(* ** Some Hoare Rules *)
From Undecidability Require Export TM.Compound.Multi TM.Combinators.Combinators.
From Undecidability.TM.Hoare Require Import HoareLogic HoareRegister.
(* *** Nop *)
(* A classic example for Hoare logic *)
(* *** [Relabel] *)

Lemma Relabel_Spec (sig : finType) (F1 F2 : finType) (n : nat) (P : Assert sig n) (Q : F1 -> Assert sig n) (pM : pTM sig F1 n) (f : F1->F2) :
Triple P pM Q ->
Triple P (Relabel pM f) (fun y' t => exists y'', y' = f y'' /\ Q y'' t).