diff --git a/projects/lib/GmpAux.v b/projects/lib/GmpAux.v
index 40a1bcb..326dbc1 100755
--- a/projects/lib/GmpAux.v
+++ b/projects/lib/GmpAux.v
@@ -112,6 +112,67 @@ Proof.
     reflexivity.
 Qed.
 
+Lemma list_last_cons: forall (a: Z) (l: list Z),
+  l <> nil ->
+  last (a :: l) 0 = last l 0.
+Proof.
+  intros.
+  destruct l.
+  + contradiction.
+  + simpl.
+    reflexivity.
+Qed.
+
+Lemma list_last_to_Znth: forall (l: list Z),
+  l <> nil ->
+  last l 0 = Znth ((Zlength l) - 1) l 0.
+Proof.
+  intros.
+  induction l.
+  + auto.
+  + destruct l.
+    - simpl.
+      rewrite Znth0_cons.
+      lia.
+    - pose proof (@nil_cons Z z l).
+      specialize (IHl ltac:(auto)); clear H0.
+      rewrite list_last_cons; [ | pose proof (@nil_cons Z z l); auto ].
+      rewrite IHl.
+      pose proof (Zlength_cons a (z :: l)).
+      unfold Z.succ in H0; rewrite H0; clear H0.
+      pose proof (Zlength_nonneg l).
+      pose proof (Zlength_cons z l); unfold Z.succ in H1.
+      pose proof (Znth_cons (Zlength (z :: l)) a (z :: l) 0 ltac:(lia)).
+      assert (Zlength (z :: l) + 1 - 1 = Zlength (z :: l)). { lia. }
+      rewrite H3; clear H3.
+      rewrite H2.
+      reflexivity.
+Qed.
+
+Lemma Zlength_removelast: forall (l: list Z),
+  l <> [] ->
+  Zlength (removelast l) = Zlength l - 1.
+Proof.
+  intros.
+  induction l.
+  + contradiction.
+  + destruct l.
+    - simpl.
+      rewrite Zlength_nil.
+      lia.
+    - pose proof (@nil_cons Z z l).
+      specialize (IHl ltac:(auto)).
+      assert (removelast (a :: z :: l) = a :: removelast(z :: l)). {
+        simpl.
+        reflexivity.
+      }
+      rewrite H1; clear H1.
+      repeat rewrite Zlength_cons; unfold Z.succ.
+      rewrite IHl.
+      rewrite Zlength_cons; unfold Z.succ.
+      lia.
+Qed.
+
 Lemma store_array_rec_false: forall x storeA lo hi (l: list Z),
   lo > hi ->
   store_array_rec storeA x lo hi l |-- [| False |].
diff --git a/projects/lib/GmpNumber.v b/projects/lib/GmpNumber.v
index d6dacae..8c2e754 100755
--- a/projects/lib/GmpNumber.v
+++ b/projects/lib/GmpNumber.v
@@ -47,7 +47,34 @@ Definition list_store_Z (data: list Z) (n: Z): Prop :=
 
 Definition mpd_store_Z (ptr: addr) (n: Z) (size: Z) (cap: Z): Assertion :=
   EX data,
-    mpd_store_list ptr data cap && [| list_store_Z data n |] && [| size = Zlength data |].
+    [| list_store_Z data n |] && [| size = Zlength data |] && mpd_store_list ptr data cap.
+
+Definition list_store_Z_compact (data: list Z) (n: Z): Prop :=
+  list_to_Z data = n /\ last data 0 >= 1 /\ list_within_bound data.
+
+Definition mpd_store_Z_compact (ptr: addr) (n size cap: Z): Assertion :=
+  EX data,
+    [| list_store_Z_compact data n |] && [| size = Zlength data |] && mpd_store_list ptr data cap.
+
+Lemma list_store_Z_normal_to_compact: forall (data: list Z) (n: Z),
+  list_store_Z data n -> 
+  last data 0 >= 1 ->
+  list_store_Z_compact data n.
+Proof.
+  unfold list_store_Z_compact, list_store_Z.
+  intros.
+  tauto.
+Qed.
+
+Lemma list_store_Z_compact_to_normal: forall data n,
+  list_store_Z_compact data n ->
+  list_store_Z data n.
+Proof.
+  intros.
+  unfold list_store_Z_compact in H.
+  unfold list_store_Z.
+  tauto.
+Qed.
 
 Lemma list_store_Z_injection: forall l1 l2 n1 n2,
   list_store_Z l1 n1 ->
@@ -450,6 +477,95 @@ Proof.
   lia.
 Qed.
 
