NSGA-II  after 250 generations: 100 solutions, IGD+ 1.2545, hypervolume 0.9557
NSGA-II  after 2500 generations: 100 solutions, IGD+ 0.3793, hypervolume 4.7459
SMS-EMOA after 250 generations: 44 solutions, IGD+ 1.3758, hypervolume 0.5557
SMS-EMOA after 2500 generations: 100 solutions, IGD+ 0.4514, hypervolume 4.3713
the closest front, 0.0695 away: IGD+ 0.0868, hypervolume 6.2985 with 100 points
the whole front: hypervolume 6.7857
