Skip to content


Switch branches/tags

Name already in use

A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?

Latest commit


Git stats


Failed to load latest commit information.
Latest commit message
Commit time

The Care and Feeding of Wild-Caught Mutants -- Artifact

This artifact provides the toolchain used in the paper and implements a small subset of the experimentation performed in the paper; the subset used is necessary for artifact submission as the experiment as performed for the paper required tens of thousands of hours of processor time (and as such was executed on a high-throughput computing platform).

Important files and directories

  • The Care and Feeding of Wild-Caught Mutants - The paper as submitted
  • Dockerfile - A Dockerfile which, when built, compiles the toolchain and runs the experiment subset
  • Wild-Caught Mutant Demo video - A narrated video showing a brief demo of the toolchain
  • - A bash script which executes a subset of the experiment; this should work on most Linux systems (see below), but for evaluation of the artifact using the Docker instance is strongly preferred
  • code - Source code for the Wild-Caught Mutants toolchain
  • github_scrape - A subset of the source control repository revision histories utilized in the experiment (specifically, the Linux kernal revision history is omitted for space and time concerns)

Instructions for use

A Dockerfile is provided to automate the process of executing the experimental subset. Building the Docker instance from the Dockerfile (e.g., docker build . from the artifact's root directory, sudo use often required) will automatically run the experiment script and display the results.

The toolchain (mutgen and mutins) can be built from the code directory with make.

The experimental subset (which builds the toolchain, harvests a set of mutants, and performs a subset of the paper's experimentation) is performed by the script. The experimental subset performed by this script is chosen to take roughly half an hour on typical desktop hardware.


We have noticed some unusual behavior with the test suites when using certain versions of gcc, especially gcc version 6. As we do not currently have the resources to exhaustively test the experiment across a wide variety of environments, we strongly suggest use of the provided Docker container.


This artifact is designed to provide both the tools developed for the paper and an example of the experiment.

Due to the sheer size of the experimentation performed for the paper, it is not feasible to have the artifact duplicate these; we provide a subset of both the corpus to harvest a set of mutants from, and a randomly selected subset of mutation operators to insert into the system under test.


  • As the test suites used to calculate the Am(S) score for the experiment are generated randomly, the Am(S) score provided at the end of the experiment can vary from run to run.
  • The toolchain has been evolving steadily since the initial submission of the paper; as a result, this artifact shows significant improvements in both compilation rate and Am(S) scores (note that we consider lower Am(S) scores to be more desirable) over the experimental results reported in the paper.
  • This artifact omits an idiomization pass and identifier shifts and instead focuses entirely on syntactic mutation operators due to time constraints for running the artifact.


Artifact for the FSE2017 paper "The Care and Feeding of Wild-Caught Mutants"






No releases published


No packages published