCT_7:31;
    a in dom (a .--> 0) by TARSKI:def 1;
    then v.a = (a .--> 0).a by FUNCT_4:13
      .= 0 by FUNCOP_1:72;
    then IC Following(P,v) = il+1 by A13,A15,A14,AMI_3:9;
    hence thesis by A10,A13,A15,A14;
  end;
end;

theorem Th20:
  JUMP (a>0_goto k) = {k}
proof
  set X = the set of all  NIC(a>0_goto k, il) ;
  now
    let x be object;
A1: now
      let Y be set;
      assume Y in X;
      then consider il being Nat such that
A2:   Y = NIC(a>0_goto k, il);
      NIC(a>0_goto k, il) = {k, il+1} by Th19;
      hence k in Y by A2,TARSKI:def 2;
    end;
    hereby
      set il1 = 1, il2 = 2;
      assume
A3:   x in meet X;
A4:   NIC(a>0_goto k, il2) = {k, il2+1} by Th19;
      NIC(a>0_goto k, il2) in X;
      then x in NIC(a>0_goto k, il2) by A3,SETFAM_1:def 1;
      then
A5:   x = k or x = il2+1 by A4,TARSKI:def 2;
A6:   NIC(a>0_goto k, il1) = {k, il1+1} by Th19;
      NIC(a>0_goto k, il1) in X;
      then x in NIC(a>0_goto k, il1) by A3,SETFAM_1:def 1;
      then x = k or x = il1+1 by A6,TARSKI:def 2;
      hence x in {k} by A5,TARSKI:def 1;
    end;
    assume x in {k};
    then
A7: x = k by TARSKI:def 1;
    reconsider k as Element of NAT by ORDINAL1:def 12;
    NIC(a>0_goto k, k) in X;
    hence x in meet X by A7,A1,SETFAM_1:def 1;
  end;
  hence thesis by TARSKI:2;
end;

registration
  let a, i1;
  cluster JUMP (a >0_goto i1) -> 1-element;
  coherence
  proof
    JUMP (a >0_goto i1) = {i1} by Th20;
    hence thesis;
  end;
end;

