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Proof step 94 from proof refine-read-vidhdr (previous step)

# buf2 = EB_PAGE_SIZE, apebs[m2] = mkpeb(aehdr, avhdr1, buf0, m1, false), pebs[m2] = mkpeb(buf1, m, false), avhdr = avhdr0, m2 < # pebs, m2 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, m, false), mkpeb(aehdr, avhdr1, buf0, m1, false)), mtd-cons(pebs), ubi-io-inv(apebs), 2 * EB_PAGE_SIZE ≤ PEB_SIZE, ⌊err⌋ ⊦ ⟨aubi_io_read_vidhdr#(m2, apebs; avhdr0; isbad, err0)⟩ (avhdr = avhdr0 ∧ (bitflips ↔ isbad) ∧ err = err0)

Heuristic nonrec nowhile calls applied rule call right

And obtained the following new goals

Proof step 95:
# buf2 = EB_PAGE_SIZE, pebs[m2] = mkpeb(buf1, m0, false), apebs[m2] = mkpeb(aehdr, avhdr1, buf0, m1, false), avhdr = avhdr0, avhdr2 = avhdr0, m = m2, m2 < # apebs, m2 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, m0, false), mkpeb(aehdr, avhdr1, buf0, m1, false)), mtd-cons(pebs), ubi-io-inv(apebs), 2 * EB_PAGE_SIZE ≤ PEB_SIZE, ⌊err1⌋ ⊦ ⟨if ubi-io-read-vidhdr-pre(m, apebs) then {fail_or_success#(; ; err); bitflips := ?; if err = ESUCCESS then avhdr := apebs[m].vidhdr else avhdr := ?} else abort⟩ (avhdr2 = avhdr ∧ (bitflips0 ↔ bitflips) ∧ err1 = err)

Rule argument

pos: right 1

Additional information

Used simplifier rules: aubi_io_read_vidhdr#(PNUM, APEBS; AVHDR; BITFLIPS, ERR) {if ubi-io-read-vidhdr-pre(PNUM, APEBS) then {fail_or_success#(; ; ERR); BITFLIPS := ?; if ERR = ESUCCESS then AVHDR := APEBS[PNUM].vidhdr else AVHDR := ?} else abort };