theorem
 for i being No-StopCode Instruction of S st i is ins-loc-free
  holds Macro i is closed
proof let i be No-StopCode Instruction of S such that
A1: i is ins-loc-free;
 let i1 be Instruction of S;
 assume i1 in rng Macro i;
  then i1 in {i,halt S} by COMPOS_1:67;
  then i1 = i or i1 = halt S by TARSKI:def 2;
  then rng JumpPart i1 = {} by A1;
 hence rng JumpPart i1 c= dom Macro i;
end;