theorem Th21:
  SUCC(il,SCM) = {il, il+1}
proof
  set X = the set of all
 NIC(I, il) \ JUMP I where I is Element of the InstructionsF of SCM;
  set N = {il, il+1};
  now
    let x be object;
    hereby
      assume x in union X;
      then consider Y being set such that
A1:   x in Y and
A2:   Y in X by TARSKI:def 4;
      consider i being Element of the InstructionsF of SCM such that
A3:   Y = NIC(i, il) \ JUMP i by A2;
      per cases by AMI_3:24;
      suppose
        i = [0,{},{}];
        then x in {il} \ JUMP halt SCM by A1,A3,AMISTD_1:2;
        then x = il by TARSKI:def 1;
        hence x in N by TARSKI:def 2;
      end;
      suppose
        ex a,b st i = a:=b;
        then consider a, b such that
A4:     i = a:=b;
        x in {il+1} \ JUMP (a:=b) by A1,A3,A4,AMISTD_1:12;
        then x = il+1 by TARSKI:def 1;
        hence x in N by TARSKI:def 2;
      end;
      suppose
        ex a,b st i = AddTo(a,b);
        then consider a, b such that
A5:     i = AddTo(a,b);
        x in {il+1} \ JUMP AddTo(a,b) by A1,A3,A5,AMISTD_1:12;
        then x = il+1 by TARSKI:def 1;
        hence x in N by TARSKI:def 2;
      end;
      suppose
        ex a,b st i = SubFrom(a,b);
        then consider a, b such that
A6:     i = SubFrom(a,b);
        x in {il+1} \ JUMP SubFrom(a,b) by A1,A3,A6,AMISTD_1:12;
        then x = il+1 by TARSKI:def 1;
        hence x in N by TARSKI:def 2;
      end;
      suppose
        ex a,b st i = MultBy(a,b);
        then consider a, b such that
A7:     i = MultBy(a,b);
        x in {il+1} \ JUMP MultBy(a,b) by A1,A3,A7,AMISTD_1:12;
        then x = il+1 by TARSKI:def 1;
        hence x in N by TARSKI:def 2;
      end;
      suppose
        ex a,b st i = Divide(a,b);
        then consider a, b such that
A8:     i = Divide(a,b);
        x in {il+1} \ JUMP Divide(a,b) by A1,A3,A8,AMISTD_1:12;
        then x = il+1 by TARSKI:def 1;
        hence x in N by TARSKI:def 2;
      end;
      suppose
        ex k st i = SCM-goto k;
        then consider k such that
A9:     i = SCM-goto k;
        x in {k} \ JUMP i by A1,A3,A9,Th15;
        then x in {k} \ {k} by A9,Th16;
        hence x in N by XBOOLE_1:37;
      end;
      suppose
        ex a,k st i = a=0_goto k;
        then consider a, k such that
A10:    i = a=0_goto k;
A11:    NIC(i, il) = {k, il+1} by A10,Th17;
        x in NIC(i, il) by A1,A3,XBOOLE_0:def 5;
        then
A12:    x = k or x = il+1 by A11,TARSKI:def 2;
        x in NIC(i, il) \ {k} by A1,A3,A10,Th18;
        then not x in {k} by XBOOLE_0:def 5;
        hence x in N by A12,TARSKI:def 1,def 2;
      end;
      suppose
        ex a,k st i = a>0_goto k;
        then consider a, k such that
A13:    i = a>0_goto k;
A14:    NIC(i, il) = {k, il+1} by A13,Th19;
        x in NIC(i, il) by A1,A3,XBOOLE_0:def 5;
        then
A15:    x = k or x = il+1 by A14,TARSKI:def 2;
        x in NIC(i, il) \ {k} by A1,A3,A13,Th20;
        then not x in {k} by XBOOLE_0:def 5;
        hence x in N by A15,TARSKI:def 1,def 2;
      end;
    end;
    assume
A16: x in {il, il+1};
    per cases by A16,TARSKI:def 2;
    suppose
A17:  x = il;
      set i = halt SCM;
      NIC(i, il) \ JUMP i = {il} by AMISTD_1:2;
      then
A18:  {il} in X;
      x in {il} by A17,TARSKI:def 1;
      hence x in union X by A18,TARSKI:def 4;
    end;
    suppose
A19:  x = il+1;
      set a = the Data-Location;
      set i = AddTo(a,a);
      NIC(i, il) \ JUMP i = {il+1} by AMISTD_1:12;
      then
A20:  {il+1} in X;
      x in {il+1} by A19,TARSKI:def 1;
      hence x in union X by A20,TARSKI:def 4;
    end;
  end;
  hence thesis by TARSKI:2;
end;

theorem Th22:
for k being Nat holds k+1 in SUCC(k,SCM) &
 for j being Nat st j in SUCC(k,SCM) holds k <= j
proof
  let k be Nat;
  reconsider fk = k as Element of NAT by ORDINAL1:def 12;
A1: SUCC(k,SCM) = {k, fk+1} by Th21;
  hence k+1 in SUCC(k,SCM) by TARSKI:def 2;
  let j be Nat;
  assume
A2: j in SUCC(k,SCM);
  reconsider fk = k as Element of NAT by ORDINAL1:def 12;
  per cases by A1,A2,TARSKI:def 2;
  suppose
    j = k;
    hence thesis;
  end;
  suppose
    j = fk + 1;
    hence thesis by NAT_1:11;
  end;
end;

registration
  cluster SCM -> standard;
  coherence by Th22,AMISTD_1:3;
end;

registration
  cluster InsCode halt SCM -> jump-only
   for InsType of the InstructionsF of SCM;
  coherence
  proof
    now
      let s be State of SCM, o be Object of SCM, I be Instruction of SCM;
      assume that
A1:   InsCode I = InsCode halt SCM and
      o in Data-Locations SCM;
      I = halt SCM by A1,AMI_5:7;
      hence Exec(I, s).o = s.o by EXTPRO_1:def 3;
    end;
    hence thesis;
  end;
end;

registration
  cluster halt SCM -> jump-only;
  coherence;
end;

registration
  let i1;
  cluster InsCode SCM-goto i1 -> jump-only
  for InsType of the InstructionsF of SCM;
  coherence
  proof
   let T be InsType of the InstructionsF of SCM such that
A1:  T = InsCode SCM-goto i1;
      let s be State of SCM, o be Object of SCM, I be Instruction of SCM;
      assume that
A2:   InsCode I = T and
A3:   o in Data-Locations SCM;
      InsCode I = 6 by A2,A1;
      then
A4:   ex i2 st I = SCM-goto i2 by AMI_5:13;
        o is Data-Location by A3,AMI_2:def 16,AMI_3:27;
        hence Exec(I, s).o = s.o by A4,AMI_3:7;
  end;
end;

