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Proof step 23 from proof fillsgn-short (previous step)

# bytes = 1, fillsgn(2, int2bytes(bytes2int(bytes))) = bytes, 1 ≤ # fillsgn(1, int2bytes(bytes2int(bytes))) ⊦ fillsgn(1, int2bytes(bytes2int(bytes))) = [], bytes = []

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 24:
⊦ # bytes = 1 ↔ bytes = bytes.first + []
Proof step 25:
bytes = bytes.first + [], fillsgn(2, int2bytes(bytes2int(bytes))) = bytes, 1 ≤ # fillsgn(1, int2bytes(bytes2int(bytes))) ⊦ fillsgn(1, int2bytes(bytes2int(bytes))) = [], bytes = []

Rule argument

seq: ⊦ # bytes = 1 ↔ bytes = bytes.first + [] subst: [bytes] → [bytes] rotate: F spec: list-data inst: bytelist name: lf-01

Additional information

Used terms: bytes