
theorem
  for ap,bm,cp,dm,cin being set holds InnerVertices BitFTA1Str(ap,bm,cp,
  dm,cin) is Relation
proof
  let ap,bm,cp,dm,cin be set;
  set S1 = BitGFA1Str(ap,bm,cp);
  set A1 = GFA1AdderOutput(ap,bm,cp);
  set S2 = BitGFA2Str(A1,cin,dm);
  InnerVertices S1 is Relation & InnerVertices S2 is Relation by GFACIRC1:64,96
;
  hence thesis by FACIRC_1:3;
end;
