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Proof step 5 from proof denom-pos-01 (previous step)

rational(i, i0).num ≠ 0, rational(i, i0).denom ≤ 0 ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
rational(i, i0).denom ≤ 0 ⊦ rational(i, i0).num = 0

Rule argument

Additional information

Used simplifier rules: ⊦ j ≤ i ∧ i ≤ 0 → j ≤ 0; (forward)