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Proof step 150 from proof refine-write-data-wl (previous step)

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 151:
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⌋ ⊦ ⟨apebs[m1] := mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, mkempbuf(LEB_SIZE - 0), 0, apebs[m1].bad)⟩ abs(pebs, apebs)

Rule argument

Additional information

Used simplifier rules: append-a: ⊦ (buf + buf0) + buf1 = buf + buf0 + buf1; from specification array-splice[buffer]% ⊦ mkbuf(0) + buf = buf; (s)% ⊦ 0 < m ↔ m ≠ 0; (s)% ⊦ datasize(buf, 0) = 0; (s)%n ≠ 0 ⊦ is-aligned(0, n); (s)% ⊦ EB_PAGE_SIZE ≠ 0; (s)% ⊦ 0 ≤ m; (s)% ⊦ # mkbuf(n) = n; (s)