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Proof step 1 from proof nonumsimp-twonle (conclusion)

⊦ m < n ∧ m0 ≤ n → ¬ 2 * n ≤ m + m0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
2 * n ≤ m + m0, m < n, m0 ≤ n ⊦ n = 0

Rule argument

Additional information

Used simplifier rules: f: ⊦ m < n → n ≠ 0; (forward) from specification nat-basic1