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Proof step 20 from proof crash-neutral-write-data-wl (previous step)

apebs[n2] = mkpeb(aehdr, avhdr, buf0, 0, false), n1 = align↑(datasize(buf, n1), EB_PAGE_SIZE), avhdr.valid?, aehdr.valid?, n2 < # apebs, ubi-io-inv(apebs), n1 ≤ # buf, n1 ≤ LEB_SIZE, LEB_SIZE ≥ 0 ⊦ apebs = apebs[n2, mkpeb(apebs[n2].echdr, apebs[n2].vidhdr, mkempbuf(LEB_SIZE - 0), 0, apebs[n2].bad)], datasize(buf, n1) = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 21:
apebs[n2] = mkpeb(aehdr, avhdr, buf0, 0, false), n1 = align↑(datasize(buf, n1), EB_PAGE_SIZE), avhdr.valid?, aehdr.valid?, n2 < # apebs, ubi-io-inv(apebs), n1 ≤ # buf, n1 ≤ LEB_SIZE ⊦ apebs = apebs[n2, mkpeb(aehdr, avhdr, mkempbuf(LEB_SIZE), 0, false)], datasize(buf, n1) = 0

Rule argument

Additional information

Used simplifier rules: ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).bad ↔ boolvar; (s)% ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).vidhdr = avhdr; (s)% ⊦ mkpeb(aehdr, avhdr, buf, m, boolvar).echdr = aehdr; (s)% ⊦ 0 ≤ m; (s)% ⊦ n ≥ m ↔ m ≤ n; (s)% ⊦ m - 0 = m; (s)