| bleb ≠ nobuffer, # avol[bleb.leb].data + n ≤ LEB_SIZE, n ≤ # buf, awbuf-inv(avol, bleb), # lpt = # avol, synced(avol0), adr = adr0, m = m0, nx = nx0, lpt0 = lpt, avol0 ↓ avol, ns = ns0 ⊦ ⟨awbuf_write_buf#(n, buf, adr0, m0, nx0, lpt, ns0, bleb; avol, isbuf; err)⟩ (synced(avol0) ∧ adr = adr0 ∧ m = m0 ∧ nx = nx0 ∧ lpt0 = lpt ∧ avol0 ↓ avol ∧ ns = ns0) |