diff --git a/theories/c_translation/translation.v b/theories/c_translation/translation.v
index fcb7012e344970269d79cbfc7b85a7dd88a5c36c..d4663bc009e5b360f7e5ba6fcb09ec5ce2d99ea3 100644
--- a/theories/c_translation/translation.v
+++ b/theories/c_translation/translation.v
@@ -407,7 +407,7 @@ Section proofs.
 
   (* Internal spec: breaks the abstraction/notation *)
   Lemma cwp_seq_bind' R Φ e (f: val) :
-    CWP e @ R {{ v, U (CWP f v @ R {{ Φ }}) }} -∗
+    CWP e @ R {{ v, ▷ U (CWP f v @ R {{ Φ }}) }} -∗
     CWP c_seq_bind e f @ R {{ Φ }}.
   Proof.
     iIntros "H".
@@ -418,11 +418,11 @@ Section proofs.
   Qed.
 
   Lemma cwp_seq_bind R Φ x e1 e2 :
-    CWP e1 @ R {{ v, U (CWP subst' x v e2 @ R {{ Φ }}) }} -∗
+    CWP e1 @ R {{ v, ▷ U (CWP subst' x v e2 @ R {{ Φ }}) }} -∗
     CWP x ←ᶜ e1 ;ᶜ e2 @ R {{ Φ }}.
   Proof.
     iIntros "H". cwp_pures. iApply cwp_seq_bind'.
-    iApply (cwp_wand with "H"); iIntros (v) "H !>". by cwp_lam.
+    iApply (cwp_wand with "H"); iIntros (v) "H !> !>". by cwp_lam.
   Qed.
 
   (* Internal spec: breaks the abstraction/notation *)
@@ -434,7 +434,7 @@ Section proofs.
   Proof.
     iIntros "H".
     cwp_apply (cwp_wp with "H"); iIntros (ev) "H". cwp_lam. cwp_pures.
-    iApply cwp_seq_bind'; iApply (cwp_wand with "H"); iIntros (v) "H !>".
+    iApply cwp_seq_bind'; iApply (cwp_wand with "H"); iIntros (v) "H !> !>".
     cwp_pures. iApply cwp_bind.
     cwp_apply cwp_atomic_env; iIntros (env) "Henv $". iApply wp_fupd.
     iDestruct "Henv" as (X σ HX) "[Hlocks Hσ]". wp_pures.
@@ -480,7 +480,7 @@ Section proofs.
     iIntros "H". rewrite /c_if -lock. cwp_pures.
     cwp_apply (cwp_wp with "H"). iIntros (v) "H". cwp_pures.
     iApply cwp_seq_bind'. iApply (cwp_wand with "H").
-    iIntros (v') "[[-> ?] | [-> ?]] !>"; by cwp_pures.
+    iIntros (v') "[[-> ?] | [-> ?]] !> !>"; by cwp_pures.
   Qed.
 
   Lemma cwp_while R Φ c e :
@@ -498,9 +498,9 @@ Section proofs.
     iIntros "H". cwp_lam. cwp_pures. rewrite /c_if -lock. cwp_pures.
     cwp_apply (cwp_wp with "H"). iIntros (v) "H". cwp_lam. cwp_pures.
     iApply cwp_seq_bind'. iApply (cwp_wand with "H").
-    iIntros (v') "[[-> H] | [-> H]] !>".
+    iIntros (v') "[[-> H] | [-> H]] !> !>".
     - cwp_pures. iApply cwp_seq_bind'.
-      iApply (cwp_wand with "H"); iIntros (w) "H !>". by cwp_lam.
+      iApply (cwp_wand with "H"); iIntros (w) "H !> !>". by cwp_lam.
     - cwp_pures. iApply cwp_ret. by iApply wp_value.
   Qed.
 
@@ -532,7 +532,7 @@ Section proofs.
     CWP (λᶜ mx, e)%V v @ R {{ Φ }}.
   Proof.
     iIntros "H". cwp_lam. iApply cwp_seq_bind; simpl. cwp_lam.
-    iApply (cwp_wand with "H"); iIntros (w) "H !>".
+    iApply (cwp_wand with "H"); iIntros (w) "H !> !>".
     by iApply cwp_ret; iApply wp_value.
   Qed.
 
