Question

I’m interested in playing around with the MaxSAT/MaxSMT c example (specifically, maxsat.c) provided on the z3 (Microsoft Research) website. Using Visual Studio 2010, I eventually got the example to compile (using a fresh install of z3 4.0). However, I can’t get any of my (SMT 2.0) models to run using them. Further, I cannot get the example posted in this question to work either.

In the first case, my compiled program crashes when it tries to call Z3_get_smtlib_num_formulas in get_hard_constraints of the file. I don’t know why, instead, I get the standard windows 7 “this program has stopped working” popup.

In the second case, it reports unsupported ;benchmark.

In order to help me to get this work, I was wondering if
(a) Has anyone had similar issues when compiling this code, and if so, how did you resolve them?
or
(b) How can I debug either compilation of the file (assuming it is correct)? Namely, can someone enumerate the correct libraries (and library versions – e.g., z3 4.0?) to include in the compiler options to get this example working?

In either case, information on the error reported in the second case would also be appreciated: what does it mean exactly? The keyword was not valid? That the SMT input is the wrong version? Or something else?

Thanks.

Answer 1

The MaxSAT example has not been updated to SMTLIB 2.0 yet. It uses the function Z3_parse_smtlib_file to parse the input, which means that it supports only SMTLIB 1.0 at the moment.

This example is distributed alongside Z3, i.e., you should have received a copy in Z3-4.0/examples/maxsat/, which also contains compilation and execution scripts.

Compilation should be straight-forward by running build.cmd in a Visual Studio Command Prompt, or build.sh on Linux.