Have you tried recursive self-reflective agents?

The agent makes a copy of itself in /tmp/. Runs. Evaluates. Updates itself. Makes a copy of itself. Runs. Evaluates. Updates itself. Makes a ...... you get the idea.

They will not stop if the recursion is given a hard to meet termination condition. Also, if it can cheat to solve the termination condition it will.

I have not run one personally, but I love the idea. Reminds me of yoyo-evolve. My friend made this repo: https://github.com/dwolner/cosmic-insight