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Proof step 59 from proof inv-create-volume (previous step)

# apebs = # wlar, # apebs0 = # wlar2, # buf0 = LEB_SIZE, wlar2[vtblpnum] = wl-entry(m, free), apebs0[vtblpnum] = mkpeb(aehdr, empty, mkempbuf(LEB_SIZE), 0, false), q0 = [], vols0 = vols, aehdr.valid?, vtblpnum < # wlar2, bflipset-cons(bflipset, wlar), bflipset-cons(bflipset, wlar2), id(apebs0, apebs, mapped-pebs(vols)), ubi-io-inv(apebs0), ubi-io-inv(apebs), unique-sqns(apebs), unique-sqns(apebs0), valid-ebatbl(apebs, wlar, vols, vtblpnum3), valid-ebatbl(apebs0, wlar2, vols, vtblpnum3), valid-eraseq(q), valid-eraseq(wlar, q), valid-eraseq(apebs, q), valid-eraseq(wlar2, []), valid-global-sqn(apebs, sqnum), valid-global-sqn(apebs0, sqnum), valid-vtbl(apebs, vols, wlar, vtblpnum3), valid-vtbl(apebs0, vols, wlar2, vtblpnum3), valid-wl(apebs, wlar), valid-wl(apebs0, wlar2), 2 * ENCODED_NAT_SIZE + (ENCODED_VOLID_SIZE + ENCODED_NAT_SIZE) * # vols + ENCODED_VOLID_SIZE ≤ LEB_SIZE, # to-vtbl(vols)[v, n] * (ENCODED_NAT_SIZE + ENCODED_VOLID_SIZE) + ENCODED_NAT_SIZE ≤ LEB_SIZE, err = ESUCCESS → is-encoded(to-vtbl(vols)[v, n], buf0), err = ESUCCESS ∨ ⌊err⌋ ⊦ ⟪skip⟫ ( # apebs0 = # wlar2 ∧ unique-sqns(apebs0) ∧ valid-global-sqn(apebs0, sqnum) ∧ valid-wl(apebs0, wlar2) ∧ valid-eraseq(q0) ∧ valid-eraseq(wlar2, q0) ∧ valid-eraseq(apebs0, q0) ∧ ¬ VTBL_VOLID ∈ vols ∧ bflipset-cons(bflipset, wlar2) ∧ valid-ebatbl(apebs0, wlar2, vols, vtblpnum3) ∧ valid-vtbl(apebs0, vols, wlar2, vtblpnum3) ∧ ubi-io-inv(apebs0) ∧ (err = ESUCCESS ∨ ⌊err⌋ ) ∧ id(apebs0, apebs, mapped-pebs(vols)) ∧ (err = ESUCCESS → ¬ v ∈ vols0 ∧ vols = vols0[v, fill(mkebatbl(n), unmapped)] ∧ q0.lebrefs ⊆ ∅ ++ (VTBL_VOLID × VTBL_LNUM)) ∧ (err ≠ ESUCCESS → q0.lebrefs ⊆ q.lebrefs ∧ vols = vols0)), err = ESUCCESS, v = VTBL_VOLID, vtblpnum3 = vtblpnum, v ∈ vols, VTBL_VOLID ∈ vols, vtblpnum3 ∈ q

Heuristic symbolic execution applied rule skip right

And closed the goal!

Rule argument

Additional information

Used simplifier rules: ⊦ ⌊err⌋ → err ≠ ESUCCESS; (s)% ⊦ valid-eraseq([]); (s)% ⊦ valid-eraseq(apebs, []); (s)% ⊦ [].lebrefs = ∅; (s)% ⊦ ∅ ⊆ s0; (s)