diff --git a/theories/tests/store_strong.v b/theories/tests/store_strong.v
new file mode 100644
index 0000000000000000000000000000000000000000..6a9ad9168aaefe8a99f61b0e8230a5dadbc551f0
--- /dev/null
+++ b/theories/tests/store_strong.v
@@ -0,0 +1,126 @@
+From stdpp Require Import namespaces.
+From iris_c.vcgen Require Import proofmode.
+From iris_c.lib Require Import mset list.
+From iris.algebra Require Import frac_auth csum excl agree.
+
+Definition storeme : val := λᶜ "l",
+  c_ret "l" =ᶜ ♯ 10 ;ᶜ ♯ 10.
+
+Definition lol : val := λᶜ "l",
+  callᶜ (c_ret storeme) (c_ret "l") +ᶜ (c_ret "l" =ᶜ ♯11).
+
+Section lol.
+  Context `{cmonadG Σ, !inG Σ (frac_authR natR)}.
+
+  Lemma cwp_store_hard R Φ Ψ1 Ψ2 e1 e2 :
+    CWP e1 @ R {{ Ψ1 }} -∗
+    CWP e2 @ R {{ Ψ2 }} -∗
+    (∀ v1 v2, Ψ1 v1 -∗ Ψ2 v2 -∗ R -∗ ∃ cl w,
+              ⌜ v1 = cloc_to_val cl ⌝ ∧ cl ↦C w ∗ (cl ↦C[LLvl] v2 ={⊤}=∗ R ∗ Φ v2)) -∗
+    CWP e1 =ᶜ e2 @ R {{ Φ }}.
+  Proof.
+    iIntros "H1 H2 HΦ".
+    cwp_apply (cwp_wp with "H2"); iIntros (v2) "H2".
+    cwp_apply (cwp_wp with "H1"); iIntros (v1) "H1".
+    Transparent c_store. unfold c_store.
+    cwp_lam. cwp_pures.
+    iApply cwp_bind. iApply (cwp_par with "H1 H2").
+    iIntros "!>" (w1 w2) "H1 H2 !>". cwp_pures.
+    iApply cwp_atomic_env.
+    iIntros (env). iDestruct 1 as (X σ HX) "[Hlocks Hσ]". iIntros "HR".
+    iDestruct ("HΦ" with "H1 H2 HR") as (cl w ->) "[Hl HΦ]".
+    iDestruct (full_locking_heap_unlocked with "Hl Hσ") as %Hw1.
+    iDestruct (mapsto_offset_non_neg with "Hl") as %?.
+    assert ((#(cloc_base cl), #(cloc_offset cl))%V ∉ X) as HclX.
+    { intros Hcl. destruct (HX _ Hcl) as (cl'&[=]%cloc_to_of_val&?). naive_solver. }
+    iMod (full_locking_heap_store_upd with "Hσ Hl") as (k ll vs Hl Hi) "[Hl Hclose]".
+    wp_pures. rewrite cloc_to_val_eq. wp_pures.
+    wp_apply (mset_add_spec with "[$]"); first done.
+    iIntros "Hlocks /="; wp_pures.
+    wp_load; wp_pures.
+    iEval (rewrite -(Z2Nat.id (cloc_offset cl)) //).
+    wp_apply (linsert_spec with "[//]"); [eauto|]. iIntros (ll' Hl').
+    iApply wp_fupd. wp_store.
+    iMod ("Hclose" $! _ LLvl with "[//] Hl") as "[Hσ Hl]".
+    iMod ("HΦ" with "Hl") as "[$ $]". iIntros "!> !>".
+    iExists ({[(#(cloc_base cl), #(cloc_offset cl))%V]} ∪ X), _.
+    iFrame "Hσ Hlocks". iPureIntro. rewrite locked_locs_lock. set_solver.
+   Qed.
+
+  Lemma storeme_spec R cl v Φ :
+    cl ↦C v -∗ (cl ↦C #10 -∗ Φ #10) -∗
+    CWP storeme (cloc_to_val cl) @ R {{ Φ }}.
+  Proof.
+    iIntros "? H". iApply cwp_fun; simpl. vcg; iIntros "? !>". by iApply "H".
+  Qed.
+
+  Definition oneshotR := csumR (exclR unitR) (agreeR natC).
+  Class oneshotG Σ := { oneshot_inG :> inG Σ oneshotR }.
+  Definition oneshotΣ : gFunctors := #[GFunctor oneshotR].
+  Instance subG_oneshotΣ {Σ} : subG oneshotΣ Σ → oneshotG Σ.
+  Proof. solve_inG. Qed.
+
+  Definition pending γ `{oneshotG Σ} := own γ (Cinl (Excl ())).
+  Definition shot γ n `{oneshotG Σ} := own γ (Cinr (to_agree n)).
+  Lemma new_pending `{oneshotG Σ} : (|==> ∃ γ, pending γ)%I.
+  Proof. by apply own_alloc. Qed.
+  Lemma shoot γ m `{oneshotG Σ} : pending γ ==∗ shot γ m.
+  Proof.
+    apply own_update.
+    intros n [f |]; simpl; eauto.
+    destruct f; simpl; try by inversion 1.
+  Qed.
+  Lemma shot_not_pending γ b `{oneshotG Σ} :
+    shot γ b -∗ pending γ -∗ False.
+  Proof.
+    iIntros "Hs Hp".
+    iPoseProof (own_valid_2 with "Hs Hp") as "H".
+    iDestruct "H" as %[].
+  Qed.
+
