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Representing hybrid automata by action language modulo theories*

Published online by Cambridge University Press:  23 August 2017

JOOHYUNG LEE ,
NIKHIL LONEY  and
YUNSONG MENG
JOOHYUNG LEE
Affiliation:
School of Computing, Informatics and Decision Systems Engineering, Arizona State University, Tempe, AZ, USA (e-mail: [email protected], [email protected])
NIKHIL LONEY
Affiliation:
School of Computing, Informatics and Decision Systems Engineering, Arizona State University, Tempe, AZ, USA (e-mail: [email protected], [email protected])
YUNSONG MENG
Affiliation:
Houzz, Inc., Palo Alto, CA, USA (e-mail: [email protected])
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Abstract

Both hybrid automata and action languages are formalisms for describing the evolution of dynamic systems. This paper establishes a formal relationship between them. We show how to succinctly represent hybrid automata in an action language which in turn is defined as a high-level notation for answer set programming modulo theories—an extension of answer set programs to the first-order level similar to the way satisfiability modulo theories (SMT) extends propositional satisfiability (SAT). We first show how to represent linear hybrid automata with convex invariants by an action language modulo theories. A further translation into SMT allows for computing them using SMT solvers that support arithmetic over reals. Next, we extend the representation to the general class of non-linear hybrid automata allowing even non-convex invariants. We represent them by an action language modulo ordinary differential equations, which can be compiled into satisfiability modulo ordinary differential equations. We present a prototype system cplus2aspmt based on these translations, which allows for a succinct representation of hybrid transition systems that can be computed effectively by the state-of-the-art SMT solver dReal.

Keywords

Answer set programmingAction languagesHybrid automata
Type
Regular Papers
Information
Theory and Practice of Logic Programming , Volume 17 , Special Issue 5-6: 33rd International Conference on Logic Programming , September 2017 , pp. 924 - 941
Copyright
Copyright © Cambridge University Press 2017 

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Footnotes

*

This work was partially supported by the National Science Foundation under Grants IIS-1319794 and IIS-1526301.

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