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ASE 2020
Mon 21 - Fri 25 September 2020 Melbourne, Australia
Wed 23 Sep 2020 17:30 - 17:50 at Kangaroo - Software Engineering for AI (3) Chair(s): Iftekhar Ahmed

As neural networks make their way into safety-critical systems, where misbehavior can lead to catastrophes, there is a growing interest in certifying the equivalence of two structurally similar neural networks. For example, compression techniques are often used in practice for deploying trained neural networks on computationally- and energy-constrained devices, which raises the question of how faithfully the compressed network mimics the original network. Unfortunately, existing methods either focus on verifying a single network or rely on loose approximations to prove the equivalence of two networks. Due to overly conservative approximation, differential verification lacks scalability in terms of both accuracy and computational cost. To overcome these problems, we propose NeuroDiff, a symbolic and fine-grained approximation technique that drastically increases the accuracy of differential verification while achieving many orders-of-magnitude speedup. NeuroDiff has two key contributions. The first one is new convex approximations that more accurately bound the difference neurons of two networks under all possible inputs. The second one is judicious use of symbolic variables to represent neurons whose difference bounds have accumulated significant error. We also find that these two techniques are complementary, i.e., when combined, the benefit is greater than the sum of their individual benefits. We have evaluated NeuroDiff on a variety of differential verification tasks. Our results show that NeuroDiff is up to 1000X faster and 5X more accurate than the state-of-the-art tool.

Wed 23 Sep
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17:10 - 18:10: Software Engineering for AI (3)Research Papers / Tool Demonstrations at Kangaroo
Chair(s): Iftekhar AhmedUniversity of California at Irvine, USA
17:10 - 17:30
Talk
Research Papers
Viet Hung PhamUniversity of Waterloo, Shangshu QianPurdue University, Jiannan WangPurdue University, Thibaud LutellierUniversity of Waterloo, Jonathan RosenthalPurdue University, Lin TanPurdue University, USA, Yaoliang YuUniversity of Waterloo, Nachiappan NagappanMicrosoft Research
Pre-print
17:30 - 17:50
Talk
Research Papers
Brandon PaulsenUniversity of Southern California, Jingbo WangUniversity of Southern California, Jiawei WangUniversity of Southern California, Chao WangUSC
Pre-print
17:50 - 18:00
Talk
Tool Demonstrations
Efstratios KourtzanidisUniversity Of Macedonia, Alexander ChatzigeorgiouUniversity of Macedonia, Apostolos AmpatzoglouUniversity of Macedonia
Pre-print Media Attached File Attached