let a2 be Nat; [6,<*a2*>,{}] in SCM-Instr
reconsider x = 6 as Element of Segm 9 by NAT_1:44;
[x,<*a2*>,{}] in { [J,<*a*>,{}] where J is Element of Segm 9, a is Nat : J = 6 }
;
then
[x,<*a2*>,{}] in {[SCM-Halt,{},{}]} \/ { [J,<*a*>,{}] where J is Element of Segm 9, a is Nat : J = 6 }
by XBOOLE_0:def 3;
then
[x,<*a2*>,{}] in ({[SCM-Halt,{},{}]} \/ { [J,<*a*>,{}] where J is Element of Segm 9, a is Nat : J = 6 } ) \/ { [K,<*a1*>,<*b1*>] where K is Element of Segm 9, a1 is Nat, b1 is Element of SCM-Data-Loc : K in {7,8} }
by XBOOLE_0:def 3;
hence
[6,<*a2*>,{}] in SCM-Instr
by XBOOLE_0:def 3; verum