This article puts forward the application of Counterexample Guided Abstraction Refinement
(CEGAR) in solving the well-known PSPACE-complete problem of quantified Boolean …

Pseudo-Boolean and cardinality constraints are a natural generalization of clauses. While a
clause expresses that at least one literal must be true, a cardinality constraint expresses that …

Quantified Boolean formulae (QBF) allow compact encoding of many decision problems.
Their importance motivated the development of fast QBF solvers. Certifying the results of a …

Solvers for quantified Boolean formulas (QBF) have become powerful tools for tackling hard
computational problems from various application domains, even beyond the scope of SAT …

In recent years, bit-precise reasoning has gained importance in hardware and software
verification. Of renewed interest is the use of symbolic reasoning for synthesising loop …

Algorithms based on the enumeration of implicit hitting sets find a growing number of
applications, which include maximum satisfiability and model based diagnosis, among …

This article introduces and studies a proof system∀ Exp+ Res that enables us to refute
quantified Boolean formulas (QBFs). The system∀ Exp+ Res operates in two stages: it …

Word problems are an established technique for teaching mathematical modeling skills in K-
12 education. However, many students find word problems unconnected to their lives …

Quantified Boolean formulas (QBF) are a generalization of propositional formulas by
allowing universal and existential quantifiers over variables. This enhancement makes QBF …

LNAI 3632 - sKizzo: A Suite to Evaluate and Certify QBFs Page 1 sKizzo: A Suite to Evaluate
and Certify QBFs Marco Benedetti Istituto per la Ricerca Scientifica e Tecnologica (IRST), Via …