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Proof step 2 from proof mod-add1-negneg (previous step)

j < 0, j0 < 0, 0 < i ⊦ (j * 2 ^ i + j0) % 2 ^ i = j0 % 2 ^ i

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 3:
0 < i, j0 < 0, j < 0 ⊦ (j * 2 ^ i + j0) % 2 ^ i = j0 % 2 ^ i

Rule argument

Additional information

Used simplifier rules: forward-le-05: ⊦ i < j ∧ 0 ≤ i → 0 < j; (forward) from specification int-abs%forward-le-02: ⊦ j < i ∧ i ≤ 0 → j < 0; (forward) from specification int-abs