registration
  let i1;
  cluster SCM-goto i1 -> jump-only non sequential non ins-loc-free;
  coherence
  proof
    thus InsCode SCM-goto i1 is jump-only;
    JUMP SCM-goto i1 <> {};
    hence SCM-goto i1 is non sequential by AMISTD_1:13;
   thus JumpPart SCM-goto i1 is not empty;
  end;
end;

registration
  let a, i1;
  cluster InsCode (a =0_goto i1) -> jump-only
  for InsType of the InstructionsF of SCM;
  coherence
  proof
    set S = SCM;
    now
      let s be State of S, o be Object of S, I be Instruction of S;
      assume that
A1:   InsCode I = InsCode (a =0_goto i1) and
A2:   o in Data-Locations SCM;
      InsCode I = 7 by A1;
      then
A3:   ex i2, b st I = (b =0_goto i2) by AMI_5:14;
        o is Data-Location by A2,AMI_2:def 16,AMI_3:27;
        hence Exec(I, s).o = s.o by A3,AMI_3:8;
    end;
    hence thesis;
  end;
  cluster InsCode (a >0_goto i1) -> jump-only
  for InsType of the InstructionsF of SCM;
  coherence
  proof
    set S = SCM;
    now
      let s be State of S, o be Object of S, I be Instruction of S;
      assume that
A4:   InsCode I = InsCode (a >0_goto i1) and
A5:   o in Data-Locations SCM;
      InsCode I = 8 by A4;
      then
A6:   ex i2, b st I = (b >0_goto i2) by AMI_5:15;
        o is Data-Location by A5,AMI_2:def 16,AMI_3:27;
        hence Exec(I, s).o = s.o by A6,AMI_3:9;
    end;
    hence thesis;
  end;
end;

registration
  let a, i1;
  cluster a =0_goto i1 -> jump-only non sequential non ins-loc-free;
  coherence
  proof
    thus InsCode (a =0_goto i1) is jump-only;
    JUMP (a =0_goto i1) <> {};
    hence a =0_goto i1 is non sequential by AMISTD_1:13;
    thus JumpPart(a =0_goto i1) is not empty;
  end;
  cluster a >0_goto i1 -> jump-only non sequential non ins-loc-free;
  coherence
  proof
    thus InsCode (a >0_goto i1) is jump-only;
    JUMP (a >0_goto i1) <> {};
    hence a >0_goto i1 is non sequential by AMISTD_1:13;
   thus JumpPart(a >0_goto i1) is not empty;
  end;
end;

Lm2: dl.0 <> dl.1 by AMI_3:10;

