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Proof step 75 from proof inv-wl-worker (previous step)

# apebs = # wlar, apebs[vtblpnum2] = mkpeb(aehdr1, avhdr, buf, m3, false), apebs[vtblpnum1] = mkpeb(aehdr, empty, mkempbuf(LEB_SIZE), 0, false), wlar[vtblpnum2] = wl-entry(m1, used), wlar[vtblpnum1] = wl-entry(m0, free), apebs0 = apebs, q0 = q, vols0 = vols, vtblpnum3 = vtblpnum4, vtblpnum4 ≠ vtblpnum1, aehdr.valid?, vtblpnum2 < # wlar, vtblpnum1 < # wlar, bflipset-cons(bflipset, wlar), bflipset-cons(bflipset0, wlar), is-aligned(LEB_SIZE, EB_PAGE_SIZE), ubi-io-inv(apebs), ubi-io-peb-inv(mkpeb(aehdr1, avhdr, buf, m3, false)), unique-sqns(apebs), valid-ebatbl(apebs, wlar, vols, vtblpnum4), valid-eraseq(q), valid-eraseq(wlar, q), valid-eraseq(apebs, q), valid-global-sqn(apebs, sqnum), valid-peb(mkpeb(aehdr1, avhdr, buf, m3, false)), valid-vtbl(apebs, vols, wlar, vtblpnum4), valid-wl(apebs, wlar), ¬ VTBL_VOLID ∈ vols, ¬ vtblpnum4 ∈ q, ¬ vtblpnum2 ∈ q, bflipset = ∅ → m1 + WL_THRESHOLD ≤ m0, avhdr.vol ∈ vols ∧ avhdr.leb < # vols[avhdr.vol] ∨ avhdr.vol = VTBL_VOLID ∧ avhdr.leb = VTBL_LNUM ⊦ [ubi_atomic_leb_change# (avhdr.vol, avhdr.leb, vtblpnum1, LEB_SIZE, copy(buf, 0, mkbuf(LEB_SIZE), 0, LEB_SIZE), EB_PAGE_SIZE ; vols, wlar, q, bflipset0, vtblpnum4, sqnum, apebs ; err0)] ( (err0 = ESUCCESS ∨ ⌊err0⌋ ) ∧ id○(apebs, apebs0, vtblpnum1) ∧ ubi-io-inv(apebs) ∧ # apebs = # wlar ∧ unique-sqns(apebs) ∧ valid-global-sqn(apebs, sqnum) ∧ valid-wl(apebs, wlar) ∧ valid-eraseq(q) ∧ valid-eraseq(wlar, q) ∧ valid-eraseq(apebs, q) ∧ ¬ VTBL_VOLID ∈ vols ∧ bflipset-cons(bflipset0, wlar) ∧ ( avhdr.vol ∈ vols0 ∨ is-encoded(to-vtbl(vols0), buf) ∨ err0 ≠ ESUCCESS → valid-ebatbl(apebs, wlar, vols, vtblpnum4) ∧ valid-vtbl(apebs, vols, wlar, vtblpnum4)) ∧ ( err0 = ESUCCESS ∧ avhdr.vol = VTBL_VOLID ∧ avhdr.leb = VTBL_LNUM → (∀ v, m. ¬ v ∈ vols0 ∧ is-encoded(to-vtbl(vols0)[v, m], buf) → valid-ebatbl(apebs, wlar, vols[v, fill(mkebatbl(m), unmapped)], vtblpnum4) ∧ valid-vtbl(apebs, vols[v, fill(mkebatbl(m), unmapped)], wlar, vtblpnum4))) ∧ ( err0 = ESUCCESS ∧ avhdr.vol ∈ vols0 ∧ vols0[avhdr.vol][avhdr.leb] ≠ unmapped → q = q0 + eq-entry(vols0[avhdr.vol][avhdr.leb].pnum, avhdr.vol × avhdr.leb) ') ∧ (err0 = ESUCCESS ∧ avhdr.vol = VTBL_VOLID ∧ avhdr.leb = VTBL_LNUM → q = q0 + eq-entry(vtblpnum3, avhdr.vol × avhdr.leb) ') ∧ id(apebs, apebs0, mapped-pebs(vols0)) ∧ (avhdr.vol = VTBL_VOLID ∧ avhdr.leb = VTBL_LNUM ∨ err0 ≠ ESUCCESS → vols = vols0) ∧ (avhdr.vol ∈ vols0 ∧ err0 = ESUCCESS → vols = vols0[avhdr.vol, vols0[avhdr.vol][avhdr.leb, ⌜vtblpnum1⌝ ]]) ∧ ( err0 = ESUCCESS → apebs[vtblpnum1].fill = align↑(datasize(apebs[vtblpnum1].data, LEB_SIZE), EB_PAGE_SIZE) ∧ apebs[vtblpnum1].data = buf ∧ q.lebrefs ⊆ q0.lebrefs ++ (avhdr.vol × avhdr.leb)) ∧ (err0 ≠ ESUCCESS → q.lebrefs = q0.lebrefs) → ⟪if err0 ≠ ESUCCESS then debug#("ubi: wear-leveling of PEB " + vtblpnum2.toString + " to PEB " + vtblpnum1.toString + " failed"); if err0 = ESUCCESS then {ubi_erase_worker_helper#(vtblpnum2; wlar, apebs; err0); if err0 = ESUCCESS then q := q.butlast}⟫ ( # apebs = # wlar ∧ unique-sqns(apebs) ∧ valid-global-sqn(apebs, sqnum) ∧ valid-wl(apebs, wlar) ∧ valid-eraseq(q) ∧ valid-eraseq(wlar, q) ∧ valid-eraseq(apebs, q) ∧ bflipset-cons(bflipset0, wlar) ∧ valid-ebatbl(apebs, wlar, vols, vtblpnum4) ∧ valid-vtbl(apebs, vols, wlar, vtblpnum4) ∧ ubi-io-inv(apebs) ∧ ( vols0 = vols ∧ id(apebs, apebs0, mapped-pebs(vols)) ∧ q.lebrefs ⊆ q0.lebrefs ++ (VTBL_VOLID × VTBL_LNUM) ∨ (∃ v, m, n. v ∈ vols0 ∧ m < # vols0[v] ∧ vols0[v][m] ≠ unmapped ∧ vols = vols0[v, vols0[v][m, ⌜n⌝ ]] ∧ id(apebs, apebs0, mapped-pebs(vols0) -- vols0[v][m].pnum) ∧ apebs[n].data = apebs0[vols0[v][m].pnum].data ∧ apebs[n].fill ≤ apebs0[vols0[v][m].pnum].fill ∧ q.lebrefs ⊆ q0.lebrefs ++ (v × m)))))

User applied rule skip call

And obtained the following new goals

Rule argument

pos: right 1

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