+  Lemma shot_agree γ m n `{oneshotG Σ} :
+    shot γ m -∗ shot γ n -∗ ⌜m = n⌝.
+  Proof.
+    iIntros "Hs Hs'".
+    iPoseProof (own_valid_2 with "Hs Hs'") as "H".
+    rewrite Cinr_op /=.
+    by iDestruct "H" as %LOL%agree_op_invL'.
+  Qed.
+
+  Lemma lol_spec R cl `{oneshotG Σ} :
+    cl ↦C #0%nat -∗
+    CWP lol (cloc_to_val cl) @ R {{ v, ⌜ v = #21 ⌝ ∧
+        (cl ↦C #10 ∨ cl ↦C #11) }}.
+  Proof.
+    iIntros "Hl". iApply cwp_fun.
+    iMod (own_alloc (●! 0%nat ⋅ ◯! 0%nat)) as (γ) "[Hγ [Hγ1 Hγ2]]"; [done|].
+    set (lol_inv := ((cl ↦C #0 ∗ own γ (●! 0%nat))
+                     ∨ (cl ↦C #10 ∗ own γ (●! 10%nat))
+                     ∨ (cl ↦C[LLvl] #11 ∗ own γ (●! 11%nat))
+                    )%I).
+    iApply (cwp_insert_res _ _ lol_inv with "[Hγ Hl]").
+    { iNext. iLeft. eauto with iFrame. }
+    simpl.
+    iApply (cwp_bin_op _ _ (λ v, ⌜v = #10⌝ ∗ own γ (◯!{1 / 2} 10%nat))%I
+                           (λ v, ⌜v = #11⌝ ∗ own γ (◯!{1 / 2} 11%nat))%I
+              with "[Hγ1] [Hγ2]").
+    - vcg. unfold lol_inv. iIntros "[H R]".
+      admit.
+    - iApply (cwp_store_hard _ _ (λ v, ⌜v = cloc_to_val cl⌝)%I
+                                 (λ v, ⌜v = #11⌝)%I).
+      1,2: vcg; eauto.
+      iIntros (? ? -> ->) "[H R]". unfold lol_inv.
+      iDestruct "H" as "[[Hcl H] | [[Hcl H] | [Hcl H]]]".
+      + iExists cl, _. iFrame. iSplit; first done.
+        iIntros "Hl". iMod (own_update_2 with "H Hγ2") as "[H Hγ2]".
+        { apply frac_auth_update.
+          apply (nat_local_update _ _ 11%nat 11%nat); lia. }
+        iModIntro. iFrame "Hγ2". iSplit; last done.
+        iRight. iRight. iFrame.
+      + iExists cl, _. iFrame. iSplit; first done.
+        iIntros "Hl". iMod (own_update_2 with "H Hγ2") as "[H Hγ2]".
+        { apply frac_auth_update.
+          apply (nat_local_update _ _ 11%nat 1%nat). lia. }
+        iModIntro. Abort.
+End lol.
+
diff --git a/theories/vcgen/forward.v b/theories/vcgen/forward.v
index a9afc224e5bd500c03bf93cba74e04759a2be2db..7a92b2c1ea1e5a55062268877dadf2ea5e9e50e6 100644
--- a/theories/vcgen/forward.v
+++ b/theories/vcgen/forward.v
@@ -212,7 +212,7 @@ Section forward_spec.
       iDestruct (denv_stack_interp_trans with "H1 H2") as "H".
       iApply (denv_stack_interp_wand with "H"); iIntros "[H1 H2]".
       iApply cwp_seq_bind. iApply (cwp_wand with "H1"); iIntros (v1) "[-> Hm]".
-      iDestruct (denv_unlock_interp with "Hm") as "Hm"; iModIntro.
+      iDestruct (denv_unlock_interp with "Hm") as "Hm"; do 2 iModIntro.
       iDestruct ("H2" with "Hm") as "[Hm2 H]". rewrite -dcexpr_interp_subst'.
       iApply (cwp_wand with "H"); iIntros (v2) "[-> Hm]".
       iSplit; first done. iApply (denv_merge_interp with "[$]"); eauto 10.
diff --git a/theories/vcgen/vcg.v b/theories/vcgen/vcg.v
index 414108f8fab84ff4dd316ffc6166dca30e53ef56..e3ca7fe5abdcd439cbc98044496a7f1e0d316e60 100644
--- a/theories/vcgen/vcg.v
+++ b/theories/vcgen/vcg.v
@@ -447,7 +447,7 @@ Section vcg_spec.
       iDestruct ("IH" with "[] [] Hm H") as "H"; eauto.
       iApply cwp_seq_bind. iApply (cwp_wand with "H").
       iIntros (v) "H"; iDestruct "H" as (E' dv m' -> ???) "[Hm H]".
-      iDestruct (denv_unlock_interp with "Hm") as "Hm"; iModIntro.
+      iDestruct (denv_unlock_interp with "Hm") as "Hm"; do 2 iModIntro.
       rewrite (dcexpr_interp_mono E E') // -dcexpr_interp_subst'.
       iDestruct ("IH" with "[] [] Hm H") as "H"; eauto using dcexpr_wf_mono.
       iApply (cwp_wand with "H"); iIntros (v) "H".