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Proof step 14 from proof fillsgn-fix (previous step)

n = n0 + # bytes ∧ # bytes ≤ n, # bytes < n, bytes2int(bytes) < 0 ⊦ mklist(i2b(~1), n0) + bytes = fix(n, bytes)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 15:
bytes2int(bytes) < 0 ⊦ mklist(i2b(~1), n0) + bytes = fix(n0 + # bytes, bytes), n0 = 0

Rule argument

Additional information

Used simplifier rules: ⊦ m + n = n + m;% ⊦ (m + n0) + n1 = m + n0 + n1;% ⊦ m < m + n ↔ n ≠ 0;% ⊦ m < n → m ≤ n;