Scuttle - A Multi-Objective MaxSAT Solver in Rust

Scuttle is a multi-objective MaxSAT solver written in Rust and based on the RustSAT library and the CaDiCaL SAT solver.

Publications

This solver was used in our CP'23 paper on preprocessing for multi-objective optimization [5], our CPAIOR'24 paper on core boosting [6], and our TACAS'25 paper on proof-logging for multi-objective MaxSAT [7]. Additional material for the CP'23 paper can be found here, material for the CPAIOR'24 paper is available in the cpaior24/ directory, and for the TACAS'25 paper in the tacas25/ directory in this repository.

Algorithms

Building

Note: Scuttle requires nightly Rust, which can be installed via rustup.

If you simply want a binary of the solver, you can install it from crates.io by running cargo +nightly install --locked scuttle.

To build the project from source, make sure to initialize the git submodules with git submodule update --init --recursive. You can then build scuttle by running cargo +nightly build.

What's The Name

Apparently "scuttle" is one of multiple term for a group of crabs, which seemed fitting for a multi-objective solver in Rust.

References

• Takehide Soh and Mutsunori Banbara and Naoyuki Tamura and Daniel Le Berre: Solving Multiobjective Discrete Optimization Problems with Propositional Minimal Model Generation, CP 2017.
• Miyuki Koshimura and Hidetomo Nabeshima and Hiroshi Fujita and Ryuzo Hasegawa: Minimal Model Generation with Respect to an Atom Set, FTP 2009.
• Joao Cortes and Ines Lynce and Vasco M. Maquinho: New Core-Guided and Hitting Set Algorithms for Multi-Objective Combinatorial Optimization, TACAS 2023.
• Christoph Jabs and Jeremias Berg and Andreas Niskanen and Matti Järvisalo: MaxSAT-Based Bi-Objective Boolean Optimization, SAT 2022.
• Christoph Jabs and Jeremias Berg and Hannes Ihalainen and Matti Järvisalo: Preprocessing in SAT-Based Multi-Objective Combinatorial Optimization, CP 2023.
• Christoph Jabs and Jeremias Berg and Matti Järvisalo: Core Boosting in SAT-Based Multi-Objective Optimization, CPAIOR 2024.
• Christoph Jabs and Jeremias Berg and Bart Boergarts and Matti Järvisalo: Certifying Pareto-Optimality in Multi-Objective Maximum Satisfiability, TACAS 2025.