let i be Instruction of SCM+FSA; :: thesis:
let k be Nat; :: thesis:
InsCode i <= 12 by SCMFSA_2:16;
then not not InsCode i = 0 & ... & not InsCode i = 12 ;

per cases ;

suppose InsCode i = 0 ; :: thesis:

then i = halt SCM+FSA by SCMFSA_2:95;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 1 ; :: thesis:

then ex a, b being Int-Location st i = a := b by SCMFSA_2:30;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 2 ; :: thesis:

then ex a, b being Int-Location st i = AddTo (a,b) by SCMFSA_2:31;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 3 ; :: thesis:

then ex a, b being Int-Location st i = SubFrom (a,b) by SCMFSA_2:32;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 4 ; :: thesis:

then ex a, b being Int-Location st i = MultBy (a,b) by SCMFSA_2:33;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 5 ; :: thesis:

then ex a, b being Int-Location st i = Divide (a,b) by SCMFSA_2:34;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 6 ; :: thesis:

then consider l being Nat such that
A1: i = goto l by SCMFSA_2:35;
IncAddr (i,k) = goto (l + k) by A1, SCMFSA_4:1;
hence UsedIntLoc (IncAddr (i,k)) = {} by Th15
.= UsedIntLoc i by A1, Th15 ;
:: thesis:

end;

suppose InsCode i = 7 ; :: thesis:

then consider l being Nat, a being Int-Location such that
A2: i = a =0_goto l by SCMFSA_2:36;
IncAddr (i,k) = a =0_goto (l + k) by A2, SCMFSA_4:2;
hence UsedIntLoc (IncAddr (i,k)) = {a} by Th16
.= UsedIntLoc i by A2, Th16 ;
:: thesis:

end;

suppose InsCode i = 8 ; :: thesis:

then consider l being Nat, a being Int-Location such that
A3: i = a >0_goto l by SCMFSA_2:37;
IncAddr (i,k) = a >0_goto (l + k) by A3, SCMFSA_4:3;
hence UsedIntLoc (IncAddr (i,k)) = {a} by Th16
.= UsedIntLoc i by A3, Th16 ;
:: thesis:

end;

suppose InsCode i = 9 ; :: thesis:

then ex a, b being Int-Location ex f being FinSeq-Location st i = b := (f,a) by SCMFSA_2:38;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 10 ; :: thesis:

then ex a, b being Int-Location ex f being FinSeq-Location st i = (f,a) := b by SCMFSA_2:39;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 11 ; :: thesis:

then ex a being Int-Location ex f being FinSeq-Location st i = a :=len f by SCMFSA_2:40;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

suppose InsCode i = 12 ; :: thesis:

then ex a being Int-Location ex f being FinSeq-Location st i = f :=<0,...,0> a by SCMFSA_2:41;
hence UsedIntLoc i = UsedIntLoc (IncAddr (i,k)) by COMPOS_0:4; :: thesis:

end;

end;