One also may bias values to be similar (or equal) to other recently generated values. This was a trick used in the compiler tester yarpgen, where it was useful in testing optimization of bitwise operators on integers.

https://github.com/intel/yarpgen

https://github.com/intel/yarpgen/blob/main/papers/yarpgen-oo...

(see "Policies for constants", page 196:8.)