License

Copyright (c) 2016, Johns Hopkins University Applied Physics Laboratory All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

About

Exterminator is a proof of concept user interface for the SLMech program verification tool. Exterminator is intended to provide a familiar debugger-like interface for stepping through a program proof using the SLMech proof tactics. Our motivation is the observation that while programming, developers often construct informal correctness proofs in their heads then use traditional debuggers to validate their belief on individual runs of a program. Exterminator seeks to extend this by allowing developers to step through all program runs simultaneously in the form of logical assertions. In short, we view Exterminator as "like a debugger, but more so."

Exterminator is in a very nascent state. It is able to load simple SLMech programs and step through the proofs. It recognizes some assertions about heap and store variables and attempts to simplify them into a view similar to that used to inspect the heap or stack in a standard debugger. It also includes a simple proof editing capability.

Planned enhancements include:

• Improved recognition of heap/store assertions
• Tactic navigation and suggestion
• Graphical depiction of heap decomposition
• Mode options for detailed vs. simplified display
• Support for Coq 8.5

Dependencies

Exterminator is written in Java and uses Maven to build. It depends on:

• Java 7
• Maven 3
• Antlr 4.5
• Swing 1.6.1
• JUnit 4.12 (for tests)
• SLMech
• Coq 8.4

Building

$ mvn package -DskipTests

Running

$ java -jar ./target/exterminator-0.1.jar