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Proof step 17 from proof inv-write (previous step)

# apebs = # wlar, vols[v][vtblpnum4] = ⌜m0⌝ , apebs[m0] = mkpeb(aehdr, avhdr, buf1, m, boolvar), wlar[m0] = wl-entry(m1, stat), stat = used, vtblpnum4 < # vols[v], m0 < # wlar, bflipset-cons(bflipset, wlar), is-aligned(n, EB_PAGE_SIZE), is-aligned(vtblpnum3, EB_PAGE_SIZE), ubi-io-inv(apebs), ubi-io-peb-inv(mkpeb(aehdr, avhdr, buf1, m, boolvar)), unique-sqns(apebs), valid-ebatbl(apebs, wlar, vols, vtblpnum), valid-eraseq(q), valid-eraseq(wlar, q), valid-eraseq(apebs, q), valid-global-sqn(apebs, sqnum), valid-peb(v, vtblpnum4, mkpeb(aehdr, avhdr, buf1, m, boolvar)), valid-vtbl(apebs, vols, wlar, vtblpnum), valid-wl(apebs, wlar), v ∈ vols, n0 + n ≤ # buf, vtblpnum3 + n ≤ LEB_SIZE, m ≤ vtblpnum3 ⊦ ⟪aubi_io_write_data#(m0, vtblpnum3, n0, n, buf; apebs; err); if err ≠ ESUCCESS then {debug#("ubi: failed to write to PEB " + m0.toString); let buf1 = mkbuf(vtblpnum3 + n), bitflips = ? in {aubi_io_read_data#(m0, 0, 0, vtblpnum3, apebs; buf1; bitflips, err); if err = ESUCCESS then {buf1 := copy(buf, n0, buf1, vtblpnum3, n); debug#("ubi: moving data from PEB " + m0.toString); ubi_change#(v, vtblpnum4, vtblpnum3 + n, buf1, EB_PAGE_SIZE; vols, wlar, q, bflipset, vtblpnum, sqnum, apebs; err)} else debug#("ubi: failed to read data from PEB " + m0.toString)}}⟫ ( # 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(bflipset, wlar) ∧ valid-ebatbl(apebs, wlar, vols, vtblpnum) ∧ valid-vtbl(apebs, vols, wlar, vtblpnum) ∧ ubi-io-inv(apebs)), m0 = vtblpnum, n = 0, VTBL_VOLID ∈ vols, vtblpnum ∈ q

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 18:
# apebs = # wlar, vols[v][vtblpnum4] = ⌜m0⌝ , apebs[m0] = mkpeb(aehdr, avhdr, buf1, m, false), wlar[m0] = wl-entry(m1, used), m0 ≠ vtblpnum, n ≠ 0, vtblpnum4 < # vols[v], m0 < # wlar, bflipset-cons(bflipset, wlar), is-aligned(n, EB_PAGE_SIZE), is-aligned(vtblpnum3, EB_PAGE_SIZE), ubi-io-inv(apebs), ubi-io-peb-inv(mkpeb(aehdr, avhdr, buf1, m, false)), unique-sqns(apebs), valid-ebatbl(apebs, wlar, vols, vtblpnum), valid-eraseq(q), valid-eraseq(wlar, q), valid-eraseq(apebs, q), valid-global-sqn(apebs, sqnum), valid-peb(v, vtblpnum4, mkpeb(aehdr, avhdr, buf1, m, false)), valid-peb(mkpeb(aehdr, avhdr, buf1, m, false)), valid-vtbl(apebs, vols, wlar, vtblpnum), valid-wl(apebs, wlar), v ∈ vols, n0 + n ≤ # buf, vtblpnum3 + n ≤ LEB_SIZE, m ≤ vtblpnum3, ¬ m0 ∈ q, ¬ VTBL_VOLID ∈ vols, ¬ vtblpnum ∈ q ⊦ ⟪aubi_io_write_data#(m0, vtblpnum3, n0, n, buf; apebs; err); if err ≠ ESUCCESS then {debug#("ubi: failed to write to PEB " + m0.toString); let buf1 = mkbuf(vtblpnum3 + n), bitflips = ? in {aubi_io_read_data#(m0, 0, 0, vtblpnum3, apebs; buf1; bitflips, err); if err = ESUCCESS then {buf1 := copy(buf, n0, buf1, vtblpnum3, n); debug#("ubi: moving data from PEB " + m0.toString); ubi_change#(v, vtblpnum4, vtblpnum3 + n, buf1, EB_PAGE_SIZE; vols, wlar, q, bflipset, vtblpnum, sqnum, apebs; err)} else debug#("ubi: failed to read data from PEB " + m0.toString)}}⟫ ( # 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(bflipset, wlar) ∧ valid-ebatbl(apebs, wlar, vols, vtblpnum) ∧ valid-vtbl(apebs, vols, wlar, vtblpnum) ∧ ubi-io-inv(apebs))

Rule argument

Additional information

Used simplifier rules: lf-valid-wl-not-erroneous: n < # wlar, stat ≠ erroneous ⊦ apebs[n] = mkpeb(aehdr, avhdr, buf, m, boolvar) ∧ wlar[n] = wl-entry(m0, stat) ∧ valid-wl(apebs, wlar) → ¬ boolvar;%lf-used-valid-peb: ⊦ n < # wlar ∧ wlar[n] = wl-entry(m, used) ∧ apebs[n] = apeb ∧ valid-wl(apebs, wlar) → valid-peb(apeb);%lf-used-info: ⊦ n < # wlar ∧ wlar[n] = wl-entry(m, used) ∧ valid-eraseq(wlar, q) → ¬ n ∈ q;%ubi-io-inv-fwd: n < # apebs ⊦ apebs[n] = apeb ∧ ubi-io-inv(apebs) → ubi-io-peb-inv(apeb);% ⊦ m < n → (n ≤ m ↔ false); (s)% ⊦ m < n ↔ ¬ n ≤ m; (ss)% ⊦ used ≠ erroneous; (s)