| m < # avol, avol[m].mapped?, n + n0 ≤ # buf, m0 + n0 ≤ LEB_SIZE, ebm-vol-inv(avol), # lpt = # avol, adr = adr0, m1 = m2, plog = plog0, lpt0 = lpt, avol ⊆ avol0, ns = ns0 ⊦ ⟨apersistence_io_read#(m, m0, n, n0, adr0, m2, plog0, avol, lpt, ns0; buf; err)⟩ (adr = adr0 ∧ m1 = m2 ∧ plog = plog0 ∧ lpt0 = lpt ∧ avol ⊆ avol0 ∧ ns = ns0) |