Remark code_tail_no_bigger:
  forall pos c1 c2, code_tail pos c1 c2 -> (length c2 <= length c1)%nat.Remark code_tail_unique:
  forall fn c pos pos',
  code_tail pos fn c -> code_tail pos' fn c -> pos = pos'.

(* Specifications: *)
Lemma return_address_offset_correct: forall ge b ofs fb f c tf tc ofs', transl_code_at_pc ge (Vptr b ofs) fb f c false tf tc -> return_address_offset f c ofs' -> ofs' = ofs.