| wlar[m] = wl-entry(m2, stat), wlar[m0] = wl-entry(m3, stat0), stat0 = used, m0 + 1 < # wlar, m < # wlar, m0 < m, m0 < # wlar, m3 ∈ used-ecs(wlar, m) ⊦ # used-ecs(wlar, m) = 0, stat = used, used-ecs(wlar, m) = ∅, ∃ m1. ¬ m < m1 ∧ wlar[m1].status = used ∧ wlar[m1].ec = m3 |
wlar[m0] = wl-entry(m3, used), wlar[m] = wl-entry(m2, stat), m0 < # wlar, m0 < m, m < # wlar, m0 + 1 < # wlar, m3 ∈ used-ecs(wlar, m) ⊦ # used-ecs(wlar, m) = 0, stat = used, used-ecs(wlar, m) = ∅, ∃ m1. ¬ m < m1 ∧ wlar[m1].status = used ∧ wlar[m1].ec = m3