| ∃ lpt, log, orphans. persistence-io-inv(sb, logoff, avol, lpt, log, orphans), m = EB_PAGE_SIZE, m0 = LEB_SIZE, ebm-vol-inv(avol) ⊦ ⟪persistence_io_add_log_leb#(m1, sb, m, m0; logoff, avol; err)⟫ ((∃ lpt, log, orphans. persistence-io-inv(sb, logoff, avol, lpt, log, orphans)) ∧ ebm-vol-inv(avol)) |