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Proof step 2 from proof fillsgn-not-empty (previous step)

fillsgn(n, int2bytes(i)) = [] ⊦

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ # bytes ≠ # bytes0 → bytes ≠ bytes0
Proof step 4:
¬ # fillsgn(n, int2bytes(i)) ≠ # [], fillsgn(n, int2bytes(i)) = [] ⊦

Rule argument

seq: ⊦ # bytes ≠ # bytes0 → bytes ≠ bytes0 subst: [bytes0, bytes] → [[], fillsgn(n, int2bytes(i))] rotate: F spec: list-data inst: bytelist name: length-neq

Additional information

Used terms: [], fillsgn(n, int2bytes(i))