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Proof step 49 from proof wlar-erase-worker-helper (previous step)

apebs0[n] = mkpeb(aehdr0, avhdr, buf, m1, false), wlar[n] = wl-entry(m0, stat0), apebs = apebs1[vtblpnum, apebs1[vtblpnum].echdr:= aehdr], apebs1 = apebs0[n, mkpeb(empty, empty, mkempbuf(LEB_SIZE), 0, false)], err = err0, vtblpnum = n, vtblpnum0 = n, vtblpnum1 = 1, wlar1 = wlar[n, wlar[n].ec:= (wlar[n].ec + 1)], n < # wlar, vtblpnum < # apebs1, n < # apebs0, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ [err1 := err; while err1 ≠ ESUCCESS ∧ vtblpnum1 ≤ UBI_ERASE_RETRIES do {wlar1[vtblpnum0].ec := wlar1[vtblpnum0].ec + 1; aubi_io_sync_erase#(vtblpnum0; apebs; err1); if err1 = ESUCCESS then aubi_io_write_echdr#(vtblpnum0, aechdr(wlar1[vtblpnum0].ec); apebs; err1) else debug#("ubi: erase of PEB " + vtblpnum0.toString + " failed"); vtblpnum1 := vtblpnum1 + 1}; if err1 = ESUCCESS then wlar1[vtblpnum0] := wl-entry(wlar1[vtblpnum0].ec, free) else {aubi_io_markbad#(vtblpnum0; apebs; err1); if err1 = ESUCCESS then wlar1[vtblpnum0] := wl-entry(wlar1[vtblpnum0].ec, erroneous) else debug#("ubi: marking PEB " + vtblpnum0.toString + " as bad failed")}] ∃ m, stat. m ≠ 0 ∧ m ≤ UBI_ERASE_RETRIES + 1 ∧ wlar1 = wlar[n, wl-entry(m0 + m, stat)], err = ESUCCESS, aehdr.valid?

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 50:
apebs0[n] = mkpeb(aehdr0, avhdr, buf, m1, false), wlar[n] = wl-entry(m0, stat0), apebs = apebs0[n, mkpeb(aehdr, empty, mkempbuf(LEB_SIZE), 0, false)], vtblpnum = n, vtblpnum1 = 1, wlar1 = wlar[n, wl-entry(m0 + 1, stat0)], n < # apebs0, n < # wlar, ⌊err0⌋ , ¬ aehdr.valid? ⊦ [err1 := err0; while err1 ≠ ESUCCESS ∧ vtblpnum1 ≤ UBI_ERASE_RETRIES do {wlar1[vtblpnum].ec := wlar1[vtblpnum].ec + 1; aubi_io_sync_erase#(vtblpnum; apebs; err1); if err1 = ESUCCESS then aubi_io_write_echdr#(vtblpnum, aechdr(wlar1[vtblpnum].ec); apebs; err1) else debug#("ubi: erase of PEB " + vtblpnum.toString + " failed"); vtblpnum1 := vtblpnum1 + 1}; if err1 = ESUCCESS then wlar1[vtblpnum] := wl-entry(wlar1[vtblpnum].ec, free) else {aubi_io_markbad#(vtblpnum; apebs; err1); if err1 = ESUCCESS then wlar1[vtblpnum] := wl-entry(wlar1[vtblpnum].ec, erroneous) else debug#("ubi: marking PEB " + vtblpnum.toString + " as bad failed")}] ∃ m, stat. m ≠ 0 ∧ m ≤ UBI_ERASE_RETRIES + 1 ∧ wlar1 = wlar[n, wl-entry(m0 + m, stat)]

Rule argument

Additional information

Used simplifier rules: ⊦ wl-entry(m, stat).ec:= m0 = wl-entry(m0, stat); (s)% ⊦ wl-entry(m, stat).ec = m; (s)%lf-02: ⊦ m < n ∧ m = n0 → n0 < n; (forward) from specification nat-basic% ⊦ ⌊err⌋ → err ≠ ESUCCESS; (s)% ⊦ # apebs[n, apeb] = # apebs; (s)%m < # apebs ⊦ apebs[m, apeb][m, apeb0] = apebs[m, apeb0]; (s)% ⊦ m < n → (n ≤ m ↔ false); (s)% ⊦ m < n ↔ ¬ n ≤ m; (ss)%⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).echdr:= aehdr0 = mkpeb(aehdr0, avhdr, buf, m, boolvar); (s)% ⊦ m < # apebs → apebs[m, apeb][m] = apeb; (s)