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Proof step 79 from proof setInt-theorem (previous step)

i >> 16 = ~1, b2i(i2b(i >> 8)) < 0, i < ~128, i < 0 ⊦ i = b2i(i2b(i)), i2b(~1) = i2b(b2i(i2b(i >> 8)) >> 16)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 80:
⊦ b2i(by) < 0 ∧ 8 ≤ j → b2i(by) >> j = ~1

Rule argument

spec: byte inst: name: shiftright-byte-8-neg-01 seq: ⊦ b2i(by) < 0 ∧ 8 ≤ j → b2i(by) >> j = ~1 subst: [j, by] → [16, i2b(i >> 8)] flags: rewrite

Additional information

Used simplifier rules: zero-gels-01: ⊦ i < 0 ∧ 0 ≤ j → i < j; from specification int-abs Used terms: 16, i2b(i >> 8)