Self replicatint robots are still controlled by entropy in our universe. Flaws will be made and slip through. Their programming will change like our dna changes, there is no avoiding that. Most of it will make them segfault, tiny amounts will make them behave different, but you would really need a lot of those robots. I think the self replication part will prove to be more difficult than expected, especially considering you will need different types of robots for different kinds of tasks, or you would need something that works in the current environment in which we thrive because we have been shaped by it for over billions of years. I think they will be reliant on us for much longer than we think. We have been optimized over billions of years to function the way we do. I doubt you can compress that in a couple of years.