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Proof step 151 from proof delta-wear-leveling (previous step)

# wlar1 = # wlar, # apebs = # wlar, # apebs0 = # wlar, apebs[vtblpnum2] = mkpeb(aechdr(m0), avidhdr(v0, m3, valid-sqns(v, m, apebs).max, m5, m6), buf1, m2, false), wlar[vtblpnum1] = wl-entry(m4, free), wlar[vtblpnum2] = wl-entry(m0, used), vols[v][m] = ⌜vtblpnum2⌝ , ecs(wlar1) = ecs(wlar), err = ESUCCESS, Δ wlar1 = Δ wlar, m < # vols[v], vtblpnum1 < # wlar, vtblpnum2 < # wlar, bflipset-cons(bflipset0, wlar), bflipset-cons(bflipset, wlar1), id(apebs0, apebs, mapped-pebs(vols)), id○(apebs0, apebs, vtblpnum1), is-aligned(LEB_SIZE, EB_PAGE_SIZE), ubi-io-inv(apebs), ubi-io-inv(apebs0), ubi-io-peb-inv(mkpeb(aechdr(m0), avidhdr(v0, m3, valid-sqns(v, m, apebs).max, m5, m6), buf1, m2, false)), unique-sqns(apebs), unique-sqns(apebs0), valid-ebatbl(apebs0, wlar1, vols0, n0), valid-eraseq(apebs, q), valid-eraseq(wlar, q), valid-eraseq(q), valid-eraseq(apebs0, q0), valid-eraseq(wlar1, q0), valid-eraseq(q0), valid-global-sqn(apebs, n1), valid-global-sqn(apebs0, n), valid-peb(v, m, mkpeb(aechdr(m0), avidhdr(v0, m3, valid-sqns(v, m, apebs).max, m5, m6), buf1, m2, false)), valid-vtbl(apebs0, vols0, wlar1, n0), valid-vtbl(apebs, vols, wlar, n2), valid-wl(apebs0, wlar1), v ∈ vols, m0 + WL_THRESHOLD ≤ m4, err = ESUCCESS → vols0 = vols[v, vols[v][m, ⌜vtblpnum1⌝ ]], err ≠ ESUCCESS → vols0 = vols, err = ESUCCESS → wlar1[vtblpnum1].ec = m4 ∧ wlar1[vtblpnum2].ec = m0, err ≠ ESUCCESS → q0.lebrefs = q.lebrefs, err = ESUCCESS → apebs0[vtblpnum1].fill = align↑(datasize(apebs0[vtblpnum1].data, LEB_SIZE), EB_PAGE_SIZE) ∧ apebs0[vtblpnum1].data = buf1 ∧ q0.lebrefs ⊆ q.lebrefs ++ (v × m), err = ESUCCESS → q0 = q + eq-entry(vtblpnum2, v × m) ', err = ESUCCESS ∨ ⌊err⌋ ⊦ [skip; if err = ESUCCESS then {ubi_erase_worker_helper#(vtblpnum2; wlar1, apebs0; err); if err = ESUCCESS then q0 := q0.butlast}] ( # apebs0 = # wlar1 ∧ unique-sqns(apebs0) ∧ valid-global-sqn(apebs0, n) ∧ valid-wl(apebs0, wlar1) ∧ valid-eraseq(q0) ∧ valid-eraseq(wlar1, q0) ∧ valid-eraseq(apebs0, q0) ∧ bflipset-cons(bflipset, wlar1) ∧ valid-ebatbl(apebs0, wlar1, vols0, n0) ∧ valid-vtbl(apebs0, vols0, wlar1, n0) ∧ ubi-io-inv(apebs0) ∧ ( vols = vols0 ∧ id(apebs0, apebs, mapped-pebs(vols0)) ∧ q0.lebrefs ⊆ q.lebrefs ++ (VTBL_VOLID × VTBL_LNUM) ∨ (∃ v, m, n. v ∈ vols ∧ m < # vols[v] ∧ vols[v][m] ≠ unmapped ∧ vols0 = vols[v, vols[v][m, ⌜n⌝ ]] ∧ id(apebs0, apebs, mapped-pebs(vols) -- vols[v][m].pnum) ∧ apebs0[n].data = apebs[vols[v][m].pnum].data ∧ apebs0[n].fill ≤ apebs[vols[v][m].pnum].fill ∧ q0.lebrefs ⊆ q.lebrefs ++ (v × m))) → err = ESUCCESS → Δ wlar1 < Δ wlar), vtblpnum1 = vtblpnum2, vtblpnum2 = n2, VTBL_VOLID ∈ vols, VTBL_VOLID ∈ vols0

Heuristic symbolic execution applied rule skip right

And obtained the following new goals

Rule argument

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