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Proof step 24 from proof refine-write-data (previous step)

pebs[m3] = mkpeb(buf1, 2 * EB_PAGE_SIZE + m2, false), apebs[m3] = mkpeb(aehdr, avhdr, buf0, m2, false), aehdr.valid?, avhdr.valid?, m3 < # pebs, m3 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 2 * EB_PAGE_SIZE + m2, false), mkpeb(aehdr, avhdr, buf0, m2, false)), is-aligned(n, EB_PAGE_SIZE), is-aligned(m1, EB_PAGE_SIZE), mtd-cons(pebs), ubi-io-inv(apebs), m2 ≤ m1, (m1 + 2 * EB_PAGE_SIZE) + n ≤ PEB_SIZE, n2 + n ≤ # buf, m1 + n ≤ LEB_SIZE ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then apebs[m3] := mkpeb (apebs[m3].echdr, apebs[m3].vidhdr, subarray(apebs[m3].data, 0, m1) + subarray(buf, n2, n) + mkempbuf(LEB_SIZE - m1 - n), m1 + n, apebs[m3].bad) else {n1 := n2; n0 := n; m0 := m3; m := m1; choose n3 with (n3 < n0 ∨ n3 = 0 ∧ n0 = 0) ∧ is-aligned(n3, EB_PAGE_SIZE) in if n3 ≠ 0 then apebs[m0] := mkpeb (apebs[m0].echdr, apebs[m0].vidhdr, subarray(apebs[m0].data, 0, m) + subarray(buf, n1, n3) + mkempbuf(LEB_SIZE - m - n3), m + n3, apebs[m0].bad)}⟩ ( abs(pebs[m3, (pebs[m3].data:= copy(buf, n2, pebs[m3].data, m1 + 2 * EB_PAGE_SIZE, n)).fill:= ((m1 + 2 * EB_PAGE_SIZE) + n)], apebs) ∧ ESUCCESS = err)

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

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