Astra stands for Automatic Synthesis for Transducers. It contains the implementation of the algorithm presented in the FMCAD 22 paper Synthesizing Tranducers from Complex Specifications, as well as the experimental results.

This is a Maven project that depends on the symbolicautomata library. It also makes use of the Z3 and CVC4 SMT solvers.

First, build the symbolicautomata library following the directions on the repository page. Make sure that models and benchmarks project are in your working set so that Astra can find them. The easiest way to build both symbolicautomata and Astra is by opening them in Eclipse: go to import existing Maven project, and then click on update project.

The lib directory should include the dynamic libraries for z3 and the binary executable for cvc4.

z3 : You need to build z3 for JAVA api and copy your com.microsoft.z3.jar, libz3.dylib/so and libz3java.dylib/so into lib folder CVC4 : you need to build CVC4 and copy the binary file CVC4 into lib folder.

Finally, make sure that the LD_LIBRARY_PATH (on Linux) or DYLD_LIBRARY_PATH (on MacOS) includes the lib directory.

The synthesizer is in the src/main/java directory; the SMT encodings are in the subdirectory solver, while automata contains the implementation of symbolic transducers and operations on symbolic automata and transducers.

The benchmarks are in the src/test/java/benchmarks directory. The main set of benchmarks is in the Benchmarks subdirectory. To run this entire set of benchmarks, call the main function of RunBenchmarks.java. The results of running the benchmarks are written to the Outputs subdirectory.