| avols[v][m2] = mapped(buf0, m), n0 < n, m2 < # avols[v], ebm-cons(avols0), ebm-cons(avols), is-aligned(n0, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), is-aligned(m1, EB_PAGE_SIZE), v ∈ avols, n + n2 ≤ # buf, m1 + n ≤ LEB_SIZE, m ≤ m1, avols ⊆ avols0 ⊦ ⟨skip⟩ true |