registration
  let a, b;
  cluster InsCode (a:=b) -> non jump-only
  for InsType of the InstructionsF of SCM;
  coherence
  proof
    set w = the State of SCM;
    set t = w+*((dl.0, dl.1)-->(0,1));
A1: InsCode (a:=b) = 1
      .= InsCode (dl.0:=dl.1);
A2: dl.0 in Data-Locations SCM by AMI_3:28;
A3: dom ((dl.0, dl.1)-->(0,1)) = {dl.0, dl.1} by FUNCT_4:62;
    then
A4: dl.1 in dom ((dl.0, dl.1)-->(0,1)) by TARSKI:def 2;
    dl.0 in dom ((dl.0, dl.1)-->(0,1)) by A3,TARSKI:def 2;
    then
A5: t.dl.0 = (dl.0, dl.1)-->(0,1).dl.0 by FUNCT_4:13
      .= 0 by AMI_3:10,FUNCT_4:63;
    Exec((dl.0:=dl.1), t).dl.0 = t.dl.1 by AMI_3:2
      .= (dl.0, dl.1)-->(0,1).dl.1 by A4,FUNCT_4:13
      .= 1 by FUNCT_4:63;
    hence thesis by A1,A2,A5;
  end;
  cluster InsCode AddTo(a,b) -> non jump-only
  for InsType of the InstructionsF of SCM;
  coherence
  proof
    set w = the State of SCM;
    set t = w+*((dl.0, dl.1)-->(0,1));
A6: InsCode AddTo(a,b) = 2
      .= InsCode AddTo(dl.0, dl.1);
A7: dom ((dl.0, dl.1)-->(0,1)) = {dl.0, dl.1} by FUNCT_4:62;
    then dl.0 in dom ((dl.0, dl.1)-->(0,1)) by TARSKI:def 2;
    then
A8: t.dl.0 = (dl.0, dl.1)-->(0,1).dl.0 by FUNCT_4:13
      .= 0 by AMI_3:10,FUNCT_4:63;
A9: dl.0 in Data-Locations SCM by AMI_3:28;
    dl.1 in dom ((dl.0, dl.1)-->(0,1)) by A7,TARSKI:def 2;
    then t.dl.1 = (dl.0, dl.1)-->(0,1).dl.1 by FUNCT_4:13
      .= 1 by FUNCT_4:63;
    then dl.0 <> IC SCM &
    Exec(AddTo(dl.0, dl.1), t).dl.0 = (0 qua Nat)+1 by A8,AMI_3:3,13;
    hence thesis by A6,A8,A9;
  end;
  cluster InsCode SubFrom(a,b) -> non jump-only
  for InsType of the InstructionsF of SCM;
  coherence
  proof
    set w = the State of SCM;
    set t = w+*((dl.0, dl.1)-->(0,1));
A10: InsCode SubFrom(a,b) = 3
      .= InsCode SubFrom(dl.0, dl.1);
A11: dom ((dl.0, dl.1)-->(0,1)) = {dl.0, dl.1} by FUNCT_4:62;
    then dl.0 in dom ((dl.0, dl.1)-->(0,1)) by TARSKI:def 2;
    then
A12: t.dl.0 = (dl.0, dl.1)-->(0,1).dl.0 by FUNCT_4:13
      .= 0 by AMI_3:10,FUNCT_4:63;
A13: dl.0 in Data-Locations SCM by AMI_3:28;
    dl.1 in dom ((dl.0, dl.1)-->(0,1)) by A11,TARSKI:def 2;
    then
A14: t.dl.1 = (dl.0, dl.1)-->(0,1).dl.1 by FUNCT_4:13
      .= 1 by FUNCT_4:63;
    Exec(SubFrom(dl.0, dl.1), t).dl.0 = t.dl.0 - t.dl.1 by AMI_3:4
      .= -1 by A12,A14;
    hence thesis by A10,A12,A13;
  end;
  cluster InsCode MultBy(a,b) -> non jump-only
  for InsType of the InstructionsF of SCM;
  coherence
  proof
    set w = the State of SCM;
    set t = w+*((dl.0, dl.1)-->(1,0));
A15: InsCode MultBy(a,b) = 4
      .= InsCode MultBy(dl.0, dl.1);
A16: dom ((dl.0, dl.1)-->(1,0)) = {dl.0, dl.1} by FUNCT_4:62;
    then dl.0 in dom ((dl.0, dl.1)-->(1,0)) by TARSKI:def 2;
    then
A17: t.dl.0 = (dl.0, dl.1)-->(1,0).dl.0 by FUNCT_4:13
      .= 1 by AMI_3:10,FUNCT_4:63;
A18: dl.0 in Data-Locations SCM by AMI_3:28;
    dl.1 in dom ((dl.0, dl.1)-->(1,0)) by A16,TARSKI:def 2;
    then
A19: t.dl.1 = (dl.0, dl.1)-->(1,0).dl.1 by FUNCT_4:13
      .= 0 by FUNCT_4:63;
    Exec(MultBy(dl.0, dl.1), t).dl.0 = t.dl.0 * t.dl.1 by AMI_3:5
      .= 0 by A19;
    hence thesis by A15,A17,A18;
  end;
  cluster InsCode Divide(a,b) -> non jump-only
  for InsType of the InstructionsF of SCM;
  coherence
  proof
    set w = the State of SCM;
    set t = w+*((dl.0, dl.1)-->(7,3));
A20: InsCode Divide(a,b) = 5
      .= InsCode Divide(dl.0, dl.1);
A21: dom ((dl.0, dl.1)-->(7,3)) = {dl.0, dl.1} by FUNCT_4:62;
    then dl.0 in dom ((dl.0, dl.1)-->(7,3)) by TARSKI:def 2;
    then
A22: t.dl.0 = (dl.0, dl.1)-->(7,3).dl.0 by FUNCT_4:13
      .= 7 by AMI_3:10,FUNCT_4:63;
A23: 7 = 2 * 3 + 1;
A24: dl.0 in Data-Locations SCM by AMI_3:28;
    dl.1 in dom ((dl.0, dl.1)-->(7,3)) by A21,TARSKI:def 2;
    then t.dl.1 = (dl.0, dl.1)-->(7,3).dl.1 by FUNCT_4:13
      .= 3 by FUNCT_4:63;
    then Exec(Divide(dl.0, dl.1), t).dl.0 = 7 div (3 qua Element of NAT) by A22
,Lm2,AMI_3:6
      .= 2 by A23,NAT_D:def 1;
    hence thesis by A20,A22,A24;
  end;
end;

