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Proof step 67 from proof fix-bits2bytes-01 (previous step)

# bits = 8 * n0, n0 ≤ # bits2bytes(bits) ⊦ n0 = 0, bits = [], lastn(n0, bits2bytes(bits)) = bits2bytes(bits)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 68:
⊦ n = # bytes → lastn(n, bytes) = bytes
Proof step 69:
n0 ≠ # bits2bytes(bits), # bits = 8 * n0, n0 ≤ # bits2bytes(bits) ⊦ n0 = 0, bits = [], lastn(n0, bits2bytes(bits)) = bits2bytes(bits)

Rule argument

seq: ⊦ n = # bytes → lastn(n, bytes) = bytes subst: [bytes, n] → [bits2bytes(bits), n0] rotate: F spec: list-del inst: bytelist name: lastN-all

Additional information

Used terms: bits2bytes(bits), n0