Vibe-Coded and Tuned: A State-of-the-Art SMT Solver for QF-LRA

Abstract

This paper presents the SMT solver primo, which is fully vibe-coded and then parameter-tuned, achieving state-of-the-art results on linear real arithmetic (QF-LRA). The performance of primo is achieved by a systematic literature survey, repeated profiling, and parameter tuning. The resulting solver outperforms the winner of the QF-LRA track of SMT-COMP~2026. This confirms that vibe-coding of automated reasoning tools will enable us to make great strides in the future.