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Beyond Solver Verdicts: Generative Reward Models for Autoformalization

First seen · 9/10/2026, 04:00 AMLatest activity · 9/10/2026, 04:00 AM

Neurosymbolic systems typically trust formal solvers to guarantee correctness, yet solvers remain blind to whether a translation accurately captures the original problem—a failure mode termed Verdict-Preserving-Unfaithfulness (VPU). This paper introduces Generative Verification (GenV), distilling an offline Z3 equivalence oracle into a reference-free, continuous scoring mechanism within a language model's native vocabulary space. Mechanistic analysis reveals it localizes translation errors without explicit supervision, while empirical benchmarks demonstrate a 0.961 AUROC in equivalence verification and an 11.3-point downstream accuracy gain during agentic test-time compute allocation.

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  1. AggregatorHuggingFace Daily Papers9/10, 04:00 AMnot independentRepresentative
    Beyond Solver Verdicts: Generative Reward Models for Autoformalization