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Proof step 1 from proof band-011x-01 (conclusion)

⊦ 0 < b2i(by) → ¬ 128 ≤ band(255, b2i(by))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
128 ≤ band(255, b2i(by)), 0 < band(255, b2i(by)), 0 ≤ band(255, b2i(by)), 0 < b2i(by) ⊦

Rule argument

Additional information

Used simplifier rules: ⊦ i ≤ j ∧ 0 < i → 0 < j; (forward)% ⊦ i ≤ j ∧ 0 ≤ i → 0 ≤ j; (forward)% ⊦ i < j ∧ 0 ≤ i → 0 < j; (forward)