| avols[v][m] = mapped(buf, m0), m < # avols[v], m0 + m1 < LEB_SIZE, v ∈ avols, ∀ v. v ∈ avols → ebm-cons(avols[v]) ⊦ buf[m1 + m0] = empty |
avols[v][m] = mapped(buf, m0), m0 + m1 < LEB_SIZE, m < # avols[v], v ∈ avols, ∀ v. v ∈ avols → ebm-cons(avols[v]) ⊦ buf[m1 + m0] = empty