Alloy Analyzer vs UPPAAL

Alloy Analyzer is a free model-checking tool for describing systems in the Alloy language and exploring the structures those descriptions permit. It searches for structures that satisfy constraints and for counterexamples to properties. Models can represent collections of structures that change over time, including security configurations and switching network topologies. The Analyzer presents results graphically, with appearance options that can be tailored to a domain. Alloy 6 adds mutable state, temporal logic, and temporal model checking; that checking requires NuSMV or nuXmv to be installed and available in PATH. The self-contained executable includes the Pardinus/Kodkod model finder, SAT solvers, the standard Alloy library, tutorial examples, and source code. The same JAR can be used as an API in other applications. Sterling adds a web-based visualizer with graph and table views, customizable and extendable with JavaScript. Alloy is self-hosted, supports Linux, macOS, Windows, and API use, and is maintained by volunteers.

UPPAAL is an integrated environment for modeling, simulating, and verifying real-time systems as networks of timed automata. Its language supports clock and data variables, including bounded integers and arrays. The model checker uses symbolic state-space exploration for invariant and reachability properties and can produce diagnostic traces. Statistical Model Checking estimates probabilities, compares a probability with a value, or compares two probabilities. UPPAAL Stratego supports generating, optimizing, comparing, and exploring strategies for stochastic priced timed games. Related tools include CORA, TRON, TIGA, ECDAR, and COSHY for cost-optimal analysis, testing, timed games, refinement, and hybrid-system control. Typical applications include real-time controllers and timing-critical communication protocols. Desktop packages support Windows, macOS, and Linux, including macOS x86_64 and Aarch64. The graphical interface needs Java 17 or later; verifyta runs without Java. Academic users register for a free license key, retrieved over the internet. Commercial and other non-academic use requires a separate license.