let R be good Ring; :: thesis: for a, b being Data-Location of R holds not SubFrom (a,b) is halting
let a, b be Data-Location of R; :: thesis: not SubFrom (a,b) is halting
set s = the State of (SCM R);
(Exec ((SubFrom (a,b)), the State of (SCM R))) . (IC ) = succ (IC the State of (SCM R)) by Th15;
hence not SubFrom (a,b) is halting by Th20; :: thesis: verum