let s be State of ; :: thesis: for I being Program of
for a being Int_position
for k1 being Integer st s . (DataLoc (s . a),k1) <> 0 holds
IExec (if=0 a,k1,I),s = s +* (Start-At (inspos ((card I) + 1)))
let I be Program of ; :: thesis: for a being Int_position
for k1 being Integer st s . (DataLoc (s . a),k1) <> 0 holds
IExec (if=0 a,k1,I),s = s +* (Start-At (inspos ((card I) + 1)))
let a be Int_position ; :: thesis: for k1 being Integer st s . (DataLoc (s . a),k1) <> 0 holds
IExec (if=0 a,k1,I),s = s +* (Start-At (inspos ((card I) + 1)))
let k1 be Integer; :: thesis: ( s . (DataLoc (s . a),k1) <> 0 implies IExec (if=0 a,k1,I),s = s +* (Start-At (inspos ((card I) + 1))) )
set b = DataLoc (s . a),k1;
set IF = if=0 a,k1,I;
set pIF = stop (if=0 a,k1,I);
set IsIF = Initialized (stop (if=0 a,k1,I));
set s3 = s +* (Initialized (stop (if=0 a,k1,I)));
set s4 = Computation (s +* (Initialized (stop (if=0 a,k1,I)))),1;
set i = a,k1 <>0_goto ((card I) + 1);
set SAl = Start-At (inspos ((card I) + 1));
A1: IC (s +* (Initialized (stop (if=0 a,k1,I)))) = inspos 0 by FUNCT_4:26, SCMPDS_5:18;
A2: not DataLoc (s . a),k1 in dom (Initialized (stop (if=0 a,k1,I))) by SCMPDS_4:31;
not a in dom (Initialized (stop (if=0 a,k1,I))) by SCMPDS_4:31;
then A3: (s +* (Initialized (stop (if=0 a,k1,I)))) . (DataLoc ((s +* (Initialized (stop (if=0 a,k1,I)))) . a),k1) = (s +* (Initialized (stop (if=0 a,k1,I)))) . (DataLoc (s . a),k1) by FUNCT_4:12
.= s . (DataLoc (s . a),k1) by A2, FUNCT_4:12 ;
A4: Computation (s +* (Initialized (stop (if=0 a,k1,I)))),(0 + 1) = Following (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),0 ) by AMI_1:14
.= Following (s +* (Initialized (stop (if=0 a,k1,I)))) by AMI_1:13
.= Exec (a,k1 <>0_goto ((card I) + 1)),(s +* (Initialized (stop (if=0 a,k1,I)))) by Th22 ;
assume s . (DataLoc (s . a),k1) <> 0 ; :: thesis: IExec (if=0 a,k1,I),s = s +* (Start-At (inspos ((card I) + 1)))
then A5: IC (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),1) = ICplusConst (s +* (Initialized (stop (if=0 a,k1,I)))),((card I) + 1) by A4, A3, SCMPDS_2:67
.= inspos (0 + ((card I) + 1)) by A1, Th23 ;
Initialized (stop (if=0 a,k1,I)) c= s +* (Initialized (stop (if=0 a,k1,I))) by FUNCT_4:26;
then A6: stop (if=0 a,k1,I) c= Computation (s +* (Initialized (stop (if=0 a,k1,I)))),1 by AMI_1:81, SCMPDS_4:57;
A7: card (if=0 a,k1,I) = (card I) + 1 by Th15;
then inspos ((card I) + 1) in dom (stop (if=0 a,k1,I)) by Th25;
then (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),1) . (inspos ((card I) + 1)) = (stop (if=0 a,k1,I)) . (inspos ((card I) + 1)) by A6, GRFUNC_1:8
.= halt SCMPDS by A7, Th25 ;
then A8: CurInstr (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),1) = halt SCMPDS by A5;
then A9: ProgramPart (s +* (Initialized (stop (if=0 a,k1,I)))) halts_on s +* (Initialized (stop (if=0 a,k1,I))) by AMI_1:146;
A10: CurInstr (s +* (Initialized (stop (if=0 a,k1,I)))) = a,k1 <>0_goto ((card I) + 1) by Th22;

