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Proof step 430 from proof refine-write (previous step)

# apebs = # wlar, avols[v][vtblpnum3] = mapped(buf1, m), vols[v][vtblpnum3] = ⌜n⌝ , apebs[n] = mkpeb(aehdr, avhdr, buf1, m0, false), avhdr.valid?, vtblpnum3 < # avols[v], vtblpnum3 < # vols[v], n < # wlar, abs(avols, apebs, vols, q), bflipset-cons(bflipset, wlar), ebm-cons(avols), is-aligned(vtblpnum5, EB_PAGE_SIZE), ubi-io-inv(apebs), ubi-io-peb-inv(mkpeb(aehdr, avhdr, buf1, 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, m0 ≤ LEB_SIZE, m ≤ vtblpnum5, n2 ≤ # buf, vtblpnum5 ≤ LEB_SIZE, m0 ≤ vtblpnum5, m ≤ LEB_SIZE ⊦ ⟨choose err0 with ⌊err0⌋ ∨ err0 = ESUCCESS in err := err0; if err = ESUCCESS then if avols[v][vtblpnum3].mapped? then skip else avols[v][vtblpnum3] := mapped(mkempbuf(vtblpnum5) + subarray(buf, n2, 0) + mkempbuf(LEB_SIZE - vtblpnum5 - 0), vtblpnum5) else if avols[v][vtblpnum3].mapped? then {n0 := 0; choose n with n < n0 ∧ is-aligned(n, EB_PAGE_SIZE) in if n ≠ 0 then avols[v][vtblpnum3] := mapped (subarray(avols[v][vtblpnum3].data, 0, vtblpnum5) + subarray(buf, n2, n) + mkempbuf(LEB_SIZE - vtblpnum5 - n), vtblpnum5 + n) ifnone skip}⟩ (abs(avols, apebs, vols, q) ∧ ESUCCESS = err), VTBL_VOLID ∈ vols

Heuristic symbolic execution applied rule choose right

And obtained the following new goals

Rule argument

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