+Lemma list_store_Z_compact_cmp: forall l1 l2 n1 n2 i,
+  0 <= i < Zlength l1 ->
+  Zlength l1 = Zlength l2 ->
+  list_store_Z_compact l1 n1 ->
+  list_store_Z_compact l2 n2 ->
+  sublist (i + 1) (Zlength l1) l1 = sublist (i + 1) (Zlength l2) l2 ->
+  Znth i l1 0 < Znth i l2 0 ->
+  n1 < n2.
+Proof.
+  intros.
+  apply list_store_Z_compact_to_normal in H1, H2.
+  apply (list_store_Z_cmp l1 l2 n1 n2 i); tauto.
+Qed.
+
+Lemma list_store_Z_cmp_length: forall l1 l2 n1 n2,
+  Zlength l1 < Zlength l2 ->
+  list_store_Z_compact l1 n1 ->
+  list_store_Z_compact l2 n2 ->
+  n1 < n2.
+Proof.
+  intros.
+  unfold list_store_Z_compact in *.
+  destruct H0, H1, H2, H3.
+  assert (list_store_Z l1 n1 /\ list_store_Z l2 n2). {
+    unfold list_store_Z.
+    tauto.
+  }
+  clear H0 H1 H4 H5.
+  destruct H6.
+  assert (l2 <> []). {
+    pose proof (Zlength_nonneg l1).
+    assert (Zlength l2 >= 1). { lia. }
+    destruct l2.
+    + rewrite Zlength_nil in H5.
+      lia.
+    + pose proof (@nil_cons Z z l2).
+      auto.
+  }
+  pose proof (list_store_Z_bound l2 n2 H1) as Hn2.
+  pose proof (@app_removelast_last Z l2 0 H4).
+  rewrite H5 in H1.
+  apply list_store_Z_split in H1; destruct H1.
+  rewrite (Aux.Zlength_removelast l2) in H1, H6; try auto.
+  remember (Zlength l2 - 1) as n eqn:Hn.
+  unfold list_store_Z in H6; destruct H6.
+  simpl in H6.
+  assert (n2 >= UINT_MOD ^ n). {
+    assert (n2 / UINT_MOD ^ n >= 1). { lia. }
+    pose proof (Zmult_ge_compat_r (n2 / UINT_MOD ^ n) 1 (UINT_MOD ^ n) ltac:(lia) ltac:(lia)).
+    rewrite Z.mul_1_l in H9.
+    assert (n2 >= n2 / UINT_MOD ^ n * UINT_MOD ^ n). {
+      assert (n >= 0). { 
+        destruct l2.
+        + contradiction.
+        + rewrite Zlength_cons in Hn; unfold Z.succ in Hn.
+          pose proof (Zlength_nonneg l2).
+          lia.
+      }
+      pose proof (Zmod_eq n2 (UINT_MOD ^ n) ltac:(lia)).
+      assert (n2 mod UINT_MOD ^ n >= 0). {
+        pose proof (Z.mod_bound_pos n2 (UINT_MOD ^ n) ltac:(lia) ltac:(lia)).
+        lia.
+      }
+      lia.
+    }
+    lia.
+  }
+  assert (Zlength l1 <= n). { lia. }
+  pose proof (list_store_Z_bound l1 n1 H0).
+  assert (UINT_MOD ^ n >= UINT_MOD ^ (Zlength l1)). {
+    assert (Zlength l1 = n \/ Zlength l1 < n). { lia. }
+    destruct H11.
+    + rewrite H11.
+      lia.
+    + assert (n >= 0). { 
+        destruct l2.
+        + contradiction.
+        + rewrite Zlength_cons in Hn; unfold Z.succ in Hn.
+          pose proof (Zlength_nonneg l2).
+          lia.
+      }
+      pose proof (Z.pow_lt_mono_r_iff UINT_MOD (Zlength l1) n ltac:(lia) ltac:(lia)).
+      destruct H13 as [H13 _].
+      specialize (H13 H11).
+      lia.
+  }
+  lia.
+Qed.
+
 End Internal.
 
 Record bigint_ent: Type := {
diff --git a/projects/lib/gmp_goal.v b/projects/lib/gmp_goal.v
index 0b3e985..39ce9b4 100644
--- a/projects/lib/gmp_goal.v
+++ b/projects/lib/gmp_goal.v
@@ -595,11 +595,11 @@ forall (cap2: Z) (l': (@list Z)) (l: (@list Z)) (i: Z) (n: Z) (d: Z) ,
 
 Definition mpn_cmp_safety_wit_1 := 
 forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) (l2: (@list Z)) (l1: (@list Z)) ,
-  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -620,16 +620,16 @@ Definition mpn_cmp_safety_wit_2 :=
 forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) (l2: (@list Z)) (l1: (@list Z)) (n: Z) ,
   [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -653,16 +653,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   &&  [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -685,16 +685,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   &&  [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -718,16 +718,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   &&  [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -750,16 +750,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   &&  [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -781,16 +781,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   [| (n < 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -809,11 +809,11 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
 
 Definition mpn_cmp_entail_wit_1 := 
 forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) (l2: (@list Z)) (l1: (@list Z)) ,
-  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -825,16 +825,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
 |--
   [| ((-1) <= (n_pre - 1 )) |] 
   &&  [| ((n_pre - 1 ) < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist (((n_pre - 1 ) + 1 )) (n_pre) (l1)) = (sublist (((n_pre - 1 ) + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -851,16 +851,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   &&  [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -872,16 +872,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
 |--
   [| ((-1) <= (n - 1 )) |] 
   &&  [| ((n - 1 ) < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist (((n - 1 ) + 1 )) (n_pre) (l1)) = (sublist (((n - 1 ) + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -899,16 +899,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   &&  [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -920,18 +920,18 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
 |--
   ([| (val1 < val2) |] 
   &&  [| ((-1) = (-1)) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
   ||
   ([| (val1 = val2) |] 
   &&  [| ((-1) = 0) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
   ||
   ([| (val1 > val2) |] 
   &&  [| ((-1) = 1) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
 .
 
