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Proof step 398 from proof refine-write (previous step)

# buf0 = vtblpnum5 + n, # apebs = # wlar, apebs[n4] = mkpeb(aehdr, avhdr, buf2, m0, false), vols[v][vtblpnum3] = ⌜n4⌝ , avols[v][vtblpnum3] = mapped(buf2, m), wlar[n4] = wl-entry(m1, used), aehdr.valid?, avhdr.valid?, vtblpnum3 < # avols[v], n4 < # wlar, vtblpnum3 < # vols[v], abs(avols, apebs, vols, q), bflipset-cons(bflipset, wlar), ebm-cons(avols), is-aligned(vtblpnum5, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), range=(buf0, vtblpnum5, mkbuf(vtblpnum5 + n), vtblpnum5, n), ubi-io-inv(apebs), ubi-io-peb-inv(mkpeb(aehdr, avhdr, buf2, m0, false)), unique-sqns(apebs), valid-ebatbl(apebs, wlar, vols, vtblpnum4), valid-eraseq(q), valid-eraseq(wlar, q), valid-eraseq(apebs, q), valid-global-sqn(apebs, sqnum), valid-vtbl(apebs, vols, wlar, vtblpnum4), valid-wl(apebs, wlar), v ∈ avols, v ∈ vols, vtblpnum5 ≤ LEB_SIZE, m ≤ LEB_SIZE, m0 ≤ LEB_SIZE, vtblpnum5 + n ≤ LEB_SIZE, n3 + n ≤ # buf3, n + n3 ≤ # buf3, m ≤ vtblpnum5, m0 ≤ vtblpnum5, ⌊err0⌋ , ⌊err3⌋ ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then if avols[v][vtblpnum3].mapped? then if n ≠ 0 then avols[v][vtblpnum3] := mapped (subarray(avols[v][vtblpnum3].data, 0, vtblpnum5) + subarray(buf3, n3, n) + mkempbuf(LEB_SIZE - vtblpnum5 - n), vtblpnum5 + n) else avols[v][vtblpnum3] := mapped(mkempbuf(vtblpnum5) + subarray(buf3, n3, n) + mkempbuf(LEB_SIZE - vtblpnum5 - n), vtblpnum5 + n) else if avols[v][vtblpnum3].mapped? then choose n1 with n1 < n ∧ is-aligned(n1, EB_PAGE_SIZE) in if n1 ≠ 0 then avols[v][vtblpnum3] := mapped (subarray(avols[v][vtblpnum3].data, 0, vtblpnum5) + subarray(buf3, n3, n1) + mkempbuf(LEB_SIZE - vtblpnum5 - n1), vtblpnum5 + n1) ifnone skip else if n ≠ 0 then avols[v][vtblpnum3] := unmapped⟩ (abs(avols, apebs, vols, q) ∧ err0 = err), n = 0, vtblpnum4 = n4, VTBL_VOLID ∈ vols

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

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