| apebs[n0] = mkpeb(aehdr, avhdr, buf, m0, boolvar), recs[avhdr.vol × avhdr.leb] = recovery-entry(n0, n1), wlar[n0] = wl-entry(m1, stat), stat = used, n0 < # apebs, valid-eraseq(wlar, q), avhdr.vol × avhdr.leb ∈ recs, n0 ∈ q, ∀ ladr, m. ladr ∈ recs ∧ recs[ladr].pnum = m ↔ wlar[m].status = used ∧ m < # apebs ∧ apebs[m].vidhdr.vol = ladr.vol ∧ apebs[m].vidhdr.leb = ladr.leb ⊦ n0 = # apebs |
wlar[n0] = wl-entry(m1, used), recs[avhdr.vol × avhdr.leb] = recovery-entry(n0, n1), apebs[n0] = mkpeb(aehdr, avhdr, buf, m0, boolvar), n0 < # apebs, valid-eraseq(wlar, q), n0 ∈ q, avhdr.vol × avhdr.leb ∈ recs, ∀ ladr, m. ladr ∈ recs ∧ recs[ladr].pnum = m ↔ wlar[m].status = used ∧ m < # apebs ∧ apebs[m].vidhdr.vol = ladr.vol ∧ apebs[m].vidhdr.leb = ladr.leb ⊦ n0 = # apebs