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Proof step 1 from proof longshiftzero-not-neg-01 (conclusion)

⊦ 0 ≤ i ∨ band(j, 63) ≠ 0 → ¬ i l>>> j < 0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
i l>>> j < 0, i < 0 ⊦ band(j, 63) = 0

Rule argument

Additional information

Used simplifier rules: longshiftzero-not-neg: ⊦ 0 ≤ i → ¬ i l>>> j < 0;% ⊦ j < i ∧ i ≤ 0 → j < 0; (forward)% ⊦ ¬ i ≤ j ↔ j < i;