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Proof step 1 from proof minus-one (conclusion)

⊦ i < 0 → (~2 < i ↔ i = ~1)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
i < 0, ~2 < i ⊦ i = ~1

Rule argument

Additional information

Used simplifier rules: trans: ⊦ i < j ∧ j < j0 → i < j0;