for P being Instruction-Sequence of SCMPDS st GCD-Algorithm c= P holds
for s being 0 -started State of SCMPDS holds
( IC (Comput (P,s,4)) = 5 & (Comput (P,s,4)) . GBP = 0 & (Comput (P,s,4)) . SBP = 7 & (Comput (P,s,4)) . (intpos (7 + RetIC)) = 2 & (Comput (P,s,4)) . (intpos 9) = s . (intpos 9) & (Comput (P,s,4)) . (intpos 10) = s . (intpos 10) )