Verifying CTL* Properties of Golog Programs over Local-Effect Actions. Zarrieß, B. & Claßen, J. In Proceedings of the Twenty-First European Conference on Artificial Intelligence (ECAI 2014), pages 939-944, 2014. IOS Press. Paper abstract bibtex Golog is a high-level action programming language for controlling autonomous agents such as mobile robots. It is defined on top of a logic-based action theory expressed in the Situation Calculus. Before a program is deployed onto an actual robot and executed in the physical world, it is desirable, if not crucial, to verify that it meets certain requirements (typically expressed through temporal formulas) and thus indeed exhibits the desired behaviour. However, due to the high (first-order) expressiveness of the language, the corresponding verification problem is in general undecidable. In this paper, we extend earlier results to identify a large, non-trivial fragment of the formalism where verification is decidable. In particular, we consider properties expressed in a first-order variant of the branching-time temporal logic CTL*. Decidability is obtained by (1) resorting to the decidable first-order fragment C\texttwosuperior as underlying base logic, (2) using a fragment of Golog with ground actions only, and (3) requiring the action theory to only admit local effects.
@INPROCEEDINGS{ZarriessClassen2014b,
author = {Benjamin Zarrie{\ss} and Jens Cla{\ss}en},
title = {Verifying {CTL*} Properties of {G}olog Programs over
Local-Effect Actions},
booktitle = {Proceedings of the Twenty-First European Conference
on Artificial Intelligence (ECAI 2014)},
year = {2014},
pages = {939-944},
publisher = {IOS Press},
abstract = {Golog is a high-level action programming language for
controlling autonomous agents such as mobile
robots. It is defined on top of a logic-based action
theory expressed in the Situation Calculus. Before a
program is deployed onto an actual robot and
executed in the physical world, it is desirable, if
not crucial, to verify that it meets certain
requirements (typically expressed through temporal
formulas) and thus indeed exhibits the desired
behaviour. However, due to the high (first-order)
expressiveness of the language, the corresponding
verification problem is in general undecidable. In
this paper, we extend earlier results to identify a
large, non-trivial fragment of the formalism where
verification is decidable. In particular, we
consider properties expressed in a first-order
variant of the branching-time temporal logic
CTL*. Decidability is obtained by (1) resorting to
the decidable first-order fragment
C{\texttwosuperior} as underlying base logic, (2)
using a fragment of Golog with ground actions only,
and (3) requiring the action theory to only admit
local effects.},
url = {http://www.kbsg.rwth-aachen.de/~classen/pub/ZarriessClassen2014b.pdf}
}
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