This book constitutes the refereed proceedings of the 20th International Conference on Theory
and Applications of Satisfiability Testing SAT 2017 held in Melbourne Australia in August
September 2017. The 22 revised full papers 5 short papers and 3 tool papers were carefully
reviewed and selected from 64 submissions. The papers are organized in the following topical
sections: algorithms complexity and lower bounds clause learning and symmetry handling
maximum satisfiability and minimal correction sets parallel SAT solving quantified Boolean
formulas satisfiability modulo theories and SAT encodings.