Shekel 5: best known minimum -10.15320, 30 seeds, 25000 evaluations at most per run, 80 particles
runs ending in the well at  PSO, global  PSO, ring
a1 = (4, 4, 4, 4)                    14         30
a2 = (1, 1, 1, 1)                     3          0
a3 = (8, 8, 8, 8)                     8          0
a4 = (6, 6, 6, 6)                     4          0
a5 = (3, 7, 3, 7)                     1          0
error below 1e-6                     13         30
evaluations (median)               7040      11760
