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Proof step 2 from proof fix-butlast-longer (previous step)

# bytes < n ⊦ bytes = [], # bytes = 1, fix(n, bytes.butlast) = fix(n, bytes).first ' + fix(n, bytes).butlast

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 3:
⊦ # bytes < n → fix(n, bytes) = fillsgn(n, bytes)
Proof step 4:
# bytes < n, # bytes < n ⊦ bytes = [], # bytes = 1, fix(n, bytes.butlast) = fillsgn(n, bytes).first ' + fillsgn(n, bytes).butlast

Rule argument

name: fix-fillsgn rotate: F subst: [bytes, n] → [bytes, n]

Additional information

Used terms: bytes, n