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Proof step 91 from proof refine-read-echdr (previous step)

pebs[m2] = mkpeb(buf1, m0, false), apebs[m2] = mkpeb(aehdr1, avhdr, buf0, m1, false), aehdr = aehdr0, aehdr2 = aehdr0, m = m2, m2 < # apebs, m2 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, m0, false), mkpeb(aehdr1, avhdr, buf0, m1, false)), mtd-cons(pebs), ubi-io-inv(apebs), EB_PAGE_SIZE ≤ PEB_SIZE, ⌊err1⌋ ⊦ subarray(buf1, 0, EB_PAGE_SIZE) = emptypage, ubi-io-read-echdr-pre(m, apebs)

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: # buf = n ⊦ subarray(buf, 0, n) = buf; (s)% ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).bad ↔ boolvar; (s)%n < # pebs ⊦ pebs[n] = mkpeb(buf, m, boolvar) ∧ mtd-cons(pebs) → # buf = PEB_SIZE; (s)% ⊦ m < n → (n ≤ m ↔ false); (s)% ⊦ m < n ↔ ¬ n ≤ m; (ss)%abs-fwd: ⊦ n < # pebs ∧ pebs[n] = peb ∧ abs(pebs, apebs) → n < # apebs ∧ abs-peb(peb, apebs[n]); (forward) from specification ubi-io-abs% ⊦ ubi-io-read-echdr-pre(n, apebs) ↔ n < # apebs ∧ ¬ apebs[n].bad; (s)