optimaltree hangs on edge case with all costs equal to 1
#403
| Job | Run time |
|---|---|
| 2m 35s | |
| 3m 2s | |
| 3m 33s | |
| 3m 47s | |
| 5m 15s | |
| 2m 25s | |
| 2m 58s | |
| 3m 22s | |
| 3m 34s | |
| 4m 48s | |
| 3m 44s | |
| 3m 46s | |
| 7m 16s | |
| 5m 0s | |
| 4m 58s | |
| 0s | |
| 1h 0m 3s |