NSGA-II  after 250 generations: 100 solutions, IGD+ 0.0087, hypervolume 0.8605
NSGA-II  after 500 generations: 100 solutions, IGD+ 0.0031, hypervolume 0.8706
SMS-EMOA after 250 generations: 100 solutions, IGD+ 0.0058, hypervolume 0.8655
SMS-EMOA after 500 generations: 100 solutions, IGD+ 0.0028, hypervolume 0.8711
the whole front: hypervolume 0.8767
