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Proof step 30 from proof refine-write-data-wl (previous step)

apebs[m1] = mkpeb(aehdr, avhdr, buf2, 0, false), pebs[m1] = mkpeb(buf1, 2 * EB_PAGE_SIZE, false), err = ESUCCESS, n = align↑(datasize(buf, n), EB_PAGE_SIZE), aehdr.valid?, avhdr.valid?, m1 < # apebs, m1 < # pebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 2 * EB_PAGE_SIZE, false), mkpeb(aehdr, avhdr, buf2, 0, false)), is-aligned(n, EB_PAGE_SIZE), mtd-cons(pebs), ubi-io-inv(apebs), 2 * EB_PAGE_SIZE + n ≤ PEB_SIZE, n ≤ LEB_SIZE, n ≤ # buf ⊦ ⟨apebs[m1] := mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, subarray(buf, 0, n) + mkempbuf(LEB_SIZE - n), n, apebs[m1].bad)⟩ (abs(pebs[m1, (pebs[m1].data:= copy(buf, 0, pebs[m1].data, 2 * EB_PAGE_SIZE, n)).fill:= (2 * EB_PAGE_SIZE + n)], apebs) ∧ ESUCCESS = err), datasize(buf, n) = 0

Heuristic symbolic execution applied rule assign right

And obtained the following new goals

Proof step 31:
pebs[m1] = mkpeb(buf1, 2 * EB_PAGE_SIZE, false), apebs[m1] = mkpeb(aehdr, avhdr, buf2, 0, false), err = ESUCCESS, n = align↑(datasize(buf, n), EB_PAGE_SIZE), avhdr.valid?, aehdr.valid?, m1 < # pebs, m1 < # apebs, abs(pebs, apebs), abs-peb(mkpeb(buf1, 2 * EB_PAGE_SIZE, false), mkpeb(aehdr, avhdr, buf2, 0, false)), is-aligned(n, EB_PAGE_SIZE), mtd-cons(pebs), ubi-io-inv(apebs), 0 + n ≤ # buf, n ≤ # buf, n ≤ LEB_SIZE, 2 * EB_PAGE_SIZE + n ≤ PEB_SIZE, LEB_SIZE ≥ n ⊦ datasize(buf, n) = 0, abs (pebs[m1, (pebs[m1].data:= copy(buf, 0, pebs[m1].data, 2 * EB_PAGE_SIZE, n)).fill:= (2 * EB_PAGE_SIZE + n)], apebs[m1, mkpeb(apebs[m1].echdr, apebs[m1].vidhdr, subarray(buf, 0, n) + mkempbuf(LEB_SIZE - n), n, apebs[m1].bad)]) ∧ ESUCCESS = err

Rule argument

Additional information

Used simplifier rules: ⊦ n + 0 = n; (s)%a: ⊦ (m + n0) + n1 = m + n0 + n1; from specification nat-basic%c: ⊦ m + n = n + m; from specification nat-basic% ⊦ n ≥ m ↔ m ≤ n; (s)