This is the official artifact of the paper: SearchGEM5: Towards Reliable gem5with Search Based Software Testing and Large Language Models with the SearchGem5 tool available at GitHub: https://github.com/karineek/SearchGem5. This artifact contains: Gem5Testing-main.zip: is a snapshot of our GitHub repository. We will make the GitHub open access after de-anonymising the work (after the review phase). NOTE: NOT ALL FOLDERS MARKED AS "BUG" ARE REAL BUGS. We investigated each of them semi-manually and mapped the real bugs in the Excel file: SSBSE-gem5-bugs.xlsx. LLM-test-case-pattern-generation-prompts.zip: examples of the prompts used in our work. SSBSE-gem5-bugs.xlsx: details and summary of our bugs and their classification (with paths in Gem5Testing-main.zip where the data per bug is). This file is the actual results we reported in the paper. Last the coverage data and instrumented with gcov binaries used in the evaluation: AFTER-AFL-COV.zip, BEFORE-AFL-COV.zip, and gem5-instrumented-with-coverage-x86-ubuntu-20.04-g .... Data Availability: The files contain data and all our source code as part of the Open Science Policy. Citation Aidan Dakhama, Karine Even-Mendoza, W.B. Langdon, Hector Menendez, and Justyna Petke (2023). SearchGEM5: Towards Reliable gem5 with Search Based Software Testing and Large Language Models. Symposium on Search Based Software Engineering (SSBSE). BibTex entry: @inproceedings{EvenMendoza2023Gem5, title={SearchGEM5: Towards Reliable gem5 with Search Based Software Testing and Large Language Models}, author={Aidan Dakhama, Karine Even-Mendoza, W.B. Langdon, Hector Menendez, and Justyna Petke}, booktitle={Lecture Notes in Computer Science} year={2023}, publisher={15th Symposium on Search Based Software Engineering (SSBSE)} }