[FEATURE] UNSAT Verification

[hadarshavit]

Is your feature request related to a problem? Please describe.
N / A
Describe the solution you'd like
Currently, sparkle has functionality to verify SAT results. However, in recent years, UNSAT verification is mandatory in SAT Competitions. Add an option in sparkle to verify UNSAT proofs.

Describe alternatives you've considered
Not verifying UNSAT proofs. Some users might be interested in UNSAT proofs as well as they are increasingly becoming "part of SAT solving"

Additional context
https://satcompetition.github.io/2024/output.html (Certificates of Unsatisfiablity section)

[thijssnelleman]

Agreed, currently present in Sparkle settings file but this makes no sense. Should be present on Solver level, s.t. the verifier is always given when a solver is loaded. Would also allow for different verifiers in different solvers if needed. Will try to add in tomorrow