Pegasus: A framework for sound continuous invariant generation

A Sogokon, S Mitsch, YK Tan, K Cordwell… - … Symposium on Formal …, 2019 - Springer
Continuous invariants are an important component in deductive verification of hybrid and
continuous systems. Just like discrete invariants are used to reason about correctness in …

[HTML][HTML] Pegasus: Sound continuous invariant generation

A Sogokon, S Mitsch, YK Tan, K Cordwell… - Formal Methods in …, 2021 - Springer
Continuous invariants are an important component in deductive verification of hybrid and
continuous systems. Just like discrete invariants are used to reason about correctness in …

A method for invariant generation for polynomial continuous systems

A Sogokon, K Ghorbal, PB Jackson… - … Conference on Verification …, 2015 - Springer
This paper presents a method for generating semi-algebraic invariants for systems governed
by non-linear polynomial ordinary differential equations under semi-algebraic evolution …

Deductive verification of continuous dynamical systems

A Taly, A Tiwari - IARCS Annual Conference on Foundations of …, 2009 - drops.dagstuhl.de
We define the notion of inductive invariants for continuous dynamical systems and use it to
present inference rules for safety verification of polynomial continuous dynamical systems …

Direct methods for deductive verification of temporal properties in continuous dynamical systems

A Sogokon - 2016 - era.ed.ac.uk
This thesis is concerned with the problem of formal verification of correctness specifications
for continuous and hybrid dynamical systems. Our main focus will be on developing and …

Relational abstractions for continuous and hybrid systems

S Sankaranarayanan, A Tiwari - … , CAV 2011, Snowbird, UT, USA, July 14 …, 2011 - Springer
In this paper, we define relational abstractions of hybrid systems. A relational abstraction is
obtained by replacing the continuous dynamics in each mode by a binary transition relation …

Verifying safety and persistence properties of hybrid systems using flowpipes and continuous invariants

A Sogokon, PB Jackson, TT Johnson - NASA Formal Methods Symposium, 2017 - Springer
We propose a method for verifying persistence of nonlinear hybrid systems. Given some
system and an initial set of states, the method can guarantee that system trajectories always …

Computing differential invariants of hybrid systems as fixedpoints

A Platzer, EM Clarke - Formal Methods in System Design, 2009 - Springer
We introduce a fixedpoint algorithm for verifying safety properties of hybrid systems with
differential equations whose right-hand sides are polynomials in the state variables. In order …

Forward invariant cuts to simplify proofs of safety

N Aréchiga, J Kapinski, JV Deshmukh… - 2015 International …, 2015 - ieeexplore.ieee.org
The use of deductive techniques, such as theorem provers, has several advantages in safety
verification of hybrid systems; however, state-of-the-art theorem provers require manual …

Bellerophon: Tactical theorem proving for hybrid systems

N Fulton, S Mitsch, B Bohrer, A Platzer - Interactive Theorem Proving: 8th …, 2017 - Springer
Hybrid systems combine discrete and continuous dynamics, which makes them attractive as
models for systems that combine computer control with physical motion. Verification is …