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Proof step 1 from proof succ-05 (conclusion)

⊦ n + 1 < m → m - n - 1 ≠ 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
m - n - 1 = 0, n + 1 < m ⊦ m = 0

Rule argument

Additional information

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