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Proof step 4 from proof valid-recs-next-update (previous step)

# wlar = # apebs, recs[v × n] = recovery-entry(m3, m4), apebs[m] = mkpeb(aehdr, avidhdr(v, n, m0, m1, m5), buf, m2, boolvar), ladr = v0 × m7, m < # apebs, v × n ∈ recs, ∀ ladr, m6. ladr ∈ recs ∧ recs[ladr].pnum = m6 ↔ wlar[m6].status = used ∧ m6 < m ∧ apebs[m6].vidhdr.vol = ladr.vol ∧ apebs[m6].vidhdr.leb = ladr.leb ⊦ ladr ∈ recs[v × n, recovery-entry(m, m0)] ∧ recs[v × n, recovery-entry(m, m0)][ladr].pnum = m6 ↔ subarray(wlar[m, wl-entry(n0, used)][m3, wl-entry(n1, erasing)], 0, m + 1)[m6].status = used ∧ ¬ m < m6 ∧ subarray(apebs, 0, m + 1)[m6].vidhdr.vol = v0 ∧ subarray(apebs, 0, m + 1)[m6].vidhdr.leb = m7

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

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