CigaR: Cost-efficient Program Repair with LLMs

CigaR is an LLM-based APR tool that focuses on token cost minimization. See CigaR: Cost-efficient Program Repair with LLMs (2024).

The paper to cite is

@techreport{cigar2402.06598,
 title = {CigaR: Cost-efficient Program Repair with LLMs},
 year = {2024},
 author = {Dávid Hidvégi and Khashayar Etemadi and Sofia Bobadilla and Martin Monperrus},
 url = {http://arxiv.org/pdf/2402.06598},
 number = {2402.06598},
 institution = {arXiv},
}

Repairing Defects4J Bugs

To fix Defects4J bugs, you should be using Java 8 and have installed libdbi-perl.

Install CigaR dependencies

Use the install.sh script to install the dependencies:

git clone git@github.com:ASSERT-KTH/cigar.git
cd cigar
bash install.sh

This also sets the user_params.py which defines the paths to the dependencies.

You must set three params in user.params.py: JAVA_HOME, TMP_DIR, and API_KEY. JAVA_HOME should refer to the home directory of Java 8 on your machine.

The prog_params.py contains the default parameters for the analysis.

Fixing a Single Defects4J Bug

To repair a Defects4J bug, run the following:

./cigar.sh {project-id} {bug-id}

For example, you can run:

./cigar.sh Chart 1

The resulting plausible patches are stored in output/defects4j_CigaR/plausible_patches/.

Reproduce CigaR Analysis on Defects4J

To reproduce the results of the analysis, first set the cigar_max_sample_count=100 and cigar_max_mpps_try_per_mode=5 in prog_params.py. Then, run the following command:

bash run_analysis.sh