Function explore_and_minimize_race 

pub fn explore_and_minimize_race(
    program: &Program,
    base: ExecConfig,
    kernarg: &[u8],
    arena_len: usize,
    seed: u64,
    max_trials: u32,
) -> Result<ExploreReport>

Bounded seeded search for a SoftGPU ordering/race defect, then minimize WG size.