| lpt[n, mklp(n0, n1, lpf, n2)][n3] = mklp(m, m3, lpf0, m4), lpt[n] = mklp(m0, m1, lpf, m2), n3 = n, ∀ n. n < # lpt ∧ lpt[n].flags = LP_FREE ↔ n ∈ freelist ⊦ n3 < # lpt ∧ lpf0 = LP_FREE ↔ n3 ∈ freelist, dups(freelist) |
lpt[n] = mklp(m0, m1, lpf, m2), lpt[n, mklp(n0, n1, lpf, n2)][n] = mklp(m, m3, lpf0, m4), ∀ n. n < # lpt ∧ lpt[n].flags = LP_FREE ↔ n ∈ freelist ⊦ n < # lpt ∧ lpf0 = LP_FREE ↔ n ∈ freelist, dups(freelist)