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Proof step 53 from proof rightshift-8-01-01 (previous step)

0 = 2 ^ (8 * abs(j)) + i, 2 ^ (8 * abs(j) - 1) + i < 0, i < 0 ⊦ i % 2 ^ (8 * abs(j)) = 0, j = 0, i / 2 ^ (8 * abs(j)) = 0, int2bytes(i).first = i2b(~1)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 54:
⊦ j = i0 + j0 ↔ j - i0 = j0
Proof step 55:
0 - 2 ^ (8 * abs(j)) = i, 2 ^ (8 * abs(j) - 1) + i < 0, i < 0 ⊦ i % 2 ^ (8 * abs(j)) = 0, j = 0, i / 2 ^ (8 * abs(j)) = 0, int2bytes(i).first = i2b(~1)

Rule argument

seq: ⊦ j = i0 + j0 ↔ j - i0 = j0 subst: [j0, i0, j] → [i, 2 ^ (8 * abs(j)), 0] rotate: F spec: int-abs inst: name: add-rew

Additional information

Used terms: i, 2 ^ (8 * abs(j)), 0