Hi, I'm trying to implement a symbolic solver using `oxidd`, but this requires some variable substitution here and there. For example, if we have the following:
```rust
// Create two sets of `n_vari…
Currently, the `ptr_uint64` class has the number of bits for the label set to *24* (similar as *Sylvan*). Yet, after the change #475, we have removed another bit from the level index. This decreases t…