Bottom-Two-Runoff Instant Runoff PUT

Violation of Negative Involvement

Profile type: Profile
Config: 3 c, 6 v
Parameters: check_probabilities=True

1 wins in the full profile, but 1 is a loser after removing a voter with the ranking (0, 2, 1):

Full profile
+---+---+---+---+
| 2 | 1 | 1 | 2 |
+---+---+---+---+
| 0 | 1 | 1 | 2 |
| 2 | 0 | 2 | 1 |
| 1 | 2 | 0 | 0 |
+---+---+---+---+
Profile([[0, 2, 1], [1, 0, 2], [1, 2, 0], [2, 1, 0]], rcounts=[2, 1, 1, 2], cmap={0: '0', 1: '1', 2: '2'})
Bottom-Two-Runoff Instant Runoff PUT winners are {0, 1, 2}

Profile with voter removed
+---+---+---+---+
| 1 | 1 | 1 | 2 |
+---+---+---+---+
| 0 | 1 | 1 | 2 |
| 2 | 0 | 2 | 1 |
| 1 | 2 | 0 | 0 |
+---+---+---+---+
Profile([[0, 2, 1], [1, 0, 2], [1, 2, 0], [2, 1, 0]], rcounts=[1, 1, 1, 2], cmap={0: '0', 1: '1', 2: '2'})
Bottom-Two-Runoff Instant Runoff PUT winner is {2}