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Proof step 10 from proof div-add-neg (previous step)

i2 < j, 1 + i2 * j < j, i2 ≤ 0, i2 < 0, j0 < j, i1 * j + j0 < j, (i1 * j + j0) + 1 < j, j0 ≤ 0, abs(j0) < j, 0 < j, i1 * j + j0 < 0, i2 + 1 < j ⊦ ((i2 + i1) * j + j0) / j = i1 + i2

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: int-div inst: name: diveq-neg seq: i0 * j + j0 < 0, i0 < 0, j0 ≤ 0, abs(j0) < j ⊦ (i0 * j + j0) / j = i0 subst: [j0, j, i0] → [j0, j, i1 + i2] flags: rewrite, current

Additional information

Used simplifier rules: lels: ⊦ ¬ i < j ↔ j ≤ i; from specification int-abs%forward-lsle: ⊦ i < j ∧ j ≤ j0 → i < j0; (forward) from specification int-abs%forward-lele: ⊦ j ≤ j0 ∧ j0 ≤ j1 → j ≤ j1; (forward) from specification int-abs%ls-01: ⊦ i + j < i + i0 ↔ j < i0; from specification int-basic2%ls-pos: ⊦ 0 < i → (i * j < i * j0 ↔ j < j0); from specification int-mult%ls-02: ⊦ i < i + j ↔ 0 < j; from specification int-basic2%ls-01: ⊦ i < j → ¬ j < i; from specification int-basic1%add-a: ⊦ i + j + i0 = (i + j) + i0; from specification int-basic2%associativity: ⊦ i * j * j0 = (i * j) * j0; from specification int-mult%commutativity: ⊦ i * j = j * i; from specification int-mult%lep: ⊦ i ≤ i + j ↔ 0 ≤ j; from specification int-abs%modzero: ⊦ 0 < i ∧ abs(j0) < j → ¬ i * j + j0 < 0; from specification int-mult%add-c: ⊦ i + j = j + i; from specification int-basic2 Used terms: j0, j, i1 + i2