Function verify_annihilator 

pub fn verify_annihilator(truth: &[bool], w: &AnnihilatorWitness) -> bool

Re-check an AnnihilatorWitness against a truth table with zero trust in the producer: the witness is nonzero and vanishes on the required set (support of C, or of C ⊕ 1). Confirms the algebraic-immunity claim independently.