| # apebs = # wlar, ebae = unmapped, ebae = vols[v][vtblpnum2], vtblpnum0 = LEB_SIZE, vtblpnum1 = vtblpnum3, vtblpnum2 = vtblpnum4, vtblpnum2 < # vols[v], vtblpnum4 < # vols[v], bflipset-cons(bflipset, wlar), ubi-io-inv(apebs), unique-sqns(apebs), valid-ebatbl(apebs, wlar, vols, vtblpnum), valid-eraseq(q), valid-eraseq(wlar, q), valid-eraseq(apebs, q), valid-global-sqn(apebs, sqnum), valid-vtbl(apebs, vols, wlar, vtblpnum), valid-wl(apebs, wlar), v ∈ vols, vtblpnum3 + n ≤ LEB_SIZE, n0 + n ≤ # buf ⊦ ebae = unmapped, vtblpnum ∈ q, VTBL_VOLID ∈ vols |