The three-volume set LNCS 12476 - 12478 constitutes the refereed proceedings of the 9th International Symposium on Leveraging Applications of Formal Methods, ISoLA 2020, which was planned to take place during October 20–30, 2020, on Rhodes, Greece.

Reliable Smart Contracts - Track Introduction.- Functional Verification of Smart Contracts via Strong Data Integrity.- Bitcoin covenants unchained.- Specifying Framing Conditions for Smart Contracts.- Making Tezos smart contracts more reliable with Coq.- UTxO- vs account-based smart contract blockchain programming paradigms.- Native Custom Tokens in the Extended UTXO Model.- UTXOma: UTXO with Multi-Asset Support.- Towards Configurable and Efficient Runtime Verification of Blockchain based Smart Contracts at the Virtual Machine Level.- Compiling Quantitative Type Theory to Michelson for Compile-Time Verification & Run-time Efficiency in Juvix.- Efficient static analysis of Marlowe contracts.- Accurate Smart Contract Verification through Direct Modelling.- Smart Derivatives: On-chain Forwards for Digital Assets.- The Good, the Bad and the Ugly: Pitfalls and Best Practices in Automated Sound Static Analysis of Ethereum Smart Contracts.- Automated Verification of Embedded Control Software - Track Introduction.- Model-Based Design, Verification and Deployment of Railway Interlocking System.- Guess What I'm Doing! Rendering Formal Verification Methods Ripe for the Era of Interacting Intelligent Systems.- On the Industrial Application of Critical Software Verification with VerCors.- A Concept of Scenario Space Exploration with Criticality Coverage Guarantees.- Towards Automated Service-oriented Verification of Embedded Control Software modeled in Simulink.- Verifying Safety Properties of Robotic Plans Operating in Real-World Environments via Logic-based Environment Modeling.- Formally Proving Compositionality in Industrial Systems with Informal Specifications.- Specification, Synthesis and Validation of Strategies for Collaborative Embedded Systems.- Formal methods for Distributed Computing in future Railway systems.- Ensuring Safety with System Level Formal Modelling.- A modular design framework to assess intelligent trains.- Formal Modelling and Verification of a Distributed Railway Interlocking System Using UPPAAL.- New Distribution Paradigms for Railway Interlocking.- Model Checking a Distributed Interlocking System Using k-induction with RT-Tester.- Designing a Demonstrator of Formal Methods for Railways Infrastructure Managers.