 Definition mpn_cmp_return_wit_1_2 := 
@@ -941,16 +941,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   &&  [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -962,18 +962,18 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
 |--
   ([| (val1 < val2) |] 
   &&  [| (1 = (-1)) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
   ||
   ([| (val1 = val2) |] 
   &&  [| (1 = 0) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
   ||
   ([| (val1 > val2) |] 
   &&  [| (1 = 1) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
 .
 
 Definition mpn_cmp_return_wit_2 := 
@@ -981,16 +981,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   [| (n < 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -1002,37 +1002,37 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
 |--
   ([| (val1 < val2) |] 
   &&  [| (0 = (-1)) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
   ||
   ([| (val1 = val2) |] 
   &&  [| (0 = 0) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
   ||
   ([| (val1 > val2) |] 
   &&  [| (0 = 1) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 ))
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 ))
 .
 
 Definition mpn_cmp_partial_solve_wit_1 := 
 forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
-  [| (0 < n_pre) |] 
+  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
   &&  [| (cap2 <= 100000000) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 )
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 )
 |--
-  [| (0 < n_pre) |] 
+  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
   &&  [| (cap2 <= 100000000) |]
-  &&  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 )
+  &&  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 )
 .
 
 Definition mpn_cmp_partial_solve_wit_2 := 
@@ -1040,16 +1040,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -1062,16 +1062,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -1088,16 +1088,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -1110,16 +1110,16 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   [| (n >= 0) |] 
   &&  [| ((-1) <= n) |] 
   &&  [| (n < n_pre) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
   &&  [| ((sublist ((n + 1 )) (n_pre) (l1)) = (sublist ((n + 1 )) (n_pre) (l2))) |] 
-  &&  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  &&  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |] 
-  &&  [| (0 < n_pre) |] 
+  &&  [| (0 <= n_pre) |] 
   &&  [| (n_pre <= cap1) |] 
   &&  [| (n_pre <= cap2) |] 
   &&  [| (cap1 <= 100000000) |] 
@@ -1133,12 +1133,12 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
 
 Definition mpn_cmp_which_implies_wit_1 := 
 forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
-  (mpd_store_Z ap_pre val1 n_pre cap1 )
-  **  (mpd_store_Z bp_pre val2 n_pre cap2 )
+  (mpd_store_Z_compact ap_pre val1 n_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 n_pre cap2 )
 |--
   EX (l2: (@list Z))  (l1: (@list Z)) ,
-  [| (list_store_Z l1 val1 ) |] 
-  &&  [| (list_store_Z l2 val2 ) |] 
+  [| (list_store_Z_compact l1 val1 ) |] 
+  &&  [| (list_store_Z_compact l2 val2 ) |] 
   &&  [| (n_pre = (Zlength (l1))) |] 
   &&  [| (n_pre = (Zlength (l2))) |]
   &&  (store_uint_array ap_pre n_pre l1 )
@@ -1147,6 +1147,334 @@ forall (n_pre: Z) (bp_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z
   **  (store_undef_uint_array_rec bp_pre (n_pre + 1 ) cap2 )
 .
 
