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Proof step 4 from proof int2bytes-len-fits (previous step)

# int2bits(i) % 8 = 0 ⊦ # bits2bytes(int2bits(i)) = # int2bits(i) / 8

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 5:
⊦ # bits % 8 = 0 ∧ bits ≠ [] → # bits2bytes(bits) = # bits / 8

Rule argument

name: bits2bytes-len-01 rotate: F subst: [bits] → [int2bits(i)]

Additional information

Used simplifier rules: ⊦ int2bits(j) ≠ []; Used terms: int2bits(i)