| n = 0, m2 < # avols[v], ebm-cons(avols), ebm-cons(avols0), is-aligned(m1, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), v ∈ avols, m1 + n ≤ LEB_SIZE, n + n2 ≤ # buf, avols ⊆ avols0, avols[v][m2].mapped? → avols[v][m2].fill ≤ m1 ⊦ ⟨skip⟩ (avols ⊆ avols0), avols[v][m2].mapped? |