for P1, P2 being Instruction-Sequence of SCMPDS
for s being 0 -started State of SCMPDS
for I being parahalting Program of st stop I c= P1 & stop I c= P2 holds
for k being Nat holds
( Comput (P1,s,k) = Comput (P2,s,k) & CurInstr (P1,(Comput (P1,s,k))) = CurInstr (P2,(Comput (P2,s,k))) )