| # avol0 = # avol1, # lpt0 = # avol1, # buf = EB_PAGE_SIZE, adr = adr0, adr1 = adr0, avol = avol1, avol2 = avol0, lpt = lpt0, lpt1 = lpt0, m = m0, m3 = m0, ns = ns0, ns1 = ns0, plog = plog0, plog1 = plog0, abs(avol1, bleb, mkwbuf(buf, m2, m1), avol0, rofs0), awbuf-inv(avol1, bleb), ebm-vol-inv(avol0), bleb ≠ nobuffer → bleb.leb < # avol1 ∧ wbuf-cons(mkwbuf(buf, m2, m1), avol0[bleb.leb], rofs0) ⊦ ⟨rofs := ?⟩ (rofs1 ↔ rofs) |