constraints | cost of the opt | # of iterations | # of computed hierarchies |
| no solution | 776 | 1279 |
| 38 | 6213 | 14,334 |
| 38 | 6213 | 14,334 |
| 38 | 22,409 | 78,206 |
| 38 | 22,409 | 78,206 |
| 38 | 72,615 | 267,228 |