+(*----- Function mpn_cmp4 -----*)
+
+Definition mpn_cmp4_safety_wit_1 := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre >= bn_pre) |] 
+  &&  [| (an_pre <> bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  ((( &( "bn" ) )) # Int  |-> bn_pre)
+  **  ((( &( "bp" ) )) # Ptr  |-> bp_pre)
+  **  ((( &( "an" ) )) # Int  |-> an_pre)
+  **  ((( &( "ap" ) )) # Ptr  |-> ap_pre)
+  **  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  [| (1 <= INT_MAX) |] 
+  &&  [| ((INT_MIN) <= 1) |]
+.
+
+Definition mpn_cmp4_safety_wit_2 := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre < bn_pre) |] 
+  &&  [| (an_pre <> bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  ((( &( "bn" ) )) # Int  |-> bn_pre)
+  **  ((( &( "bp" ) )) # Ptr  |-> bp_pre)
+  **  ((( &( "an" ) )) # Int  |-> an_pre)
+  **  ((( &( "ap" ) )) # Ptr  |-> ap_pre)
+  **  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  [| (1 <> (INT_MIN)) |]
+.
+
+Definition mpn_cmp4_safety_wit_3 := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre < bn_pre) |] 
+  &&  [| (an_pre <> bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  ((( &( "bn" ) )) # Int  |-> bn_pre)
+  **  ((( &( "bp" ) )) # Ptr  |-> bp_pre)
+  **  ((( &( "an" ) )) # Int  |-> an_pre)
+  **  ((( &( "ap" ) )) # Ptr  |-> ap_pre)
+  **  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  [| (1 <= INT_MAX) |] 
+  &&  [| ((INT_MIN) <= 1) |]
+.
+
+Definition mpn_cmp4_return_wit_1_1 := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre >= bn_pre) |] 
+  &&  [| (an_pre <> bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  ([| (val1 < val2) |] 
+  &&  [| (1 = (-1)) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 = val2) |] 
+  &&  [| (1 = 0) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 > val2) |] 
+  &&  [| (1 = 1) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+.
+
+Definition mpn_cmp4_return_wit_1_2 := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre < bn_pre) |] 
+  &&  [| (an_pre <> bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  ([| (val1 < val2) |] 
+  &&  [| ((-1) = (-1)) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 = val2) |] 
+  &&  [| ((-1) = 0) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 > val2) |] 
+  &&  [| ((-1) = 1) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+.
+
+Definition mpn_cmp4_return_wit_2_1 := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) (retval: Z) ,
+  [| (val1 > val2) |] 
+  &&  [| (retval = 1) |] 
+  &&  [| (an_pre <= cap2) |] 
+  &&  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 an_pre cap2 )
+|--
+  ([| (val1 < val2) |] 
+  &&  [| (retval = (-1)) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 = val2) |] 
+  &&  [| (retval = 0) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 > val2) |] 
+  &&  [| (retval = 1) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+.
+
+Definition mpn_cmp4_return_wit_2_2 := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) (retval: Z) ,
+  [| (val1 = val2) |] 
+  &&  [| (retval = 0) |] 
+  &&  [| (an_pre <= cap2) |] 
+  &&  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 an_pre cap2 )
+|--
+  ([| (val1 < val2) |] 
+  &&  [| (retval = (-1)) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 = val2) |] 
+  &&  [| (retval = 0) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 > val2) |] 
+  &&  [| (retval = 1) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+.
+
+Definition mpn_cmp4_return_wit_2_3 := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) (retval: Z) ,
+  [| (val1 < val2) |] 
+  &&  [| (retval = (-1)) |] 
+  &&  [| (an_pre <= cap2) |] 
+  &&  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 an_pre cap2 )
+|--
+  ([| (val1 < val2) |] 
+  &&  [| (retval = (-1)) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 = val2) |] 
+  &&  [| (retval = 0) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+  ||
+  ([| (val1 > val2) |] 
+  &&  [| (retval = 1) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 ))
+.
+
+Definition mpn_cmp4_partial_solve_wit_1_pure := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  ((( &( "bn" ) )) # Int  |-> bn_pre)
+  **  ((( &( "bp" ) )) # Ptr  |-> bp_pre)
+  **  ((( &( "an" ) )) # Int  |-> an_pre)
+  **  ((( &( "ap" ) )) # Ptr  |-> ap_pre)
+  **  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  [| (an_pre = bn_pre) |] 
+  &&  [| (bn_pre <= cap2) |]
+.
+
+Definition mpn_cmp4_partial_solve_wit_1_aux := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  [| (an_pre = bn_pre) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+.
+
+Definition mpn_cmp4_partial_solve_wit_1 := mpn_cmp4_partial_solve_wit_1_pure -> mpn_cmp4_partial_solve_wit_1_aux.
+
+Definition mpn_cmp4_partial_solve_wit_2_pure := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre <= cap2) |] 
+  &&  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  ((( &( "bn" ) )) # Int  |-> bn_pre)
+  **  ((( &( "bp" ) )) # Ptr  |-> bp_pre)
+  **  ((( &( "an" ) )) # Int  |-> an_pre)
+  **  ((( &( "ap" ) )) # Ptr  |-> ap_pre)
+  **  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  [| (0 <= an_pre) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (an_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+.
+
+Definition mpn_cmp4_partial_solve_wit_2_aux := 
+forall (bn_pre: Z) (bp_pre: Z) (an_pre: Z) (ap_pre: Z) (val2: Z) (val1: Z) (cap2: Z) (cap1: Z) ,
+  [| (an_pre <= cap2) |] 
+  &&  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 bn_pre cap2 )
+|--
+  [| (0 <= an_pre) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (an_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |] 
+  &&  [| (an_pre <= cap2) |] 
+  &&  [| (an_pre = bn_pre) |] 
+  &&  [| (an_pre >= 0) |] 
+  &&  [| (bn_pre >= 0) |] 
+  &&  [| (an_pre <= cap1) |] 
+  &&  [| (bn_pre <= cap2) |] 
+  &&  [| (cap1 <= 100000000) |] 
+  &&  [| (cap2 <= 100000000) |]
+  &&  (mpd_store_Z_compact ap_pre val1 an_pre cap1 )
+  **  (mpd_store_Z_compact bp_pre val2 an_pre cap2 )
+.
+
+Definition mpn_cmp4_partial_solve_wit_2 := mpn_cmp4_partial_solve_wit_2_pure -> mpn_cmp4_partial_solve_wit_2_aux.
+
+Definition mpn_cmp4_which_implies_wit_1 := 
+forall (bn_pre: Z) (an_pre: Z) (cap2: Z) ,
+  [| (an_pre = bn_pre) |] 
+  &&  [| (bn_pre <= cap2) |]
+  &&  emp
+|--
+  [| (an_pre <= cap2) |]
+  &&  emp
+.
+
 Module Type VC_Correct.
 
