theorem Th16:
  i = a=0_goto l or i = a>0_goto l implies UsedIntLoc i = {a}
proof
  reconsider ab = {a} as Element of Fin Int-Locations by FINSUB_1:def 5;
  assume
A1: i = a=0_goto l or i = a>0_goto l;
  then InsCode i = 7 or InsCode i = 8 by SCMFSA_2:24,25;
  then UsedIntLoc i = ab by A1,Def1;
  hence thesis;
end;
