Require Import ADPUnif.
Require Import ADecomp.
Require Import ADuplicateSymb.
Require Import AGraph.
Require Import ATrs.
Require Import List.
Require Import LogicUtil.
Require Import SN.
Require Import VecUtil.

Open Scope nat_scope.
(* termination problem *)

Module M.
  Inductive symb : Type :=
  | _2nd_1 : symb
  | activate : symb
  | cons : symb
  | from : symb
  | n__cons : symb
  | n__from : symb
  | s : symb.
End M.

Lemma eq_symb_dec : forall f g : M.symb, {f=g}+{~f=g}.

Proof.
decide equality.
Defined.

Open Scope nat_scope.
Definition ar (s : M.symb) : nat :=
  match s with
  | M._2nd_1 => 1
  | M.activate => 1
  | M.cons => 2
  | M.from => 1
  | M.n__cons => 2
  | M.n__from => 1
  | M.s => 1
  end.

Definition s0 := ASignature.mkSignature ar eq_symb_dec.
Definition s0_p := s0.
Definition V0 := @ATerm.Var s0.
Definition F0 := @ATerm.Fun s0.
Definition R0 := @ATrs.mkRule s0.

Module S0.
  Definition _2nd_1 x1 := F0 M._2nd_1 (Vcons x1 Vnil).
  Definition activate x1 := F0 M.activate (Vcons x1 Vnil).
  Definition cons x2 x1 := F0 M.cons (Vcons x2 (Vcons x1 Vnil)).
  Definition from x1 := F0 M.from (Vcons x1 Vnil).
  Definition n__cons x2 x1 := F0 M.n__cons (Vcons x2 (Vcons x1 Vnil)).
  Definition n__from x1 := F0 M.n__from (Vcons x1 Vnil).
  Definition s x1 := F0 M.s (Vcons x1 Vnil).
End S0.

Definition E :=
   @nil (@ATrs.rule s0).

Definition R :=
   R0 (S0._2nd_1 (S0.cons (V0 0) (S0.n__cons (V0 1) (V0 2))))
      (S0.activate (V0 1))
:: R0 (S0.from (V0 0))
      (S0.cons (V0 0) (S0.n__from (S0.s (V0 0))))
:: R0 (S0.cons (V0 0) (V0 1))
      (S0.n__cons (V0 0) (V0 1))
:: R0 (S0.from (V0 0))
      (S0.n__from (V0 0))
:: R0 (S0.activate (S0.n__cons (V0 0) (V0 1)))
      (S0.cons (V0 0) (V0 1))
:: R0 (S0.activate (S0.n__from (V0 0)))
      (S0.from (V0 0))
:: R0 (S0.activate (V0 0))
      (V0 0)
:: @nil (@ATrs.rule s0).

Definition rel := ATrs.red_mod E R.

(* symbol marking *)

Definition s1 := dup_sig s0.
Definition s1_p := s0.
Definition V1 := @ATerm.Var s1.
Definition F1 := @ATerm.Fun s1.
Definition R1 := @ATrs.mkRule s1.

Module S1.
  Definition h_2nd_1 x1 := F1 (hd_symb s1_p M._2nd_1) (Vcons x1 Vnil).
  Definition _2nd_1 x1 := F1 (int_symb s1_p M._2nd_1) (Vcons x1 Vnil).
  Definition hactivate x1 := F1 (hd_symb s1_p M.activate) (Vcons x1 Vnil).
  Definition activate x1 := F1 (int_symb s1_p M.activate) (Vcons x1 Vnil).
  Definition hcons x2 x1 := F1 (hd_symb s1_p M.cons) (Vcons x2 (Vcons x1 Vnil)).
  Definition cons x2 x1 := F1 (int_symb s1_p M.cons) (Vcons x2 (Vcons x1 Vnil)).
  Definition hfrom x1 := F1 (hd_symb s1_p M.from) (Vcons x1 Vnil).
  Definition from x1 := F1 (int_symb s1_p M.from) (Vcons x1 Vnil).
  Definition hn__cons x2 x1 := F1 (hd_symb s1_p M.n__cons) (Vcons x2 (Vcons x1 Vnil)).
  Definition n__cons x2 x1 := F1 (int_symb s1_p M.n__cons) (Vcons x2 (Vcons x1 Vnil)).
  Definition hn__from x1 := F1 (hd_symb s1_p M.n__from) (Vcons x1 Vnil).
  Definition n__from x1 := F1 (int_symb s1_p M.n__from) (Vcons x1 Vnil).
  Definition hs x1 := F1 (hd_symb s1_p M.s) (Vcons x1 Vnil).
  Definition s x1 := F1 (int_symb s1_p M.s) (Vcons x1 Vnil).
End S1.

(* graph decomposition 1 *)

Definition cs1 : list (list (@ATrs.rule s1)) :=

   (  R1 (S1.hactivate (S1.n__cons (V1 0) (V1 1)))
         (S1.hcons (V1 0) (V1 1))
   :: nil)

:: (  R1 (S1.hfrom (V1 0))
         (S1.hcons (V1 0) (S1.n__from (S1.s (V1 0))))
   :: nil)

:: (  R1 (S1.hactivate (S1.n__from (V1 0)))
         (S1.hfrom (V1 0))
   :: nil)

:: (  R1 (S1.h_2nd_1 (S1.cons (V1 0) (S1.n__cons (V1 1) (V1 2))))
         (S1.hactivate (V1 1))
   :: nil)

:: nil.

(* termination proof *)

Lemma termination : WF rel.

Proof.
unfold rel.
dp_trans.
mark.
let D := fresh "D" in let R := fresh "R" in set_rules_to D; set_mod_rules_to R;
graph_decomp (dpg_unif_N 100 R D) cs1; subst D; subst R.
dpg_unif_N_correct.
left. co_scc.
left. co_scc.
left. co_scc.
left. co_scc.
Qed.