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Proof step 24 from proof int2bytes-rec255-neg (previous step)

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

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 25:
⊦ n = # bytes → lastn(n, bytes) = bytes
Proof step 26:
2 ≠ # int2bytes(i % 256), 2 ≤ # int2bytes(i % 256), i < 0, i < ~128 ⊦ lastn(2, int2bytes(i % 256)).rest = int2bytes(i % 256).last '
Proof step 39:
2 = # int2bytes(i % 256), 2 ≤ # int2bytes(i % 256), i < 0, i < ~128 ⊦ int2bytes(i % 256).rest = int2bytes(i % 256).last '

Rule argument

seq: ⊦ n = # bytes → lastn(n, bytes) = bytes subst: [bytes, n] → [int2bytes(i % 256), 2] rotate: F spec: list-del inst: bytelist name: lastN-all

Additional information

Used terms: int2bytes(i % 256), 2