## Abstract

In temporal-logic model checking, we verify the correctness of a program with respect to a desired behavior by checking whether a structure that models the program satisfies a temporal-logic formula that specifies the behavior. The main practical limitation of model checking is caused by the size of the state space of the program, which grows exponentially with the number of concurrent components. This problem, known as the state-explosion problem, becomes more difficult when we consider real-time model checking, where the program and the specification involve quantitative references to time. In particular, when use timed automata to describe real-time programs and we specify timed behaviors in the logic TCTL, a real-time extension of the temporal logic CTL with dock variables, then the state space under consideration grows exponentially not only with the number of concurrent components, but also with the number of clocks and the length of the clock constraints used in the program and the specification. Two powerful methods for coping with the state-explosion problem are on-the-fly and space-efficient model checking. In on-the-fly model checking, we explore only the portion of the state space of the program whose exploration is essential for determining the satisfaction of the specification. In space-efficient model checking, we store in memory the minimal information required, preferring to spend time on reconstructing information rather than spend space on storing it. In this work we develop an automata-theoretic approach to TCTL model checking that combines both methods. We suggest, for the first time, a PSPACE on-the-fly model-checking algorithm for TCTL.

Original language | American English |
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Title of host publication | CONCUR 1996 |

Subtitle of host publication | Concurrency Theory - 7th International Conference, Proceedings |

Editors | Ugo Montanari, Vladimiro Sassone |

Publisher | Springer Verlag |

Pages | 514-529 |

Number of pages | 16 |

ISBN (Print) | 9783540616047 |

DOIs | |

State | Published - 1996 |

Externally published | Yes |

Event | 7th International Conference on Concurrency Theory, CONCUR 1996 - Pisa, Italy Duration: 26 Aug 1996 → 29 Aug 1996 |

### Publication series

Name | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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Volume | 1119 |

ISSN (Print) | 0302-9743 |

ISSN (Electronic) | 1611-3349 |

### Conference

Conference | 7th International Conference on Concurrency Theory, CONCUR 1996 |
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Country/Territory | Italy |

City | Pisa |

Period | 26/08/96 → 29/08/96 |

### Bibliographical note

Publisher Copyright:© Springer-Verlag Berlin Heidelberg 1996.