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Proof step 69 from proof refine-write-data-wl (previous step)

apebs[m1] = mkpeb(aehdr, avhdr, buf0, 0, false), pebs[m1] = mkpeb(buf1, 2 * EB_PAGE_SIZE, false), err = err0, n = align↑(datasize(buf, n), EB_PAGE_SIZE), n1 = 0, aehdr.valid?, avhdr.valid?, m1 < # apebs, m1 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 2 * EB_PAGE_SIZE, false), mkpeb(aehdr, avhdr, buf0, 0, false)), is-aligned(n, EB_PAGE_SIZE), mtd-cons(pebs), ubi-io-inv(apebs), n ≤ LEB_SIZE, n ≤ # buf, ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪n0 := n; m0 := m1; m := 2 * EB_PAGE_SIZE; choose n2 with (n2 < n0 ∨ n2 = 0 ∧ n0 = 0) ∧ is-aligned(n2, EB_PAGE_SIZE) in if n2 ≠ 0 then {pebs[m0].data := copy(buf, n1, pebs[m0].data, m, n2); pebs[m0].fill := m + n2}⟫ ⟨aubi_io_write_data_wl#(m1, n, buf; apebs; err1)⟩ (abs(pebs, apebs) ∧ err = err1), datasize(buf, n) = 0, err = ESUCCESS

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Rule argument

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