Rename prior_ibm to prior_wiener_integrated and simplify the initial state
#1489
| Job | Run time |
|---|---|
| 5m 15s | |
| 23s | |
| 2m 23s | |
| 30s | |
| 2m 48s | |
| 26s | |
| 10m 14s | |
| 2m 54s | |
| 2m 48s | |
| 27m 41s |