SMT-LIB

Gold definitionUpdated Apr 2, 2026

Definition

SMT-LIB is a standardized language and format for representing Satisfiability Modulo Theories (SMT) problems. It enables interoperability between SMT solvers and facilitates benchmarking and research in automated reasoning.

At a glance

Executive summary

SMT-LIB is a universal language used to describe complex logic puzzles for computer programs called SMT solvers. It helps different solvers understand the same problems, making it easier to test and improve them. This standardization is vital for advancing automated reasoning.

TL;DR

SMT-LIB is a standard computer language for writing logic problems that specialized programs called SMT solvers try to solve.

Key points

Provides a standardized syntax and semantics for logical formulas and theories
Enables interoperability and fair benchmarking for Satisfiability Modulo Theories (SMT) solvers
Used by SMT solver developers, formal verification engineers, and researchers in program analysis and AI planning
Unlike proprietary formats, SMT-LIB serves as the universal standard for SMT problem representation
A growing research trend involves integrating SMT-LIB problems with AI, such as LLMs, to enhance solver guidance and efficiency

Use cases

Formal verification of hardware designs (e.g., microprocessors) to prove correctness and absence of bugs.
Program analysis and bug finding in software, including detecting security vulnerabilities and proving code properties.
Automated test case generation for complex systems by encoding system behavior and desired test conditions.
AI planning and scheduling problems where constraints and goals are expressed as logical formulas.
Synthesis of programs or circuits from high-level specifications, transforming logical descriptions into executable code or hardware.

Also known as

SMT-LIB format, SMT-LIB language