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Proof step 4 from proof fix-rec-pos (previous step)

¬(# bytes < n ∧ 0 ≤ bytes2int(bytes)), 0 ≤ b2i(bytes.first), # bytes < n ⊦ fix(n, bytes) = i2b(0) ' + fix(n - 1, bytes), bytes = []

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
bytes2int(bytes) < 0, # bytes < n, 0 ≤ b2i(bytes.first) ⊦ bytes = [], fix(n, bytes) = i2b(0) ' + fix(n - 1, bytes)

Rule argument

Additional information

Used simplifier rules: ⊦ i < 0 ∧ 0 ≤ j → i < j;% ⊦ j < i ∧ i ≤ 0 → j < 0; (forward)% ⊦ i < j ∧ j ≤ j0 → i < j0; (forward)% ⊦ ¬ i ≤ j ↔ j < i;% ⊦ m < n → (n ≤ m ↔ false);% ⊦ ¬ m < n ↔ n ≤ m;