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Levels of model 3 elements.
| Element | Reachability set | Antecedent set | Intersection set | Level |
|---|---|---|---|---|
| C1 | C1C2C3C4C5C6C7C8C9 | C1C2C3C4C5 | C1C2C3C4C5 | 2 |
| C2 | C1C2C3C4C5C6C7C8C9 | C1C2C3C4C5 | C1C2C3C4C5 | 2 |
| C3 | C1C2C3C4C5C6C7C8C9 | C1C2C3C4C5 | C1C2C3C4C5 | 2 |
| C4 | C1C2C3C4C5C6C7C8C9 | C1C2C3C4C5 | C1C2C3C4C5 | 2 |
| C5 | C1C2C3C4C5C6C7C8C9 | C1C2C3C4C5 | C1C2C3C4C5 | 2 |
| C6 | C6C7C8C9 | C1C2C3C4C5C6C7C8C9 | C6C7C8C9 | 1 |
| C7 | C6C7C8C9 | C1C2C3C4C5C6C7C8C9 | C6C7C8C9 | 1 |
| C8 | C6C7C8C9 | C1C2C3C4C5C6C7C8C9 | C6C7C8C9 | 1 |
| C9 | C6C7C8C9 | C1C2C3C4C5C6C7C8C9 | C6C7C8C9 | 1 |