registration
  let a, b;
  cluster a:=b -> non jump-only;
  coherence;
  cluster AddTo(a,b) -> non jump-only;
  coherence;
  cluster SubFrom(a,b) -> non jump-only;
  coherence;
  cluster MultBy(a,b) -> non jump-only;
  coherence;
  cluster Divide(a,b) -> non jump-only;
  coherence;
end;

registration
  cluster SCM -> with_explicit_jumps;
  coherence
  proof
     let I be Instruction of SCM;
     thus JUMP I c= rng JumpPart I
     proof
      let f be object such that
A1:  f in JUMP I;
      per cases by AMI_3:24;
      suppose
        I = [0,{},{}];
        hence thesis by A1,AMI_3:26;
      end;
      suppose
        ex a,b st I = a:=b;
        hence thesis by A1;
      end;
      suppose
        ex a,b st I = AddTo(a,b);
        hence thesis by A1;
      end;
      suppose
        ex a,b st I = SubFrom(a,b);
        hence thesis by A1;
      end;
      suppose
        ex a,b st I = MultBy(a,b);
        hence thesis by A1;
      end;
      suppose
        ex a,b st I = Divide(a,b);
        hence thesis by A1;
      end;
      suppose
A2:    ex k st I = SCM-goto k;
        consider k1 such that
A3:    I = SCM-goto k1 by A2;
A4:      rng<*k1*> = {k1} by FINSEQ_1:39;
        JUMP SCM-goto k1 = {k1} by Th16;
        hence thesis by A1,A3,A4;
      end;
      suppose
A5:    ex a,k1 st I = a=0_goto k1;
        consider a, k1 such that
A6:    I = a=0_goto k1 by A5;
A7:      rng<*k1*> = {k1} by FINSEQ_1:39;
        JUMP (a=0_goto k1) = {k1} by Th18;
        hence thesis by A1,A6,A7;
      end;
      suppose
A8:    ex a,k1 st I = a>0_goto k1;
        consider a, k1 such that
A9:    I = a>0_goto k1 by A8;
A10:      rng<*k1*> = {k1} by FINSEQ_1:39;
        JUMP (a>0_goto k1) = {k1} by Th20;
        hence thesis by A1,A9,A10;
      end;
    end;
    let f being object;
    assume f in rng JumpPart I;
    then consider k being object such that
A11: k in dom JumpPart I and
A12: f = (JumpPart I).k by FUNCT_1:def 3;
    per cases by AMI_3:24;
    suppose
      I = [0,{},{}];
      then dom JumpPart I = dom {};
      hence thesis by A11;
    end;
    suppose
      ex a,b st I = a:=b;
      then consider a, b such that
A13:  I = a:=b;
      k in dom {} by A11,A13;
      hence thesis;
    end;
    suppose
      ex a,b st I = AddTo(a,b);
      then consider a, b such that
A14:  I = AddTo(a,b);
      k in dom {} by A11,A14;
      hence thesis;
    end;
    suppose
      ex a,b st I = SubFrom(a,b);
      then consider a, b such that
A15:  I = SubFrom(a,b);
      k in dom {} by A11,A15;
      hence thesis;
    end;
    suppose
      ex a,b st I = MultBy(a,b);
      then consider a, b such that
A16:  I = MultBy(a,b);
      k in dom {} by A11,A16;
      hence thesis;
    end;
    suppose
      ex a,b st I = Divide(a,b);
      then consider a, b such that
A17:  I = Divide(a,b);
      k in dom {} by A11,A17;
      hence thesis;
    end;
    suppose
      ex k st I = SCM-goto k;
      then consider k1 such that
A18:  I = SCM-goto k1;
A19:  JumpPart I = <*k1*> by A18;
      then k = 1 by A11,FINSEQ_1:90;
      then
A20:  f = k1 by A19,A12,FINSEQ_1:def 8;
      JUMP I = {k1} by A18,Th16;
      hence thesis by A20,TARSKI:def 1;
    end;
    suppose
      ex a,k st I = a=0_goto k;
      then consider a, k1 such that
A21:  I = a=0_goto k1;
A22:  JumpPart I = <*k1*> by A21;
      then k = 1  by A11,FINSEQ_1:90;
      then
A23:  f = k1 by A22,A12,FINSEQ_1:40;
      JUMP I = {k1} by A21,Th18;
      hence thesis by A23,TARSKI:def 1;
    end;
    suppose
      ex a,k1 st I = a>0_goto k1;
      then consider a, k1 such that
A24:  I = a>0_goto k1;
A25:  JumpPart I = <*k1*> by A24;
      then k = 1 by A11,FINSEQ_1:90;
      then
A26:  f = k1 by A25,A12,FINSEQ_1:40;
      JUMP I = {k1} by A24,Th20;
      hence thesis by A26,TARSKI:def 1;
    end;
  end;
end;

