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Proof step 11 from proof int2bytes-fillsgn-rec (previous step)

# int2bytes(i >> 8) < n, # int2bytes(i >> 8) + 1 < n, i < ~128 ∨ 128 ≤ i ⊦ fillsgn(n, int2bytes(i >> 8) + i2b(i) ') = fillsgn(n - 1, int2bytes(i >> 8)) + i2b(i) ', n = # int2bytes(i >> 8) + 1

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 12:
⊦ # bytes < n ∧ bytes2int(bytes) < 0 → fillsgn(n, bytes) = mklist(i2b(~1), n - # bytes) + bytes
Proof step 13:
¬(# int2bytes(i >> 8) < n - 1 ∧ bytes2int(int2bytes(i >> 8)) < 0), # int2bytes(i >> 8) < n, # int2bytes(i >> 8) + 1 < n, i < ~128 ∨ 128 ≤ i ⊦ fillsgn(n, int2bytes(i >> 8) + i2b(i) ') = fillsgn(n - 1, int2bytes(i >> 8)) + i2b(i) ', n = # int2bytes(i >> 8) + 1
Proof step 27:
# int2bytes(i >> 8) < n - 1 ∧ bytes2int(int2bytes(i >> 8)) < 0, # int2bytes(i >> 8) < n, # int2bytes(i >> 8) + 1 < n, i < ~128 ∨ 128 ≤ i ⊦ fillsgn(n, int2bytes(i >> 8) + i2b(i) ') = (mklist(i2b(~1), n - 1 - # int2bytes(i >> 8)) + int2bytes(i >> 8)) + i2b(i) ', n = # int2bytes(i >> 8) + 1

Rule argument

name: fillsgn-neg rotate: F subst: [bytes, n] → [int2bytes(i >> 8), n - 1]

Additional information

Used terms: int2bytes(i >> 8), n - 1