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Proof step 18 from proof rightshift-8-02 (previous step)

int2bytes(i) = by ', 0 ≤ i ⊦ i >> 8 = 0

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 19:
⊦ 0 ≤ i ∧ 0 ≤ j → i >> j = i / 2 ^ j
Proof step 20:
0 ≤ i ∧ 0 ≤ 8, int2bytes(i) = by ', 0 ≤ i ⊦ i / 2 ^ 8 = 0

Rule argument

seq: ⊦ 0 ≤ i ∧ 0 ≤ j → i >> j = i / 2 ^ j subst: [j, i] → [8, i] rotate: F spec: intops inst: name: shiftright-pos-div

Additional information

Used simplifier rules: ⊦ ¬ i ≤ j ↔ j < i;% ⊦ i ≤ j → (¬ ¬ j < i ↔ false); Used terms: 8, i