Concolic Execution for Django Applications

Concolic execution systems allow developers to verify that invariants in their applications are not violated no matter what input is given by a user. This was demonstrated in Lab 3, where the Z3 solver was used to find inputs that would trigger inconsistencies in Zoobar balances. Unfortunately, the lab’s framework is written specifically for Zoobar, and would therefore not work for other applications without substantial modifications. Invariant checking is useful for a wide range of applications, and thus we decided to make our 6.858 final project building a generic concolic execution interface for any Django-based web application.