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Timon Gehr

7 accepted papers

2019

Boosting Robustness Certification of Neural Networks

ICLR 2019poster

We present a novel approach for the certification of neural networks against adversarial perturbations which combines scalable overapproximation methods with precise (mixed integer) linear programming. This results in significantly better precision than state-of-the-art verifiers on challenging feed…

Cited by 241SourcePDFScholar
2019

Certifying Geometric Robustness of Neural Networks

NeurIPS 2019poster

The use of neural networks in safety-critical computer vision systems calls for their robustness certification against natural geometric transformations (e.g., rotation, scaling). However, current certification methods target mostly norm-based pixel perturbations and cannot certify robustness agains…

2019

DL2: Training and Querying Neural Networks with Logic

ICML 2019oral

We present DL2, a system for training and querying neural networks with logical constraints. Using DL2, one can declaratively specify domain knowledge constraints to be enforced during training, as well as pose queries on the model to find inputs that satisfy a set of constraints. DL2 works by trans…

2018

Fast and Effective Robustness Certification

NeurIPS 2018poster

We present a new method and system, called DeepZ, for certifying neural network robustness based on abstract interpretation. Compared to state-of-the-art automated verifiers for neural networks, DeepZ: (i) handles ReLU, Tanh and Sigmoid activation functions, (ii) supports feedforward and convolution…

Cited by 674SourcePDFScholar
2018

Training Neural Machines with Trace-Based Supervision

ICML 2018oral

We investigate the effectiveness of trace-based supervision methods for training existing neural abstract machines. To define the class of neural machines amenable to trace-based supervision, we introduce the concept of a differential neural computational machine (dNCM) and show that several existin…