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Levels of model 1 elements.
| Element | Reachability set | Antecedent set | Intersection set | Level |
|---|---|---|---|---|
| A1 | A1A3A5A7A8 | A1 | A1 | 4 |
| A2 | A2A3A4A5A6A7A8 | A2 | A2 | 4 |
| A3 | A3A5A7A8 | A1A2A3 | A3 | 3 |
| A4 | A4A6A7A8 | A2A4 | A4 | 3 |
| A5 | A5A7A8 | A1A2A3A5 | A5 | 2 |
| A6 | A6A7A8 | A2A4A6 | A6 | 2 |
| A7 | A7A8 | A1A2A3A4A5A6A7A8 | A7A8 | 1 |
| A8 | A7A8 | A1A2A3A4A5A6A7A8 | A7A8 | 1 |
