m0 + n0 ≤ m0 + n1, m < m0 + n0, n0 ≤ n1, m0 + n1 ≤ m ⊦ m0 + n0 ≤ m, m0 + n0 = 0
Used simplifier rules: ls-le-simp: ⊦ m < n → (n ≤ m ↔ false); Used formulas: m0 + n0 ≤ m