The ISoLA 2024 proceedings constitutes contributions of the associated events held at the 12th International Symposium on Leveraging Applications of Formal Methods, ISoLA 2024, which took place in Crete, Greece, in October 2024.

Rigorous Engineering of Collective Adaptive Systems  -  Introduction to the 5th Track Edition.- Optimality-preserving Reduction of Chemical Reaction Networks.- Exploring Consensus Robustness in Swarms with Disruptive Individuals.- Towards Real-Time Aggregate Computing.- Epistemic Ensembles in Semantic and Symbolic Environments.- The evolving conscious agent, I.- Emergence in Multi-Agent Systems: A Safety Perspective.- The EM-BDD algorithm for learning hidden Markov models.- Is Machine Learning Model Checking Privacy Preserving?.- Matching Expectations in Ensembles: Connecting Verifiable Credentials and the Semantic Web.- Once and for all: how to compose modules - The Composition Calculus.- RailCabs and Birds in Julia - Context-Role Ensemble Engineering in Practice.- How Well Do LLMs Understand DEECo Ensemble-based Component Architectures.- Model-Driven Development of Multi-Robot Systems: From BPMN Models to X-KLAIM Code.- Rigorous Model Engineering of Hierarchical Multirate CPSs in MR-HybridSynchAADL.- An Approach for Extended Swarm Formation Flight with Drones: Protease2.0.- Monitoring Local and Global Properties of Collective Adaptive Systems.- Rigorous Analysis of Idealised Pathfinding Ants in Higher-Order Logic.- Statistical model checking of cooperative autonomous driving systems.- Attributed Point-to-point Communication in R-Check.- Local Reasoning and Attribute-based Memory Updates for Enforcing Global Invariants in Collective Adaptive Systems.