| v ∈ avols, m < # avols[v], m0 + n ≤ LEB_SIZE, is-aligned(m0, EB_PAGE_SIZE), is-aligned(n, EB_PAGE_SIZE), n + n0 ≤ # buf, avols[v][m].mapped? → m0 ≥ avols[v][m].fill, ebm-cons(avols), avols ⊆ avols0, ebm-cons(avols) → ebm-cons(avols0) ⊦ ⟨ebm_write#(v, m, m0, n0, n, buf; avols; err)⟩ (avols ⊆ avols0 ∧ (ebm-cons(avols) → ebm-cons(avols0))) |