 Axiom proof_of_gmp_abs_safety_wit_1 : gmp_abs_safety_wit_1.
@@ -1192,5 +1520,18 @@ Axiom proof_of_mpn_cmp_partial_solve_wit_1 : mpn_cmp_partial_solve_wit_1.
 Axiom proof_of_mpn_cmp_partial_solve_wit_2 : mpn_cmp_partial_solve_wit_2.
 Axiom proof_of_mpn_cmp_partial_solve_wit_3 : mpn_cmp_partial_solve_wit_3.
 Axiom proof_of_mpn_cmp_which_implies_wit_1 : mpn_cmp_which_implies_wit_1.
+Axiom proof_of_mpn_cmp4_safety_wit_1 : mpn_cmp4_safety_wit_1.
+Axiom proof_of_mpn_cmp4_safety_wit_2 : mpn_cmp4_safety_wit_2.
+Axiom proof_of_mpn_cmp4_safety_wit_3 : mpn_cmp4_safety_wit_3.
+Axiom proof_of_mpn_cmp4_return_wit_1_1 : mpn_cmp4_return_wit_1_1.
+Axiom proof_of_mpn_cmp4_return_wit_1_2 : mpn_cmp4_return_wit_1_2.
+Axiom proof_of_mpn_cmp4_return_wit_2_1 : mpn_cmp4_return_wit_2_1.
+Axiom proof_of_mpn_cmp4_return_wit_2_2 : mpn_cmp4_return_wit_2_2.
+Axiom proof_of_mpn_cmp4_return_wit_2_3 : mpn_cmp4_return_wit_2_3.
+Axiom proof_of_mpn_cmp4_partial_solve_wit_1_pure : mpn_cmp4_partial_solve_wit_1_pure.
+Axiom proof_of_mpn_cmp4_partial_solve_wit_1 : mpn_cmp4_partial_solve_wit_1.
+Axiom proof_of_mpn_cmp4_partial_solve_wit_2_pure : mpn_cmp4_partial_solve_wit_2_pure.
+Axiom proof_of_mpn_cmp4_partial_solve_wit_2 : mpn_cmp4_partial_solve_wit_2.
+Axiom proof_of_mpn_cmp4_which_implies_wit_1 : mpn_cmp4_which_implies_wit_1.
 
 End VC_Correct.
diff --git a/projects/lib/gmp_proof_auto.v b/projects/lib/gmp_proof_auto.v
index 300c3f1..92895cf 100644
--- a/projects/lib/gmp_proof_auto.v
+++ b/projects/lib/gmp_proof_auto.v
@@ -93,3 +93,27 @@ Proof. Admitted.
 Lemma proof_of_mpn_cmp_partial_solve_wit_3 : mpn_cmp_partial_solve_wit_3.
 Proof. Admitted. 
 
