ng Automatic Abstraction Refinement for Generalized Symbolic Trajectory Evaluation Yan Chen Dept. of Computer Science Portland State University Portland, OR, 97207 chenyan@cs.pdx.edu Fei Xie Dept. of Computer Science Portland State University Portland, OR, 97207 xie@cs.pdx.edu Jin Yang Strategic CAD Labs, DTS Intel Corporation Hillsboro, OR 97124 jin.yang@intel.com In this paper, we present a suite of optimizations targeting autostraction refinement for Generalized Symbolic Trajectory Evaluation (GSTE). We optimize both model refinement and spec refinement supported by AutoGSTE: a counterexample-guided refinement loop for GSTE. Experiments on a family of benchmark circuits have shown that our optimizations lead to major efficiency ents in verification involving abstraction refinement. Categories and Subject Descriptors B.6.3 [Logic Design]: Design Aids--Verification, Optimization General Terms Verification, Performance, Algorithms Keywords Model Checking, Generalized Symbolic Trajecto...