| # buf = EB_PAGE_SIZE, # lpt0 = # avol, # avol0 = # avol, rofs ↔ true, adr = adr0, bleb = bleb0, bleb0 = bleb1, lpt = lpt0, m = m0, ns = ns0, plog = plog0, abs(avol, bleb1, mkwbuf(buf, m2, m1), avol0, true), awbuf-inv(avol, bleb1), ebm-vol-inv(avol0), synced(avol), bleb1 ≠ nobuffer → bleb1.leb < # avol ∧ wbuf-cons(mkwbuf(buf, m2, m1), avol0[bleb1.leb], true) ⊦ ⟨if synced(avol) then if rofs then err := EROFS else bleb := nobuffer, err := ESUCCESS else abort⟩ (bleb = bleb1 ∧ EROFS = err) |
# avol0 = # avol, # lpt0 = # avol, # buf = EB_PAGE_SIZE, rofs ↔ true, adr = adr0, bleb = bleb0, bleb0 = bleb1, lpt = lpt0, m = m0, ns = ns0, plog = plog0, abs(avol, bleb1, mkwbuf(buf, m2, m1), avol0, true), awbuf-inv(avol, bleb1), ebm-vol-inv(avol0), synced(avol), bleb1 ≠ nobuffer → bleb1.leb < # avol ∧ wbuf-cons(mkwbuf(buf, m2, m1), avol0[bleb1.leb], true) ⊦ ⟨if rofs then err := EROFS else bleb := nobuffer, err := ESUCCESS⟩ (bleb = bleb1 ∧ EROFS = err)