reserve S for with_non_trivial_Instructions COM-Struct;
reserve i,j,k for No-StopCode Instruction of S,
        I,J,K for MacroInstruction of S;
reserve i1,i2,i3,i4,i5,i6 for No-StopCode Instruction of S;
reserve I,J for non empty NAT-defined finite Function;
reserve I,J for MacroInstruction of S;

theorem Th44:
 (i ';' j).1 = IncAddr(j,1)
proof
  0 in dom Macro j by COMPOS_1:57;
  then
A1: (Macro j)/.0 = (Macro j).0 by PARTFUN1:def 6
   .= j by COMPOS_1:58;
A2: LastLoc Macro j = 1 by Th29;
 thus (i ';' j).1 = (i ';' Macro j).(LastLoc Macro i + 0) by Th29
     .= IncAddr((Macro j)/.0,LastLoc Macro i) by A2,Th43
     .= IncAddr(j,1) by A1,Th29;
end;
