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Proof step 141 from proof refine-write-data (previous step)

# buf1 = PEB_SIZE, 2 * EB_PAGE_SIZE + m2 = (avhdr = empty ⊃ EB_PAGE_SIZE;m2 + 2 * EB_PAGE_SIZE), LEB_SIZE = (n2 + n3) + m1, PEB_SIZE = n4 + 2 * EB_PAGE_SIZE + m2, pebs[m3] = mkpeb(buf1, 2 * EB_PAGE_SIZE + m2, false), apebs[m3] = mkpeb(aehdr, avhdr, subarray(buf1, 2 * EB_PAGE_SIZE, LEB_SIZE), m2, false), aehdr.valid?, avhdr.valid?, n1 < n2, m3 < # pebs, m3 < # apebs, n3 < n, abs(pebs, apebs), abs-echdr(subarray(buf1, 0, EB_PAGE_SIZE), aehdr), abs-vidhdr(subarray(buf1, EB_PAGE_SIZE, EB_PAGE_SIZE), avhdr), is-aligned(m2, EB_PAGE_SIZE), is-aligned(n3, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), is-aligned(m1, EB_PAGE_SIZE), range=(buf1, 2 * EB_PAGE_SIZE + m2, emptypeb, 2 * EB_PAGE_SIZE + m2, n4), ubi-io-inv(apebs), 2 * EB_PAGE_SIZE + m2 ≤ PEB_SIZE, n0 + n3 ≤ # buf, m2 ≤ m1, (m1 + 2 * EB_PAGE_SIZE) + n3 ≤ PEB_SIZE, n0 + n ≤ # buf, m1 + n ≤ LEB_SIZE, m2 ≤ LEB_SIZE, m1 ≤ LEB_SIZE, m1 + n3 ≤ LEB_SIZE, n3 + m1 ≤ LEB_SIZE, ⌊err1⌋ ⊦ buf1[2 * EB_PAGE_SIZE + (m1 + n3) + n1] = empty, aehdr = empty, n3 = 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 142:
# buf1 = PEB_SIZE, 2 * EB_PAGE_SIZE + m2 = (avhdr = empty ⊃ EB_PAGE_SIZE;m2 + 2 * EB_PAGE_SIZE), n4 + m2 = LEB_SIZE, LEB_SIZE = (n2 + n3) + m1, PEB_SIZE = n4 + 2 * EB_PAGE_SIZE + m2, apebs[m3] = mkpeb(aehdr, avhdr, subarray(buf1, 2 * EB_PAGE_SIZE, LEB_SIZE), m2, false), pebs[m3] = mkpeb(buf1, 2 * EB_PAGE_SIZE + m2, false), avhdr.valid?, aehdr.valid?, n3 < n, m3 < # apebs, m3 < # pebs, n1 < n2, abs(pebs, apebs), abs-echdr(subarray(buf1, 0, EB_PAGE_SIZE), aehdr), abs-vidhdr(subarray(buf1, EB_PAGE_SIZE, EB_PAGE_SIZE), avhdr), is-aligned(m1, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), is-aligned(n3, EB_PAGE_SIZE), is-aligned(m2, EB_PAGE_SIZE), range=(buf1, 2 * EB_PAGE_SIZE + m2, emptypeb, 2 * EB_PAGE_SIZE + m2, n4), ubi-io-inv(apebs), n3 + m1 ≤ LEB_SIZE, m1 + n3 ≤ LEB_SIZE, m1 ≤ LEB_SIZE, m2 ≤ LEB_SIZE, m1 + n ≤ LEB_SIZE, n0 + n ≤ # buf, (m1 + 2 * EB_PAGE_SIZE) + n3 ≤ PEB_SIZE, m2 ≤ m1, n0 + n3 ≤ # buf, 2 * EB_PAGE_SIZE + m2 ≤ PEB_SIZE, ⌊err1⌋ ⊦ buf1[2 * EB_PAGE_SIZE + (m1 + n3) + n1] = empty, aehdr = empty, n3 = 0

Rule argument

Additional information

Used simplifier rules: c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic%mult-c: ⊦ m * n = n * m; from specification nat-mult%mult-a: ⊦ m0 * m * n = (m0 * m) * n; from specification nat-mult%pebsize-minus-2eb-page-size: ⊦ PEB_SIZE = n + 2 * EB_PAGE_SIZE → n = LEB_SIZE; (forward) from specification eraseblock