###NICE Symbolic Execution for Python (Z3)

This code is a port of the NICE project's (http://code.google.com/p/nice-of/) symbolic execution engine for Python to use the Z3 theorem prover (http://z3.codeplex.com). The port removes all the NICE-specific dependences, platform-specific code, and makes various improvements so the code base can be used by students or anyone wanting to experiment with dynamic symbolic execution.

###Setup instructions:

• Make sure that you use Python 32-bit (64-bit) if-and-only-if you use the Z3 32-bit (64-bit) binaries. Testing so far has been for 32-bit binaries only.
• Install Python version 2.7.6 (https://www.python.org/download/releases/2.7.6/)
• Install Z3 to directory Z3HOME from http://z3.codeplex.com/releases (click on the "Planned" link on the right to get the latest binaries for all platforms)
• Add Z3HOME\bin to PATH and PYTHONPATH
• MacOS: see setup.sh for Homebrew default locations for Python and Z3

1. Grab yourself a Brew at http://brew.sh/
2. Get the newest python or python3 version: brew install python
3. Have the system prefer brew python over system python: echo export PATH='/usr/local/bin:$PATH' >> ~/.bash_profile -
4. Get z3: brew install homebrew/science/z3
5. Clone this repository: git clone https://github.com/thomasjball/PyExZ3.git
6. Set the PATH: . PyExZ3/setup.sh (do not run the setup script in a subshell ./ PyExZ3/)

• "python run_tests.py test" should pass all tests
• "python sym_exec.py test\FILE.py" to run a single test from test directory