+Lemma proof_of_mpn_cmp4_safety_wit_1 : mpn_cmp4_safety_wit_1.
+Proof. Admitted. 
+
+Lemma proof_of_mpn_cmp4_safety_wit_2 : mpn_cmp4_safety_wit_2.
+Proof. Admitted. 
+
+Lemma proof_of_mpn_cmp4_safety_wit_3 : mpn_cmp4_safety_wit_3.
+Proof. Admitted. 
+
+Lemma proof_of_mpn_cmp4_partial_solve_wit_1_pure : mpn_cmp4_partial_solve_wit_1_pure.
+Proof. Admitted. 
+
+Lemma proof_of_mpn_cmp4_partial_solve_wit_1 : mpn_cmp4_partial_solve_wit_1.
+Proof. Admitted. 
+
+Lemma proof_of_mpn_cmp4_partial_solve_wit_2_pure : mpn_cmp4_partial_solve_wit_2_pure.
+Proof. Admitted. 
+
+Lemma proof_of_mpn_cmp4_partial_solve_wit_2 : mpn_cmp4_partial_solve_wit_2.
+Proof. Admitted. 
+
+Lemma proof_of_mpn_cmp4_which_implies_wit_1 : mpn_cmp4_which_implies_wit_1.
+Proof. Admitted. 
+
diff --git a/projects/lib/gmp_proof_manual.v b/projects/lib/gmp_proof_manual.v
index 5278efd..2f1ddf3 100644
--- a/projects/lib/gmp_proof_manual.v
+++ b/projects/lib/gmp_proof_manual.v
@@ -198,9 +198,9 @@ Lemma proof_of_mpn_cmp_return_wit_1_1 : mpn_cmp_return_wit_1_1.
 Proof.
   pre_process.
   entailer!.
-  repeat rewrite <-derivable1_orp_intros1.
+  Left; Left.
   entailer!.
-  + unfold mpd_store_Z.
+  + unfold mpd_store_Z_compact.
     Exists l1 l2.
     unfold mpd_store_list.
     entailer!.
@@ -208,7 +208,7 @@ Proof.
     entailer!.
   + assert (Znth n l1 0 < Znth n l2 0). { lia. }
     clear H H0.
-    apply (list_store_Z_cmp l1 l2 val1 val2 n ltac:(lia) ltac:(lia) H4 H5).
+    apply (list_store_Z_compact_cmp l1 l2 val1 val2 n ltac:(lia) ltac:(lia) H4 H5).
     - rewrite <-H6, <-H7.
       tauto.
     - lia.
@@ -217,13 +217,13 @@ Qed.
 Lemma proof_of_mpn_cmp_return_wit_1_2 : mpn_cmp_return_wit_1_2.
 Proof.
   pre_process.
-  rewrite <-derivable1_orp_intros2.
+  Right.
   entailer!.
-  + unfold mpd_store_Z, mpd_store_list.
+  + unfold mpd_store_Z_compact, mpd_store_list.
     Exists l1 l2.
     rewrite <-H6, <-H7.
     entailer!.
-  + pose proof (list_store_Z_cmp l2 l1 val2 val1 n ltac:(lia) ltac:(lia) H5 H4).
+  + pose proof (list_store_Z_compact_cmp l2 l1 val2 val1 n ltac:(lia) ltac:(lia) H5 H4).
     rewrite <-H6, <-H7 in H18.
     rewrite H8 in H18.
     specialize (H18 ltac:(reflexivity) ltac:(lia)).
@@ -233,11 +233,67 @@ Qed.
 Lemma proof_of_mpn_cmp_which_implies_wit_1 : mpn_cmp_which_implies_wit_1.
 Proof.
   pre_process.
-  unfold mpd_store_Z.
+  unfold mpd_store_Z_compact.
   Intros l1 l2.
   Exists l2 l1.
   unfold mpd_store_list.
   entailer!.
-  rewrite <-H4, <-H6.
+  rewrite <-H0, <-H2.
+  entailer!.
+Qed.
+
+Lemma proof_of_mpn_cmp4_return_wit_1_1 : mpn_cmp4_return_wit_1_1.
+Proof.
+  pre_process.
+  Right.
+  unfold mpd_store_Z_compact.
+  Intros l1 l2.
+  Exists l1 l2.
+  entailer!.
+  pose proof (list_store_Z_cmp_length l2 l1 val2 val1 ltac:(lia) H9 H7).
+  lia.
+Qed.
+
+Lemma proof_of_mpn_cmp4_return_wit_1_2 : mpn_cmp4_return_wit_1_2.
+Proof.
+  pre_process.
+  Left; Left.
+  unfold mpd_store_Z_compact.
+  entailer!.
+  Intros l1 l2.
+  Exists l1 l2.
+  entailer!.
+  pose proof (list_store_Z_cmp_length l1 l2 val1 val2 ltac:(lia) H7 H9).
+  lia.
+Qed.
+
+Lemma proof_of_mpn_cmp4_return_wit_2_1 : mpn_cmp4_return_wit_2_1.
+Proof.
+  pre_process.
+  Right.
+  unfold mpd_store_Z_compact.
+  Intros l1 l2.
+  Exists l1 l2.
+  entailer!.
+Qed.
+    
+
+Lemma proof_of_mpn_cmp4_return_wit_2_2 : mpn_cmp4_return_wit_2_2.
+Proof.
+  pre_process.
+  Left; Right.
+  unfold mpd_store_Z_compact.
+  Intros l1 l2.
+  Exists l1 l2.
+  entailer!.
+Qed.
+
+Lemma proof_of_mpn_cmp4_return_wit_2_3 : mpn_cmp4_return_wit_2_3.
+Proof.
+  pre_process.
+  Left; Left.
+  unfold mpd_store_Z_compact.
+  Intros l1 l2.
+  Exists l1 l2.
   entailer!.
 Qed.
\ No newline at end of file
diff --git a/projects/mini-gmp.c b/projects/mini-gmp.c
index 1f69d74..96859ec 100755
--- a/projects/mini-gmp.c
+++ b/projects/mini-gmp.c
@@ -102,26 +102,26 @@ mpn_cmp (unsigned int *ap, unsigned int *bp, int n)
 /*@
   With cap1 cap2 val1 val2
   Require
-    mpd_store_Z(ap, val1, n, cap1) *
-    mpd_store_Z(bp, val2, n, cap2) &&
-    0 < n && n <= cap1 && n <= cap2 && 
+    mpd_store_Z_compact(ap, val1, n, cap1) *
+    mpd_store_Z_compact(bp, val2, n, cap2) &&
+    0 <= n && n <= cap1 && n <= cap2 && 
     cap1 <= 100000000 && cap2 <= 100000000
   Ensure
     (val1 > val2 && __return == 1 ||
     val1 == val2 && __return == 0 ||
     val1 < val2 && __return == -1) &&
-    mpd_store_Z(ap@pre, val1, n@pre, cap1) *
-    mpd_store_Z(bp@pre, val2, n@pre, cap2)
+    mpd_store_Z_compact(ap@pre, val1, n@pre, cap1) *
+    mpd_store_Z_compact(bp@pre, val2, n@pre, cap2)
 */
 {
   /*@
-    mpd_store_Z(ap@pre, val1, n@pre, cap1) * mpd_store_Z(bp@pre, val2, n@pre, cap2)
+    mpd_store_Z_compact(ap@pre, val1, n@pre, cap1) * mpd_store_Z_compact(bp@pre, val2, n@pre, cap2)
     which implies
     exists l1 l2,
     store_uint_array(ap@pre, n@pre, l1) * store_uint_array(bp@pre, n@pre, l2) *
     store_undef_uint_array_rec(ap@pre, n@pre + 1, cap1) * 
     store_undef_uint_array_rec(bp@pre, n@pre + 1, cap2) &&
-    list_store_Z(l1, val1) && list_store_Z(l2, val2) &&
+    list_store_Z_compact(l1, val1) && list_store_Z_compact(l2, val2) &&
     n@pre == Zlength(l1) && n@pre == Zlength(l2)
   */
   /*@
@@ -133,7 +133,7 @@ mpn_cmp (unsigned int *ap, unsigned int *bp, int n)
     store_uint_array(ap@pre, n@pre, l1) * store_uint_array(bp@pre, n@pre, l2) *
     store_undef_uint_array_rec(ap@pre, n@pre + 1, cap1) * 
     store_undef_uint_array_rec(bp@pre, n@pre + 1, cap2) &&
-    list_store_Z(l1, val1) && list_store_Z(l2, val2) &&
+    list_store_Z_compact(l1, val1) && list_store_Z_compact(l2, val2) &&
     n@pre == Zlength(l1) && n@pre == Zlength(l2) &&
     sublist(n + 1, n@pre, l1) == sublist(n + 1, n@pre, l2)
   */
@@ -157,24 +157,45 @@ mpn_cmp (unsigned int *ap, unsigned int *bp, int n)
 /*处理位数不同的情况*/
 static int
 mpn_cmp4 (unsigned int *ap, int an, unsigned int *bp, int bn)
+/*@
+  With cap1 cap2 val1 val2
+  Require
+    mpd_store_Z_compact(ap, val1, an, cap1) *
+    mpd_store_Z_compact(bp, val2, bn, cap2) &&
+    an >= 0 && bn >= 0 && an <= cap1 && bn <= cap2 &&
+    cap1 <= 100000000 && cap2 <= 100000000
+  Ensure
+    (val1 > val2 && __return == 1 ||
+    val1 == val2 && __return == 0 ||
+    val1 < val2 && __return == -1) &&
+    mpd_store_Z_compact(ap@pre, val1, an@pre, cap1) *
+    mpd_store_Z_compact(bp@pre, val2, bn@pre, cap2)
+*/
 {
   if (an != bn)
     return an < bn ? -1 : 1;
-  else
+  else {
+    /*@
+      an@pre == bn@pre && bn@pre <= cap2
+      which implies
+      an@pre <= cap2
+    */
     return mpn_cmp (ap, bp, an);
+  }
 }
 
