https://github.com/RoboticExplorationLab/Algames.jl/blob/c82e8b232df1530695c165c95149ab6c09f55c34/src/problem/solver_methods.jl#L12 I think you should not be changing the global random seed as a library (causes issues in user code). Should use your own rng with `MersenneTwister`.