theorem Th23:
  IncAddr(SCM-goto i1,k) = SCM-goto(i1+k)
proof
A1: JumpPart IncAddr(SCM-goto i1,k) = k + JumpPart SCM-goto i1
   by COMPOS_0:def 9;
 then
A2: dom JumpPart IncAddr(SCM-goto i1,k) = dom JumpPart SCM-goto i1
   by VALUED_1:def 2;
A3: dom JumpPart SCM-goto(i1+k)
 = dom <*i1+k*>
    .= Seg 1 by FINSEQ_1:def 8
    .= dom <*i1*> by FINSEQ_1:def 8
    .= dom JumpPart SCM-goto i1;
A4: for x being object st x in dom JumpPart SCM-goto i1 holds (JumpPart
  IncAddr(SCM-goto i1,k)).x = (JumpPart SCM-goto(i1+k)).x
  proof
    let x be object;
    assume
A5: x in dom JumpPart SCM-goto i1;
    then x in dom <*i1*>;
    then
A6: x = 1 by FINSEQ_1:90;
    set f = (JumpPart SCM-goto i1).x;
A7: (JumpPart IncAddr(SCM-goto i1,k)).x = k + f by A5,A2,A1,VALUED_1:def 2;
    f = <*i1*>.x
      .= i1 by A6,FINSEQ_1:def 8;
    hence
    (JumpPart IncAddr(SCM-goto i1,k)).x = <*i1+k*>.x
     by A6,A7,FINSEQ_1:def 8
      .= (JumpPart SCM-goto(i1+k)).x;
  end;
A8: AddressPart IncAddr(SCM-goto i1,k) = AddressPart SCM-goto i1
          by COMPOS_0:def 9
    .= {}
    .= AddressPart SCM-goto(i1+k);
A9: InsCode IncAddr(SCM-goto i1,k) = InsCode SCM-goto i1 by COMPOS_0:def 9
    .= 6
    .= InsCode SCM-goto(i1+k);
   JumpPart IncAddr(SCM-goto i1,k) = JumpPart SCM-goto(i1+k)
     by A2,A3,A4,FUNCT_1:2;
  hence thesis by A8,A9,COMPOS_0:1;
end;

theorem Th24:
  IncAddr(a=0_goto i1,k) = a=0_goto(i1+k)
proof
A1: JumpPart IncAddr(a=0_goto i1,k) = k + JumpPart (a=0_goto i1)
  by COMPOS_0:def 9;
  then
A2: dom JumpPart IncAddr(a=0_goto i1,k) = dom JumpPart (a=0_goto i1)
  by VALUED_1:def 2;
A3: dom JumpPart (a=0_goto(i1+k)) = dom <*i1 + k*>
    .= Seg 1 by FINSEQ_1:38
    .= dom <*i1*> by FINSEQ_1:38
    .= dom JumpPart (a=0_goto i1);
A4: for x being object st x in dom JumpPart (a=0_goto i1) holds (JumpPart
IncAddr(a=0_goto i1,k)).x =
 (JumpPart (a=0_goto(i1+k))).x
  proof
    let x be object;
    assume
A5: x in dom JumpPart (a=0_goto i1);
    then x in dom <*i1*>;
    then
A6:   x = 1 by FINSEQ_1:90;
    set f = (JumpPart (a=0_goto i1)).x;
A7:   (JumpPart IncAddr(a=0_goto i1,k)).x = k + f by A1,A2,A5,VALUED_1:def 2;
      f = <*i1*>.x
        .= i1 by A6,FINSEQ_1:40;
      hence
      (JumpPart IncAddr(a=0_goto i1,k)).x
         = <*i1+k*>.x by A6,A7,FINSEQ_1:40
        .= (JumpPart (a=0_goto(i1+k))).x;
  end;
A8: AddressPart IncAddr(a=0_goto i1,k) = AddressPart (a=0_goto i1)
       by COMPOS_0:def 9
    .= <*a*>
    .= AddressPart (a=0_goto(i1+k));
A9: InsCode IncAddr(a=0_goto i1,k) = InsCode (a=0_goto i1) by COMPOS_0:def 9
    .= 7
    .= InsCode (a=0_goto(i1+k));
   JumpPart IncAddr(a=0_goto i1,k) = JumpPart (a=0_goto(i1+k))
       by A2,A3,A4,FUNCT_1:2;
  hence thesis by A8,A9,COMPOS_0:1;
end;

