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Proof step 1 from proof ladd (conclusion)

m ≠ 0 ⊦ ¬ log2(m + n) < log2 m

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
log2(m + n) < log2 m ⊦ m = 0, log2 m = 0

Rule argument

Additional information

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