let k1, k2 be Integer; :: thesis: for a, b being Int_position holds not SubFrom (a,k1,b,k2) is halting
let a, b be Int_position ; :: thesis: not SubFrom (a,k1,b,k2) is halting
consider s being State of SCMPDS;
(Exec ((SubFrom (a,k1,b,k2)),s)) . (IC SCMPDS) = succ (IC s) by Th62;
hence not SubFrom (a,k1,b,k2) is halting by Th76; :: thesis: verum