NNSynth: Neural Network Guided Abstraction-Based Controller Synthesis for Stochastic Systems

In this paper, we introduce NNSynth, a new framework that uses machine learning techniques to guide the design of abstraction-based controllers with correctness guarantees. NNSynth utilizes neural networks (NNs) to guide the search over the space of controllers. The trained neural networks are "projected" and used for constructing a "local" abstraction of the system. An abstraction-based controller is then synthesized from such "local" abstractions. If a controller that satisfies the specifications is not found, then the best found controller is "lifted" to a neural network for additional training. Our experiments show that this neural network-guided synthesis leads to more than $50\times$ or even $100\times$ speedup in high dimensional systems compared to the state-of-the-art.

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