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Proof step 1 from proof fix-rec-pos (conclusion)

⊦ 0 ≤ b2i(bytes.first) ∧ # bytes < n ∧ bytes ≠ [] → fix(n, bytes) = i2b(0) ' + fix(n -1, bytes)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
0 ≤ b2i(bytes.first), # bytes < n ⊦ fix(n, bytes) = i2b(0) ' + fix(n - 1, bytes), bytes = []

Rule argument

Additional information

Used simplifier rules: ⊦ m < n → n ≠ 0;% ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j; (forward)% ⊦ m < n → n ≠ 0; (forward)% ⊦ n -1 = n - 1;