consider w being State of SCM;
set t = w +* (((dl. 0),(dl. 1)) --> (0,1));
A1: InsCode (a := b) = 1 by RECDEF_2:def 1
.= InsCode ((dl. 0) := (dl. 1)) by RECDEF_2:def 1 ;
A2: dl. 0 in Data-Locations SCM by AMI_3:73;
A3: dom (((dl. 0),(dl. 1)) --> (0,1)) = {(dl. 0),(dl. 1)} by FUNCT_4:65;
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: (w +* (((dl. 0),(dl. 1)) --> (0,1))) . (dl. 0) = (((dl. 0),(dl. 1)) --> (0,1)) . (dl. 0) by FUNCT_4:14
.= 0 by AMI_3:52, FUNCT_4:66 ;
(Exec (((dl. 0) := (dl. 1)),(w +* (((dl. 0),(dl. 1)) --> (0,1))))) . (dl. 0) = (w +* (((dl. 0),(dl. 1)) --> (0,1))) . (dl. 1) by AMI_3:8
.= (((dl. 0),(dl. 1)) --> (0,1)) . (dl. 1) by A4, FUNCT_4:14
.= 1 by FUNCT_4:66 ;
hence for b₁ being InsType of SCM st b₁ = InsCode (a := b) holds
not b₁ is jump-only by A1, A2, A5, AMISTD_1:def 3; :: thesis: verum