Unrealizable cores for reactive systems specifications: artifact

This document describes the artifact that accompanies the ICSE'21 paper Unrealizable Cores for Reactive Systems Specifications. The artifact includes the specifications that were used in the experiments that are described in the paper. It further includes an executable that allows interested readers to reproduce these experiments and inspect their results. Additionally, the executable is applicable to any specification in Spectra format, which allows conducting similar experiments over any Spectra specification. We hope the artifact will be useful for researchers who are interested in reactive synthesis, specifically in different means to deal with unrealizable specifications.