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Proof step 3 from proof square-int-nlz (previous step)

dec = mkDecimal(i, i0), (dec * dec).int < 0 ⊦

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
(mkDecimal(i, i0) * mkDecimal(i, i0)).int < 0 ⊦

Rule argument

Additional information

Used simplifier rules: forward-le-02: ⊦ j < i ∧ i ≤ 0 → j < 0; (forward) from specification int-abs