ARCH-COMP25 Category Report: Stochastic Models

TL;DR

This report details a competition on formal verification of stochastic models, introducing new benchmarks, tools, and recommendations to advance the field and facilitate tool comparison.

Contribution

It presents new software tools, benchmarks, and simplified models, and offers guidance for future competitions in stochastic model verification.

Findings

Introduction of three new software tools

A new water distribution network benchmark

A collection of simplified benchmarks for comparison

Abstract

This report is concerned with a friendly competition for formal verification and policy synthesis of stochastic models. The main goal of the report is to introduce new benchmarks and their properties within this category and recommend next steps toward next year's edition of the competition. In particular, this report introduces three recently developed software tools, a new water distribution network benchmark, and a collection of simplified benchmarks intended to facilitate further comparisons among tools that were previously not directly comparable. This friendly competition took place as part of the workshop Applied Verification for Continuous and Hybrid Systems (ARCH) in Summer 2025.