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Proof step 10 from proof wlar-erase-worker-helper (previous step)

wlar[n] = wl-entry(m0, stat0), err = EIO, vtblpnum = 0, vtblpnum0 = n, wlar0 = wlar, vtblpnum0 < # wlar, n < # wlar ⊦ [aubi_io_sync_erase#(vtblpnum0; apebs; err); wlar[vtblpnum0].ec := wlar[vtblpnum0].ec + 1; if err = ESUCCESS then aubi_io_write_echdr#(vtblpnum0, aechdr(wlar[vtblpnum0].ec); apebs; err) else debug#("ubi: erase of PEB " + vtblpnum0.toString + " failed"); vtblpnum := vtblpnum + 1; while err ≠ ESUCCESS ∧ vtblpnum ≤ UBI_ERASE_RETRIES do {wlar[vtblpnum0].ec := wlar[vtblpnum0].ec + 1; aubi_io_sync_erase#(vtblpnum0; apebs; err); if err = ESUCCESS then aubi_io_write_echdr#(vtblpnum0, aechdr(wlar[vtblpnum0].ec); apebs; err) else debug#("ubi: erase of PEB " + vtblpnum0.toString + " failed"); vtblpnum := vtblpnum + 1}; if err = ESUCCESS then wlar[vtblpnum0] := wl-entry(wlar[vtblpnum0].ec, free) else {aubi_io_markbad#(vtblpnum0; apebs; err); if err = ESUCCESS then wlar[vtblpnum0] := wl-entry(wlar[vtblpnum0].ec, erroneous) else debug#("ubi: marking PEB " + vtblpnum0.toString + " as bad failed")}] ∃ m, stat. m ≠ 0 ∧ m ≤ UBI_ERASE_RETRIES + 1 ∧ wlar = wlar0[n, wl-entry(m0 + m, stat)]

Heuristic nonrecursive calls applied rule call right

And obtained the following new goals

Proof step 11:
wlar[n] = wl-entry(m0, stat0), err = EIO, vtblpnum = vtblpnum0, vtblpnum0 = n, vtblpnum1 = 0, wlar0 = wlar, n < # wlar, vtblpnum0 < # wlar ⊦ [if ubi-io-erase-pre(vtblpnum, apebs) then {fail_or_success#(; ; err); if err = ESUCCESS then apebs[vtblpnum] := mkpeb(empty, empty, mkempbuf(LEB_SIZE), 0, false) else {choose apeb with ubi-io-peb-inv(apeb) ∧ ¬ apeb.bad ∧ ¬ apeb.vidhdr.valid? in apebs[vtblpnum] := apeb or skip}} else abort; wlar[vtblpnum0].ec := wlar[vtblpnum0].ec + 1; if err = ESUCCESS then aubi_io_write_echdr#(vtblpnum0, aechdr(wlar[vtblpnum0].ec); apebs; err) else debug#("ubi: erase of PEB " + vtblpnum0.toString + " failed"); vtblpnum1 := vtblpnum1 + 1; while err ≠ ESUCCESS ∧ vtblpnum1 ≤ UBI_ERASE_RETRIES do {wlar[vtblpnum0].ec := wlar[vtblpnum0].ec + 1; aubi_io_sync_erase#(vtblpnum0; apebs; err); if err = ESUCCESS then aubi_io_write_echdr#(vtblpnum0, aechdr(wlar[vtblpnum0].ec); apebs; err) else debug#("ubi: erase of PEB " + vtblpnum0.toString + " failed"); vtblpnum1 := vtblpnum1 + 1}; if err = ESUCCESS then wlar[vtblpnum0] := wl-entry(wlar[vtblpnum0].ec, free) else {aubi_io_markbad#(vtblpnum0; apebs; err); if err = ESUCCESS then wlar[vtblpnum0] := wl-entry(wlar[vtblpnum0].ec, erroneous) else debug#("ubi: marking PEB " + vtblpnum0.toString + " as bad failed")}] ∃ m, stat. m ≠ 0 ∧ m ≤ UBI_ERASE_RETRIES + 1 ∧ wlar = wlar0[n, wl-entry(m0 + m, stat)]

Rule argument

pos: right 1

Additional information

Used simplifier rules: aubi_io_sync_erase#(PNUM; APEBS; ERR) {if ubi-io-erase-pre(PNUM, APEBS) then {fail_or_success#(; ; ERR); if ERR = ESUCCESS then APEBS[PNUM] := mkpeb(empty, empty, mkempbuf(LEB_SIZE), 0, false) else { choose APEB with ubi-io-peb-inv(APEB) ∧ ¬ APEB.bad ∧ ¬ APEB.vidhdr.valid? in APEBS[PNUM] := APEB or skip}} else abort };