| wbuf-cons(bleb, wbuf, avol, rofs), ebm-vol-inv(avol), # lpt = # avol, ¬ rofs → bleb = buffered(m) ∨ (bleb = nobuffer ∨ wbuf.nbytes = 0) ∧ m < # avol ∧ avol[m].mapped? ∧ m0 = # avol[m].data ⊦ ⟪wbuf_add_log_leb#(m, m0, rofs, adr, m1, avol, lpt, ns; bleb, wbuf, plog; err)⟫ wbuf-cons(bleb, wbuf, avol, rofs) |