let a be Int-Location ; :: thesis:
let f be FinSeq-Location ; :: thesis:
A1: InsCode (f :=<0,...,0> a) = 12 by SCMFSA_2:53;
dom (product" (AddressParts (InsCode (f :=<0,...,0> a)))) = {1,2} by Th42, SCMFSA_2:53;
then A2: 1 in dom (product" (AddressParts (InsCode (f :=<0,...,0> a)))) by TARSKI:def 2;

hereby :: according to TARSKI:def 3,XBOOLE_0:def 10 :: thesis:

let x be set ; :: thesis:
assume x in (product" (AddressParts (InsCode (f :=<0,...,0> a)))) . 1 ; :: thesis:
then x in pi (AddressParts (InsCode (f :=<0,...,0> a))),1 by A2, CARD_3:93;
then consider g being Function such that
A3: g in AddressParts (InsCode (f :=<0,...,0> a)) and
A4: x = g . 1 by CARD_3:def 6;
consider I being Instruction of SCM+FSA such that
A5: g = AddressPart I and
A6: InsCode I = InsCode (f :=<0,...,0> a) by A3;
consider a being Int-Location , f being FinSeq-Location such that
A7: I = f :=<0,...,0> a by A1, A6, SCMFSA_2:65;
g = <*a,f*> by A5, A7, MCART_1:def 2;
then x = a by A4, FINSEQ_1:61;
hence x in SCM+FSA-Data-Loc by SCMFSA_2:def 4; :: thesis:

end;

let x be set ; :: according to TARSKI:def 3 :: thesis:
assume x in SCM+FSA-Data-Loc ; :: thesis:
then reconsider x = x as Int-Location by SCMFSA_2:28;
A8: AddressPart (f :=<0,...,0> x) = <*x,f*> by MCART_1:def 2;
InsCode (f :=<0,...,0> x) = InsCode (f :=<0,...,0> a) by A1, SCMFSA_2:53;
then A9: <*x,f*> in AddressParts (InsCode (f :=<0,...,0> a)) by A8;
<*x,f*> . 1 = x by FINSEQ_1:61;
then x in pi (AddressParts (InsCode (f :=<0,...,0> a))),1 by A9, CARD_3:def 6;
hence x in (product" (AddressParts (InsCode (f :=<0,...,0> a)))) . 1 by A2, CARD_3:93; :: thesis: