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 Th55:
  (i1 ';' i2 ';' i3 ';' i4 ';' i5).3 = IncAddr(i4,3)
 proof
A1:  LastLoc(i1 ';' i2 ';' i3 ';' i4) = 4 by Th32;
  thus (i1 ';' i2 ';' i3 ';' i4 ';' i5).3
         = (i1 ';' i2 ';' i3 ';' i4).3 by Th23,A1,Th28
        .= IncAddr(i4,3) by Th54;
 end;
