| # buf = # buf0, # buf1 = EB_PAGE_SIZE, # lpt = # avol, avol[m3] = mapped(buf2), buf0 = buf3, err = err0, n0 = 0, m3 < # avol, ebm-vol-inv(avol), range=(buf0, 0, buf, 0, n0), range=(buf0, n0 + n, buf, n0 + n, # buf0 - n0 + n), m0 + n ≤ LEB_SIZE, n ≤ # buf3, bleb ≠ nobuffer → bleb.leb < # avol ∧ wbuf-cons(mkwbuf(buf1, m5, m4), avol[bleb.leb], rofs), ⌊err0⌋ ∨ err0 = ESUCCESS ⊦ ⟪skip⟫ true, err = ESUCCESS |