theorem Th25:
  IncAddr(a>0_goto i1,k) = a>0_goto(i1+k)
proof
A1: JumpPart IncAddr(a>0_goto i1,k) = k + JumpPart (a>0_goto i1)
  by COMPOS_0:def 9;
  then
A2: dom JumpPart IncAddr(a>0_goto i1,k) = dom JumpPart (a>0_goto i1)
  by VALUED_1:def 2;
A3: dom JumpPart (a>0_goto(i1+k)) = dom <*i1 + k*>
    .= Seg 1 by FINSEQ_1:38
    .= dom <*i1*> by FINSEQ_1:38
    .= dom JumpPart (a>0_goto i1);
A4: for x being object st x in dom JumpPart (a>0_goto i1) holds (JumpPart
IncAddr(a>0_goto i1,k)).x = (JumpPart (a>0_goto(i1+k))).x
  proof
    let x be object;
    assume
A5: x in dom JumpPart (a>0_goto i1);
    then x in dom <*i1*>;
      then
A6:   x = 1 by FINSEQ_1:90;
     set f = (JumpPart (a>0_goto i1)).x;
A7:   (JumpPart IncAddr(a>0_goto i1,k)).x = k + f by A1,A2,A5,VALUED_1:def 2;
      f = <*i1*>.x
        .= i1 by A6,FINSEQ_1:40;
      hence
      (JumpPart IncAddr(a>0_goto i1,k)).x
         = <*i1+k*>.x by A6,A7,FINSEQ_1:40
        .= (JumpPart (a>0_goto(i1+k))).x;
  end;
A8: AddressPart IncAddr(a>0_goto i1,k) = AddressPart (a>0_goto i1)
           by COMPOS_0:def 9
    .= <*a*>
    .= AddressPart (a>0_goto(i1+k));
A9:  InsCode IncAddr(a>0_goto i1,k) = InsCode (a>0_goto i1) by COMPOS_0:def 9
    .= 8
    .= InsCode (a>0_goto(i1+k));
   JumpPart IncAddr(a>0_goto i1,k) = JumpPart (a>0_goto(i1+k))
      by A2,A3,A4,FUNCT_1:2;
  hence thesis by A8,A9,COMPOS_0:1;
end;

registration
  cluster SCM -> IC-relocable;
  coherence
  proof
    thus SCM is IC-relocable
    proof
      let I be Instruction of SCM;
      per cases by AMI_3:24;
      suppose
        I = [0,{},{}];
        hence thesis by AMI_3:26;
      end;
      suppose
        ex a,b st I = a:=b;
        hence thesis;
      end;
      suppose
        ex a,b st I = AddTo(a,b);
        hence thesis;
      end;
      suppose
        ex a,b st I = SubFrom(a,b);
        hence thesis;
      end;
      suppose
        ex a,b st I = MultBy(a,b);
        hence thesis;
      end;
      suppose
        ex a,b st I = Divide(a,b);
        hence thesis;
      end;
      suppose
A1:     ex k st I = SCM-goto k;

