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Proof step 5 from proof int2bytes-rec255-neg (previous step)

i < ~128, i < 0 ⊦ fix(2, int2bytes(i % 256)).rest = int2bytes(i % 256).last '

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 6:
⊦ # bytes ≥ n → fix(n, bytes) = lastn(n, bytes)
Proof step 7:
¬ # int2bytes(i % 256) ≥ 2, i < ~128, i < 0 ⊦ fix(2, int2bytes(i % 256)).rest = int2bytes(i % 256).last '
Proof step 23:
# int2bytes(i % 256) ≥ 2, i < ~128, i < 0 ⊦ lastn(2, int2bytes(i % 256)).rest = int2bytes(i % 256).last '

Rule argument

name: fix-longer rotate: F subst: [bytes, n] → [int2bytes(i % 256), 2]

Additional information

Used terms: int2bytes(i % 256), 2