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Proof step 62 from proof rightshift-8-02 (previous step)

⊦ bytes2int(int2bytes(i).butlast) = bytes2int(fillsgn(2, int2bytes(i)).butlast), # int2bytes(i) = 1

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 63:
⊦ # bytes ≥ n → fillsgn(n, bytes) = bytes

Rule argument

name: fillsgn-longer rotate: F subst: [bytes, n] → [int2bytes(i), 2]

Additional information

Used simplifier rules: int2bytes-empty: ⊦ int2bytes(i) ≠ [];% ⊦ n ≥ m ↔ m ≤ n;% ⊦ ¬ m ≤ n ↔ n < m;% ⊦ n ≠ 1 → (n < 2 ↔ n = 0);% ⊦ # bytes = 0 ↔ bytes = []; Used terms: int2bytes(i), 2