consider w being State of SCM ;
set t = w +* ((dl. 0 ),(dl. 1) --> 0 ,1);
A1: InsCode (a := b) = 1 by MCART_1:7
.= InsCode ((dl. 0 ) := (dl. 1)) by MCART_1:7 ;
A2: dl. 0 <> IC SCM by AMI_3:57;
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