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Proof step 1 from proof sgn-07 (conclusion)

⊦ i < j + j0 → sgn(i - j0 + j) = ~1

Heuristic simplifier applied rule simplifier

And closed the goal!

Rule argument

Additional information

Used simplifier rules: sgn-06: ⊦ i < j → sgn(i - j) = ~1;%add-c: ⊦ i + j = j + i; from specification int-basic2