QMaxSATpb: A Certified MaxSAT Solver

While certification has been successful in the context of satisfiablity solving, with most state-of-the-art solvers now able to provide proofs of unsatisfiability, in maximum satisfiability, such techniques are not yet widespread. In this paper, we present QMaxSATpb, an extension of QMaxSAT that can produce proofs of optimality in the VeriPB proof format, which itself builds on the well-known cutting planes proof system. Our experiments demonstrate that proof logging is possible without much overhead.