let R be good Ring; :: thesis: for a, b being Data-Location of R holds not MultBy a,b is halting
let a, b be Data-Location of R; :: thesis: not MultBy a,b is halting
consider s being State of (SCM R);
(Exec (MultBy a,b),s) . (IC (SCM R)) = Next by Th16;
hence not MultBy a,b is halting by Th20; :: thesis: verum