+
 /*返回非0的位数*/
-static int
+/*static int
 mpn_normalized_size (unsigned int *xp, int n)
 {
   while (n > 0 && xp[n-1] == 0)
     --n;
   return n;
-}
+}*/
 
 /* 多精度数ap 加上单精度数b，返回最后产生的进位 */
-unsigned int
+/*unsigned int
 mpn_add_1 (unsigned int *rp, unsigned int *ap, int n, unsigned int b)
 {
   int i;
@@ -183,17 +204,17 @@ mpn_add_1 (unsigned int *rp, unsigned int *ap, int n, unsigned int b)
   do
     {
       unsigned int r = ap[i] + b;
-      /* Carry out */
+      // Carry out
       b = (r < b);
       rp[i] = r;
     }
   while (++i < n);
 
   return b;
-}
+}*/
 
 /* 位数相同的多精度数ap 加上多精度数bp，返回最后产生的进位 */
-unsigned int
+/*unsigned int
 mpn_add_n (unsigned int *rp, unsigned int *ap, unsigned int *bp, int n)
 {
   int i;
@@ -210,10 +231,10 @@ mpn_add_n (unsigned int *rp, unsigned int *ap, unsigned int *bp, int n)
       rp[i] = r;
     }
   return cy;
-}
+}*/
 
 /*不同位数的多精度数相加，返回最后的进位*/
-unsigned int
+/*unsigned int
 mpn_add (unsigned int *rp, unsigned int *ap, int an, unsigned int *bp, int bn)
 {
   unsigned int cy;
@@ -222,9 +243,9 @@ mpn_add (unsigned int *rp, unsigned int *ap, int an, unsigned int *bp, int bn)
   if (an > bn)
     cy = mpn_add_1 (rp + bn, ap + bn, an - bn, cy);
   return cy;
-}
+}*/
 
