
theorem
  for am,bp,cm,dp,cin being set holds InnerVertices BitFTA2Str(am,bp,cm,
  dp,cin) is Relation
proof
  let am,bp,cm,dp,cin be set;
  set S1 = BitGFA2Str(am,bp,cm);
  set A1 = GFA2AdderOutput(am,bp,cm);
  set S2 = BitGFA1Str(A1,cin,dp);
  InnerVertices S1 is Relation & InnerVertices S2 is Relation by GFACIRC1:64,96
;
  hence thesis by FACIRC_1:3;
end;
