AIBullisharXiv – CS AI · 14h ago7/10
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Keep the Proof State Live: Snapshotting for Efficient Tactic Search in Lean 4
Researchers introduce proof-state snapshotting, a technique that accelerates automated theorem proving in Lean 4 by reusing elaborated proof states across parallel search branches instead of reconstructing them. The method achieves 5.6-50x speedups (averaging 14x) on benchmark problems, addressing a critical bottleneck where per-branch overhead from import loading and elaboration consumed over 99% of computation time.