let s be State of SCMPDS ; :: thesis: for k1, k2 being Integer
for a being Int_position holds
( (Exec (a,k1 := k2),s) . (IC SCMPDS ) = succ (IC s) & (Exec (a,k1 := k2),s) . (DataLoc (s . a),k1) = k2 & ( for b being Int_position st b <> DataLoc (s . a),k1 holds
(Exec (a,k1 := k2),s) . b = s . b ) )
let k1, k2 be Integer; :: thesis: for a being Int_position holds
( (Exec (a,k1 := k2),s) . (IC SCMPDS ) = succ (IC s) & (Exec (a,k1 := k2),s) . (DataLoc (s . a),k1) = k2 & ( for b being Int_position st b <> DataLoc (s . a),k1 holds
(Exec (a,k1 := k2),s) . b = s . b ) )
let a be Int_position ; :: thesis: ( (Exec (a,k1 := k2),s) . (IC SCMPDS ) = succ (IC s) & (Exec (a,k1 := k2),s) . (DataLoc (s . a),k1) = k2 & ( for b being Int_position st b <> DataLoc (s . a),k1 holds
(Exec (a,k1 := k2),s) . b = s . b ) )
reconsider S = s as SCMPDS-State by PBOOLE:155;
reconsider mk = a as Element of SCM-Data-Loc by Def2;
reconsider I = a,k1 := k2 as Element of SCMPDS-Instr ;
set A2 = Address_Add S,(I P31address ),(I P32const );
set S1 = SCM-Chg S,(Address_Add S,(I P31address ),(I P32const )),(I P33const );
reconsider i = 7 as Element of Segm 14 by NAT_1:45;
A1: I = [i,{} ,<*mk,k1,k2*>] ;
then A2: I P33const = k2 by SCMPDS_1:36;
A3: Exec (a,k1 := k2),s = SCM-Exec-Res I,S by SCMPDS_1:def 25
.= SCM-Chg (SCM-Chg S,(Address_Add S,(I P31address ),(I P32const )),(I P33const )),(succ (IC S)) by A1, SCMPDS_1:def 24 ;
hence (Exec (a,k1 := k2),s) . (IC SCMPDS ) = succ (IC s) by Th6, SCMPDS_1:26; :: thesis: ( (Exec (a,k1 := k2),s) . (DataLoc (s . a),k1) = k2 & ( for b being Int_position st b <> DataLoc (s . a),k1 holds
(Exec (a,k1 := k2),s) . b = s . b ) )
A4: ( I P31address = mk & I P32const = k1 ) by A1, SCMPDS_1:36;
hence (Exec (a,k1 := k2),s) . (DataLoc (s . a),k1) = (SCM-Chg S,(Address_Add S,(I P31address ),(I P32const )),(I P33const )) . (Address_Add S,(I P31address ),(I P32const )) by A3, SCMPDS_1:27
.= k2 by A2, SCMPDS_1:30 ;
:: thesis: for b being Int_position st b <> DataLoc (s . a),k1 holds
(Exec (a,k1 := k2),s) . b = s . b
let b be Int_position ; :: thesis: ( b <> DataLoc (s . a),k1 implies (Exec (a,k1 := k2),s) . b = s . b )
reconsider mn = b as Element of SCM-Data-Loc by Def2;
assume A5: b <> DataLoc (s . a),k1 ; :: thesis: (Exec (a,k1 := k2),s) . b = s . b
thus (Exec (a,k1 := k2),s) . b = (SCM-Chg S,(Address_Add S,(I P31address ),(I P32const )),(I P33const )) . mn by A3, SCMPDS_1:27
.= s . b by A4, A5, SCMPDS_1:31 ; :: thesis: verum