let R be good Ring; :: thesis: for a, b being Data-Location of R holds not AddTo a,b is halting
let a, b be Data-Location of R; :: thesis: not AddTo a,b is halting
consider s being State of (SCM R);
(Exec (AddTo a,b),s) . (IC (SCM R)) = Next by Th14;
hence not AddTo a,b is halting by Th20; :: thesis: verum