This is actually an undecidable question. If you say find me the shortest program that does 'x' for sufficiently complex x, there will be shorter programs that output nothing forever, but which cannot be proved to halt, due to the halting problem. This can be fixed by imposing resource constraints on the program or saying "make it as short as you can", if the AI understands such things. Presumably, if you input this request as stated, the AI would tell you it could not solve it and nothing more, so other posters should keep this problem in mind.