Building a Problem Library for First-Order Modal Logics

First-order modal logics have many applications, e.g. in planning and program verification. Whereas comprehensive and standardized problem libraries exist for, e.g., classical (TPTP library) and intuitionistic (ILTP library) logic, nothing comparable is so far available for firstorder modal logics. The aim of the Quantified Modal Logic Theorem Proving (QMLTP) library is to close this gap by providing a comprehensive set of problems for various first-order modal logics. We present a preliminary version of this library, which includes 200 problems represented in an extended TPTP syntax. The main purpose of the QMLTP library is to put the testing and evaluation of automated theorem proving (ATP) systems for first-order modal logic on a firm basis, make meaningful system evaluations and comparison possible, and to measure practical progress in ATP for modal logics. We would like to invite all interested users to submit problems and ATP systems for first-order modal logics.