-unsigned int
+/*unsigned int
 mpn_sub_1 (unsigned int *rp, unsigned int *ap, int n, unsigned int b)
 {
   int i;
@@ -233,7 +254,7 @@ mpn_sub_1 (unsigned int *rp, unsigned int *ap, int n, unsigned int b)
   do
     {
       unsigned int a = ap[i];
-      /* Carry out */
+      // Carry out
       unsigned int cy = a < b;
       rp[i] = a - b;
       b = cy;
@@ -241,9 +262,9 @@ mpn_sub_1 (unsigned int *rp, unsigned int *ap, int n, unsigned int b)
   while (++i < n);
 
   return b;
-}
+}*/
 
-unsigned int
+/*unsigned int
 mpn_sub_n (unsigned int *rp, unsigned int *ap, unsigned int *bp, int n)
 {
   int i;
@@ -259,9 +280,9 @@ mpn_sub_n (unsigned int *rp, unsigned int *ap, unsigned int *bp, int n)
       rp[i] = a - b;
     }
   return cy;
-}
+}*/
 
-unsigned int
+/*unsigned int
 mpn_sub (unsigned int *rp, unsigned int *ap, int an, unsigned int *bp, int bn)
 {
   unsigned int cy;
@@ -270,18 +291,18 @@ mpn_sub (unsigned int *rp, unsigned int *ap, int an, unsigned int *bp, int bn)
   if (an > bn)
     cy = mpn_sub_1 (rp + bn, ap + bn, an - bn, cy);
   return cy;
-}
+}*/
 
 /* MPZ interface */
 
-void
+/*void
 mpz_clear (mpz_t r)
 {
   if (r->_mp_alloc)
     gmp_free_limbs (r->_mp_d, r->_mp_alloc);
-}
+}*/
 
-static unsigned int *
+/*static unsigned int *
 mpz_realloc (mpz_t r, int size)
 {
   size = gmp_max (size, 1);
@@ -296,31 +317,31 @@ mpz_realloc (mpz_t r, int size)
     r->_mp_size = 0;
 
   return r->_mp_d;
-}
+}*/
 
 /* Realloc for an mpz_t WHAT if it has less than NEEDED limbs.  */
-unsigned int *mrz_realloc_if(mpz_t z,int n) {
+/*unsigned int *mrz_realloc_if(mpz_t z,int n) {
   return n > z->_mp_alloc ? mpz_realloc(z, n) : z->_mp_d;
-}
+}*/
 
 /* MPZ comparisons and the like. */
-int
+/*int
 mpz_sgn (const mpz_t u)
 {
   return gmp_cmp (u->_mp_size, 0);
-}
+}*/
 
-void
+/*void
 mpz_swap (mpz_t u, mpz_t v)
 {
   int_swap (u->_mp_alloc, v->_mp_alloc);
   unsigned int *_swap(u->_mp_d, v->_mp_d);
   int_swap (u->_mp_size, v->_mp_size);
-}
+}*/
 
 /* MPZ addition and subtraction */
 
-static int
+/*static int
 mpz_abs_add (mpz_t r, const mpz_t a, const mpz_t b)
 {
   int an = gmp_abs (a->_mp_size);
@@ -340,9 +361,9 @@ mpz_abs_add (mpz_t r, const mpz_t a, const mpz_t b)
   rp[an] = cy;
 
   return an + cy;
-}
+}*/
 
-static int
+/*static int
 mpz_abs_sub (mpz_t r, const mpz_t a, const mpz_t b)
 {
   int an = gmp_abs (a->_mp_size);
@@ -365,9 +386,9 @@ mpz_abs_sub (mpz_t r, const mpz_t a, const mpz_t b)
     }
   else
     return 0;
-}
+}*/
 
-void
+/*void
 mpz_add (mpz_t r, const mpz_t a, const mpz_t b)
 {
   int rn;
@@ -378,9 +399,9 @@ mpz_add (mpz_t r, const mpz_t a, const mpz_t b)
     rn = mpz_abs_sub (r, a, b);
 
   r->_mp_size = a->_mp_size >= 0 ? rn : - rn;
-}
+}*/
 
-void
+/*void
 mpz_sub (mpz_t r, const mpz_t a, const mpz_t b)
 {
   int rn;
@@ -391,4 +412,4 @@ mpz_sub (mpz_t r, const mpz_t a, const mpz_t b)
     rn = mpz_abs_add (r, a, b);
 
   r->_mp_size = a->_mp_size >= 0 ? rn : - rn;
-}
+}*/
diff --git a/projects/mini-gmp.h b/projects/mini-gmp.h
index b5a22b5..2c952b8 100755
--- a/projects/mini-gmp.h
+++ b/projects/mini-gmp.h
@@ -62,6 +62,9 @@ void mpz_set (mpz_t, const mpz_t);
   Extern Coq (Zabs : Z -> Z) 
              (Zmax : Z -> Z -> Z)
              (mpd_store_Z : Z -> Z -> Z -> Z -> Assertion)
+             (mpd_store_Z_compact: Z -> Z -> Z -> Z -> Assertion)
              (mpd_store_list : Z -> list Z -> Z -> Assertion)
              (list_store_Z : list Z -> Z -> Prop)
+             (list_store_Z_compact: list Z -> Z -> Prop)
+             (last: list Z -> Z -> Z)
 */
\ No newline at end of file