now

let l be Element of NAT ; :: thesis: ( l < 1 implies CurInstr (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),l) <> halt SCMPDS )
assume l < 1 ; :: thesis: CurInstr (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),l) <> halt SCMPDS
then l < 1 + 0 ;
then l = 0 by NAT_1:13;
then CurInstr (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),l) = CurInstr (s +* (Initialized (stop (if=0 a,k1,I)))) by AMI_1:13;
hence CurInstr (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),l) <> halt SCMPDS by A10, Th29; :: thesis: verum

end;

then for l being Element of NAT st CurInstr (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),l) = halt SCMPDS holds
1 <= l ;
then LifeSpan (s +* (Initialized (stop (if=0 a,k1,I)))) = 1 by A8, A9, AMI_1:def 46;
then A11: Computation (s +* (Initialized (stop (if=0 a,k1,I)))),1 = Result (s +* (Initialized (stop (if=0 a,k1,I)))) by A9, AMI_1:122;
A12: dom (s | NAT ) = NAT by Th1;

A13: now

A14: dom (Start-At (inspos ((card I) + 1))) = {(IC SCMPDS )} by FUNCOP_1:19;
let x be set ; :: thesis: ( x in dom (IExec (if=0 a,k1,I),s) implies (IExec (if=0 a,k1,I),s) . b₁ = (s +* (Start-At (inspos ((card I) + 1)))) . b₁ )
A15: IExec (if=0 a,k1,I),s = (Result (s +* (Initialized (stop (if=0 a,k1,I))))) +* (s | NAT ) by SCMPDS_4:def 8;
assume A16: x in dom (IExec (if=0 a,k1,I),s) ; :: thesis: (IExec (if=0 a,k1,I),s) . b₁ = (s +* (Start-At (inspos ((card I) + 1)))) . b₁

per cases ( x is Int_position or x = IC SCMPDS or x is Instruction-Location of SCMPDS ) by A16, SCMPDS_4:20;

suppose A17: x is Int_position ; :: thesis: (IExec (if=0 a,k1,I),s) . b₁ = (s +* (Start-At (inspos ((card I) + 1)))) . b₁

then x <> IC SCMPDS by SCMPDS_2:52;
then A18: not x in dom (Start-At (inspos ((card I) + 1))) by A14, TARSKI:def 1;

now

assume x in dom (s | NAT ) ; :: thesis: contradiction
then reconsider l = x as Instruction-Location of SCMPDS by A12, AMI_1:def 4;
l = x ;
hence contradiction by A17, SCMPDS_2:53; :: thesis: verum

end;

hence (IExec (if=0 a,k1,I),s) . x = (Computation (s +* (Initialized (stop (if=0 a,k1,I)))),1) . x by A11, A15, FUNCT_4:12
.= (s +* (Initialized (stop (if=0 a,k1,I)))) . x by A4, A17, SCMPDS_2:67
.= s . x by A17, SCMPDS_5:19
.= (s +* (Start-At (inspos ((card I) + 1)))) . x by A18, FUNCT_4:12 ;
:: thesis: verum

end;

suppose A19: x = IC SCMPDS ; :: thesis: (IExec (if=0 a,k1,I),s) . b₁ = (s +* (Start-At (inspos ((card I) + 1)))) . b₁

now

assume x in dom (s | NAT ) ; :: thesis: contradiction
then reconsider l = x as Instruction-Location of SCMPDS by A12, AMI_1:def 4;
l = x ;
hence contradiction by A19, AMI_1:48; :: thesis: verum

end;

hence (IExec (if=0 a,k1,I),s) . x = inspos ((card I) + 1) by A5, A11, A15, A19, FUNCT_4:12
.= (s +* (Start-At (inspos ((card I) + 1)))) . x by A19, Lm7 ;
:: thesis: verum

end;

suppose x is Instruction-Location of SCMPDS ; :: thesis: (IExec (if=0 a,k1,I),s) . b₁ = (s +* (Start-At (inspos ((card I) + 1)))) . b₁

hence (IExec (if=0 a,k1,I),s) . x = (s +* (Start-At (inspos ((card I) + 1)))) . x by Th27; :: thesis: verum

end;

end;

end;

dom (IExec (if=0 a,k1,I),s) = the carrier of SCMPDS by AMI_1:79
.= dom (s +* (Start-At (inspos ((card I) + 1)))) by AMI_1:79 ;
hence IExec (if=0 a,k1,I),s = s +* (Start-At (inspos ((card I) + 1))) by A13, FUNCT_1:9; :: thesis: verum