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Proof step 148 from proof refine-write-data-wl (previous step)

pebs[m1] = mkpeb(buf0, 2 * EB_PAGE_SIZE, false), apebs[m1] = mkpeb(aehdr, avhdr, buf2, 0, false), err = err1, n = align↑(datasize(buf, n), EB_PAGE_SIZE), avhdr.valid?, aehdr.valid?, m1 < # pebs, m1 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf0, 2 * EB_PAGE_SIZE, false), mkpeb(aehdr, avhdr, buf2, 0, false)), is-aligned(n, EB_PAGE_SIZE), mtd-cons(pebs), ubi-io-inv(apebs), n ≤ # buf, n ≤ LEB_SIZE, ⌊err1⌋ ⊦ ∃ buf1. (# buf1 ≤ n → is-aligned(# buf1, EB_PAGE_SIZE) → ¬ datasize(buf1, # buf1) < datasize(buf, n) → n ≥ # buf1) ∧ ( # buf1 ≤ n ∧ is-aligned(# buf1, EB_PAGE_SIZE) ∧ ( datasize(buf1, # buf1) < datasize(buf, n) ∨ checksum(buf1 + mkempbuf(n - # buf1), datasize(buf, n)) ≠ checksum(buf, datasize(buf, n)))) ∧ ⟨apebs[m1] := mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, buf1 + mkempbuf(LEB_SIZE - # buf1), # buf1, apebs[m1].bad)⟩ (abs(pebs, apebs) ∧ err1 = err), datasize(buf, n) = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 149:
pebs[m1] = mkpeb(buf0, 2 * EB_PAGE_SIZE, false), apebs[m1] = mkpeb(aehdr, avhdr, buf2, 0, false), n = align↑(datasize(buf, n), EB_PAGE_SIZE), datasize(buf, n) ≠ 0, avhdr.valid?, aehdr.valid?, m1 < # pebs, m1 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf0, 2 * EB_PAGE_SIZE, false), mkpeb(aehdr, avhdr, buf2, 0, false)), is-aligned(n, EB_PAGE_SIZE), mtd-cons(pebs), ubi-io-inv(apebs), n ≤ # buf, n ≤ LEB_SIZE, ⌊err1⌋ ⊦ ∃ buf1. # buf1 ≤ n ∧ is-aligned(# buf1, EB_PAGE_SIZE) ∧ ( datasize(buf1, # buf1) < datasize(buf, n) ∨ checksum(buf1 + mkempbuf(n - # buf1), datasize(buf, n)) ≠ checksum(buf, datasize(buf, n))) ∧ ⟨apebs[m1] := mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, buf1 + mkempbuf(LEB_SIZE - # buf1), # buf1, apebs[m1].bad)⟩ abs(pebs, apebs)

Rule argument

Additional information

Used simplifier rules: abs-fwd: ⊦ n < # pebs ∧ pebs[n] = peb ∧ abs(pebs, apebs) → n < # apebs ∧ abs-peb(peb, apebs[n]); (forward) from specification ubi-io-abs% ⊦ n ≥ m ↔ m ≤ n; (s)