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Proof step 6 from proof leone-two (previous step)

i = i0 * 2 + j0 ∧ 0 ≤ j0 ∧ j0 < 2 ∧ 0 < 2, 0 ≤ i ⊦ i0 ≤ 1 ↔ i ≤ 3

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 7:
j0 < 2, 0 ≤ j0, 0 ≤ i0 ⊦ i0 ≤ 1 ↔ i0 * 2 + j0 ≤ 3

Rule argument

Additional information

Used simplifier rules: forward-le-05: ⊦ i < j ∧ 0 ≤ i → 0 < j; (forward) from specification int-abs%forward-le-01: ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j; (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