        let j,k be Nat, s1 be State of SCM;
        set s2 = IncIC(s1,k);
        consider k1 such that
A2:     I = SCM-goto k1 by A1;
        reconsider i1=k1 as Element of NAT by ORDINAL1:def 12;
        thus IC Exec(IncAddr(I,j),s1) + k
         = IC Exec(SCM-goto(j+k1),s1) + k by A2,Th23
        .= j+k1+k by AMI_3:7
        .= IC Exec(SCM-goto(j+i1+k),s2) by AMI_3:7
        .= IC Exec(SCM-goto(j+k+i1),s2)
        .= IC Exec(IncAddr(I,j+k), s2) by A2,Th23;
      end;
      suppose
        ex a,k st I = a=0_goto k;
        then consider a, k1 such that
A3:     I = a=0_goto k1;
        reconsider i1=k1 as Element of NAT by ORDINAL1:def 12;
        let j,k be Nat, s1 be State of SCM;
        set s2 = IncIC(s1,k);
        a <> IC SCM & dom (IC SCM .--> (IC s1 + k)) = {IC SCM}
        by AMI_5:2;
        then not a in dom (IC SCM .--> (IC s1 + k)) by TARSKI:def 1;
        then
A4:     s1.a = s2.a by FUNCT_4:11;
        now
          per cases;
          suppose
A5:         s1.a = 0;
            thus IC Exec(IncAddr(I,j),s1) + k
         = IC Exec(a=0_goto(j+k1),s1) + k by A3,Th24
        .= j+k1+k by A5,AMI_3:8
        .= IC Exec(a=0_goto(j+i1+k),s2) by A4,A5,AMI_3:8
        .= IC Exec(a=0_goto(j+k+i1),s2)
            .= IC Exec(IncAddr(I,j+k), s2) by A3,Th24;
          end;
          suppose
A6:         s1.a <> 0;
A7:         IncAddr(I,j) = a=0_goto(i1+j) by A3,Th24;
A8:         IncAddr(I,j+k) = a=0_goto(i1+(j+k)) by A3,Th24;
            IC SCM in dom (IC SCM .--> (IC s1 + k)) by TARSKI:def 1;
            then
A9:         IC s2 = (IC SCM .--> (IC s1 + k)).IC SCM by FUNCT_4:13
              .= (IC s1 + k) by FUNCOP_1:72;
            thus IC Exec(IncAddr(I,j),s1) + k
              = IC s1 + 1 + k by A7,A6,AMI_3:8
             .= IC s1 + 1 + k
             .= IC s2 + 1 by A9
             .= IC Exec(IncAddr(I,j+k), s2) by A8,A6,A4,AMI_3:8;
          end;
        end;
        hence thesis;
      end;
      suppose
        ex a,k st I = a>0_goto k;
        then consider a, k1 such that
A10:    I = a>0_goto k1;
        reconsider i1=k1 as Element of NAT by ORDINAL1:def 12;
        let j,k be Nat, s1 be State of SCM;
        set s2 = IncIC(s1,k);
        a <> IC SCM & dom (IC SCM .--> (IC s1 + k)) = {IC SCM}
        by AMI_5:2;
        then not a in dom (IC SCM .--> (IC s1 + k)) by TARSKI:def 1;
        then
A11:    s1.a = s2.a by FUNCT_4:11;
          per cases;
          suppose
A12:        s1.a > 0;
            thus IC Exec(IncAddr(I,j),s1) + k
         = IC Exec(a>0_goto(j+k1),s1) + k by A10,Th25
        .= j+k1+k by A12,AMI_3:9
        .= IC Exec(a>0_goto(j+i1+k),s2) by A11,A12,AMI_3:9
        .= IC Exec(a>0_goto(j+k+i1),s2)
            .= IC Exec(IncAddr(I,j+k), s2) by A10,Th25;
          end;
          suppose
A13:         s1.a <= 0;
A14:         IncAddr(I,j) = a>0_goto(i1+j) by A10,Th25;
A15:         IncAddr(I,j+k) = a>0_goto(i1+(j+k)) by A10,Th25;
            IC SCM in dom (IC SCM .--> (IC s1 + k)) by TARSKI:def 1;
            then
A16:         IC s2 = (IC SCM .--> (IC s1 + k)).IC SCM by FUNCT_4:13
              .= (IC s1 + k) by FUNCOP_1:72;
            thus IC Exec(IncAddr(I,j),s1) + k
              = IC s1 + 1 + k by A14,A13,AMI_3:9
             .= IC s1 + 1 + k
             .= IC s2 + 1 by A16
             .= IC Exec(IncAddr(I,j+k), s2) by A15,A13,A11,AMI_3:9;
          end;
      end;
    end;
  end;
end;