
theorem
  for ap,bp,cp,dp,cin being set holds InnerVertices BitFTA0Str(ap,bp,cp,
  dp,cin) is Relation
proof
  let ap,bp,cp,dp,cin be set;
  set S1 = BitGFA0Str(ap,bp,cp);
  set A1 = GFA0AdderOutput(ap,bp,cp);
  set S2 = BitGFA0Str(A1,cin,dp);
  InnerVertices S1 is Relation & InnerVertices S2 is Relation by GFACIRC1:32;
  hence thesis by FACIRC_1:3;
end;
