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Proof step 5 from proof associativity (previous step)

j1 = i0 +1, ∀ i, j. i * j * j1 = (i * j) * j1 ⊦ i * j * i0 = (i * j) * i0

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Rule argument

Additional information

Used simplifier rules: succ-01: ⊦ i +1 = i + 1; from specification int-basic2