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This directory contains a "minimal" implementation to demonstrate the basic ideas of symbolic execution and concolic execution, using Z3's Python interface. You should read the KLEE and the SAGE papers listed on the CSE 551 webiste. * Install Z3/Python first: https://github.com/Z3Prover/z3 * (optional) Install Pygments: pip install Pygments * Symbolic execution: run test_me.py. * Check the implementation: sched_fork() in mc.py. * Concolic execution: comment out the "test_me(x, y)" line, uncomment the next "mc_fuzz(...)" line, and run test_me.py. * Check the implementation: mc_fuzz() and sched_flip() in mc.py. * Try one more example: run bad.py. * Run equivalence checking examples: ffs_eqv.py and mod_eqv.py. Thanks to James Bornholt for the feedback.