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Proof step 7 from proof countrefs-le-02 (conclusion)

⊦ 0 < i ∧ ints ≠ [] → ¬ countrefs(i ' + ints) ≤ countrefs(ints)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
countrefs(i ' + ints) ≤ countrefs(ints), 0 < i ⊦ ints = []

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPFORWARD : ⊦ i < j ∧ 0 ≤ i → 0 < j])]]