[Imprint][Data Privacy Statement][E-Mail]

View long theorem info. View the proof. Back to main index. View the specification. View theorem base summary, View theorem base listing, the used properties by spec, the dependency list, the symbol table,

Proof step 21 from proof refine-read-vidhdr (previous step)

pebs[m2] = mkpeb(buf1, m, false), apebs[m2] = mkpeb(aehdr, avhdr1, buf0, m1, false), emptypage = subarray(buf1, EB_PAGE_SIZE, EB_PAGE_SIZE), m2 < # apebs, m2 < # pebs, 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 ⊦ ⟨aubi_io_read_vidhdr#(m2, apebs; avhdr0; isbad, err0)⟩ (empty = avhdr0 ∧ (bitflips ↔ isbad) ∧ ESUCCESS = err0)

Heuristic nonrec nowhile calls applied rule call right

And obtained the following new goals

Proof step 22:
apebs[m2] = mkpeb(aehdr, avhdr1, buf0, m1, false), pebs[m2] = mkpeb(buf1, m0, false), avhdr = avhdr0, emptypage = subarray(buf1, EB_PAGE_SIZE, EB_PAGE_SIZE), m = m2, m2 < # pebs, m2 < # apebs, 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 ⊦ ⟨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⟩ (empty = avhdr ∧ (bitflips0 ↔ bitflips) ∧ ESUCCESS = 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 };