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Proof step 6 from proof div-mult-02 (previous step)

i = i2 * j + j1 ∧ 0 ≤ j1 ∧ j1 < j, i * i0 = i1 * j * i0 + j0, j0 < j * i0, 0 ≤ j0, 0 ≤ i, 0 < j, 0 < i0 ⊦ i1 = i2

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
(i2 * j + j1) * i0 = i1 * j * i0 + j0, 0 < i0, 0 ≤ j1, j1 < j, j0 < j * i0, 0 ≤ j0, 0 ≤ i2, 0 < j ⊦ i1 = i2

Rule argument

Additional information

Used simplifier rules: forward-lels: ⊦ i ≤ j ∧ j < j0 → i < j0; (forward) from specification int-abs%add-c: ⊦ i + j = j + i; from specification int-basic2%add-a: ⊦ i + j + i0 = (i + j) + i0; from specification int-basic2%commutativity: ⊦ i * j = j * i; from specification int-mult%associativity: ⊦ i * j * j0 = (i * j) * j0; from specification int-mult%zero-ge-add: ⊦ 0 ≤ j1 ∧ j1 < j → (0 ≤ i0 * j + j1 ↔ 0 ≤ i0); from specification int-mult