
theorem
  for am,bm,cm,dm,cin being set holds InnerVertices BitFTA3Str(am,bm,cm,
  dm,cin) is Relation
proof
  let am,bm,cm,dm,cin be set;
  set S1 = BitGFA3Str(am,bm,cm);
  set A1 = GFA3AdderOutput(am,bm,cm);
  set S2 = BitGFA3Str(A1,cin,dm);
  InnerVertices S1 is Relation & InnerVertices S2 is Relation by GFACIRC1:128;
  hence thesis by FACIRC_1:3;
end;
