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Proof step 7 from proof modeqp-copied (previous step)

i < i0, j0 < j, j1 < j, 0 ≤ j0, 0 ≤ j1, 0 < j ⊦ i * j + j0 < i0 * j + j1, i = i0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
i < i0, j0 < j, j1 < j, 0 ≤ j0, 0 ≤ j1, 0 < j, i0 * j + j1 ≤ i * j + j0 ⊦ i = i0

Rule argument

Additional information

Used simplifier rules: lels: ⊦ ¬ i < j ↔ j ≤ i; from specification int-abs