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Proof step 5 from proof refine-read-vidhdr (previous step)

apebs[m] = mkpeb(aehdr, avhdr1, buf, m0, false), avhdr = avhdr0, m < # apebs, abs(pebs, apebs), mtd-cons(pebs), ubi-io-inv(apebs) ⊦ ⟪ubi_io_read_vidhdr#(m, EB_PAGE_SIZE, pebs; avhdr; bitflips, err)⟫ ⟨aubi_io_read_vidhdr#(m, 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 6:
apebs[m2] = mkpeb(aehdr, avhdr1, buf, m1, false), avhdr = avhdr0, m = EB_PAGE_SIZE, m0 = m2, m2 < # apebs, abs(pebs, apebs), mtd-cons(pebs), ubi-io-inv(apebs) ⊦ ⟪if m0 < # pebs ∧ ¬ pebs[m0].bad then let buf = mkbuf(m) in {ubi_io_read#(m0, m, 0, m, pebs; buf; bitflips, err); if err = ESUCCESS then if isempty(buf) then avhdr := empty else let vhdr = ? in {decode_vidheader#(m, buf; vhdr; err); if err = ESUCCESS then avhdr := avidhdr(vhdr.vol, vhdr.leb, vhdr.sqn, vhdr.size, vhdr.checksum)}} else abort⟫ ⟨aubi_io_read_vidhdr#(m2, apebs; avhdr0; isbad, err0)⟩ (avhdr = avhdr0 ∧ (bitflips ↔ isbad) ∧ err = err0)

Rule argument

pos: right 1

Additional information

Used simplifier rules: ubi_io_read_vidhdr#(PNUM, PAGESIZE, PEBS; AVHDR; BITFLIPS, ERR) {if PNUM < # PEBS ∧ ¬ PEBS[PNUM].bad then let BUF = mkbuf(PAGESIZE) in {ubi_io_read# (PNUM, PAGESIZE, 0, PAGESIZE, PEBS; BUF; BITFLIPS, ERR); if ERR = ESUCCESS then if isempty(BUF) then AVHDR := empty else let VHDR = ? in {decode_vidheader#(PAGESIZE, BUF; VHDR; ERR); if ERR = ESUCCESS then AVHDR := avidhdr (VHDR.vol, VHDR.leb, VHDR.sqn, VHDR.size, VHDR.checksum)}} else abort };