Bottom-Two-Runoff Instant Runoff PUT

Violation of Immunity to Spoilers

Profile type: Profile
Config: 3 c, 12 v
Parameters: ∅

Immunity to Spoilers violation for Bottom-Two-Runoff Instant Runoff PUT.
0 wins without 1 in the election and is majority preferred to 1 but both lose when 1 is included:
+---+---+---+---+
| 3 | 3 | 2 | 4 |
+---+---+---+---+
| 0 | 1 | 1 | 2 |
| 2 | 0 | 2 | 0 |
| 1 | 2 | 0 | 1 |
+---+---+---+---+
Profile([[0, 2, 1], [1, 0, 2], [1, 2, 0], [2, 0, 1]], rcounts=[3, 3, 2, 4], cmap={0: '0', 1: '1', 2: '2'})
Winners in full election: [2]
Winners in election without 1: [0, 2]