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Proof step 144 from proof refine-write-data (previous step)

# buf1 = PEB_SIZE, n4 + m2 = LEB_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), 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, (2 * EB_PAGE_SIZE + m2) + n4 ≤ # buf1, (2 * EB_PAGE_SIZE + m2) + n4 ≤ # emptypeb, ⌊err1⌋ , ∀ n. n < n4 → buf1[(2 * EB_PAGE_SIZE + m2) + n] = (emptypeb)[(2 * EB_PAGE_SIZE + m2) + n] ⊦ 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 145:
# buf1 = PEB_SIZE, n4 + m2 = LEB_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), 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⌋ , ∀ n5. n5 < n4 → buf1[(2 * EB_PAGE_SIZE + m2) + n5] = empty ⊦ buf1[2 * EB_PAGE_SIZE + (m1 + n3) + n1] = empty, aehdr = empty, n3 = 0

Rule argument

Additional information

Used simplifier rules: ⊦ m ≤ m; (s)% ⊦ m ≤ n → (n ≤ m ↔ m = n); (s)%let: ⊦ n ≤ n0 ∧ n0 ≤ n1 → n ≤ n1; (forward) from specification nat%n < # emptypeb ⊦ (emptypeb)[n] = empty; (s)% ⊦ m = m0 + n0 ∧ n < n0 → m0 + n < m; (s)%c: ⊦ m + n = n + m; from specification nat-basic%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic% ⊦ # emptypeb = PEB_SIZE; (s)