| ⊦ v ∈ vols ∧ m < # vols[v] ∧ valid-eraseq-strong(apebs, to-vtbl(vols), q) ∧ valid-peb(v, m, apebs[n]) ∧ apebs[n].vidhdr.sqn = valid-sqns(v, m, apebs).max → ¬ n ∈ q |
apebs[n].vidhdr.sqn = valid-sqns(v, m, apebs).max, m < # vols[v], valid-eraseq-strong(apebs, to-vtbl(vols), q), valid-peb(v, m, apebs[n]), n ∈ q, v ∈ vols ⊦