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A Sweep-Line Method for State Space Exploration [chapter]

Søren Christensen, Lars Michael Kristensen, Thomas Mailund
2001 Lecture Notes in Computer Science  
We present a state space exploration method for on-the-fly verification. The method is aimed at systems for which it is possible to define a measure of progress based on the states of the system.  ...  Our experiments show significant reductions in both space and time used during state space exploration.  ...  For infinite-state systems the sweep-line method can be used to explore and analyse larger prefixes of the state space than can be done with ordinary state space exploration.  ... 
doi:10.1007/3-540-45319-9_31 fatcat:dlwvzagdengflking4iq2wkshy

A Compositional Sweep-Line State Space Exploration Method [chapter]

Lars Michael Kristensen, Thomas Mailund
2002 Lecture Notes in Computer Science  
The sweep-line method exploits a certain kind of progress present in many systems to reduce peak memory usage during state space exploration.  ...  State space exploration is a main approach to verification of finite-state systems.  ...  The authors would like to thank Michael Westergaard for assisting in the implementation of the prototype.  ... 
doi:10.1007/3-540-36135-9_21 fatcat:xg3crkf4ija4lnun2ffp3dr5ni

The sweep-line state space exploration method

Kurt Jensen, Lars M. Kristensen, Thomas Mailund
2012 Theoretical Computer Science  
Second, we survey a selection of case studies where the sweep-line method has been put into practical use for the verification of concurrent systems.  ...  The sweep-line method exploits intrinsic progress in concurrent systems to alleviate the state explosion problem in explicit state model checking.  ...  Acknowledgements The sweep-line method has been influenced by several co-authors of papers. In particular, we acknowledge the contributions of Jonathan Billington, Søren Christensen, Guy E.  ... 
doi:10.1016/j.tcs.2011.12.036 fatcat:ajwaohtrgzffzkrngki7vcjgcm

Combining the Sweep-Line Method with the Use of an External-Memory Priority Queue [chapter]

Sami Evangelista, Lars Michael Kristensen
2012 Lecture Notes in Computer Science  
The sweep-line method is an explicit-state model checking technique that uses a notion of progress to delete states from internal memory during state space exploration and thereby reduce peak memory usage  ...  detection compared to a pure external memory state space exploration method.  ...  The operation of the sweep-line method is illustrated in Fig. 1 which depicts a generic snapshot during state space exploration.  ... 
doi:10.1007/978-3-642-31759-0_6 fatcat:q7h725iqwjgn5lejmp6hz755ke

Advanced State Space Methods [chapter]

Kurt Jensen, Lars M. Kristensen
2009 Coloured Petri Nets  
Requires a partitioning function mapping from the set of states into partitions. A Sweep-Line Method for State Space Exploration S. Christensen, L.M. Kristensen and T.  ...  A conceptual sweep-line moves through the state space layer by layer: All states in the layer are "on" the sweep-line.  ... 
doi:10.1007/b95112_8 fatcat:puynvaytqzb3rfwjac57fpvvii

Automated Generation of a Progress Measure for the Sweep-Line Method [chapter]

Karsten Schmidt
2004 Lecture Notes in Computer Science  
In the context of Petri nets, we propose an automated construction of a progress measure which is an important pre-requisite for a state space reduction technique called the sweep-line method.  ...  Introduction The sweep-line method [Mai03] is a recently proposed reduction technique for explicit state space verification.  ...  The Sweep-Line Method First, we sketch the basic sweep-line method [CKM01] . At any snapshot during explicit state space exploration, we can distinguish three kinds of states.  ... 
doi:10.1007/978-3-540-24730-2_17 fatcat:le2sz44cozdgpcc75zj3lz3b7q

ASAP: An Extensible Platform for State Space Analysis [chapter]

Michael Westergaard, Sami Evangelista, Lars Michael Kristensen
2009 Lecture Notes in Computer Science  
The ASCoVeCo State space Analysis Platform (ASAP) is a tool for performing explicit state space analysis of coloured Petri nets (CPNs) and other formalisms.  ...  ASAP supports a wide range of state space reduction techniques and is intended to be easy to extend and to use, making it a suitable tool for students, researchers, and industrial users that would like  ...  Graphical representation of the Sweep Line Exploration task getParameters and getReturnType methods.  ... 
doi:10.1007/978-3-642-02424-5_18 fatcat:dpwhcuxp3ravfapbvqhb4mby4q

Formal specification and state space analysis of an operational planning process

Brice Mitchell, Lars Michael Kristensen, Lin Zhang
2007 International Journal on Software Tools for Technology Transfer (STTT)  
State space analysis was conducted using full state spaces and the sweep-line state space reduction method.  ...  In the analysis step, we also investigated the use of the sweep-line method which exploits the progress present in systems to reclaim memory during state space exploration and thereby alleviate the state  ...  In [11] , a CPN model of the planning process based on the observation of a DSTO-TR-1762  ... 
doi:10.1007/s10009-007-0032-3 fatcat:gs4e6ijepvc5jfw7reopi4kt3a

Checking safety properties on-the-fly with the sweep-line method

Guy Edward Gallasch, Jonathan Billington, Somsak Vanit-Anunchai, Lars Michael Kristensen
2007 International Journal on Software Tools for Technology Transfer (STTT)  
space exploration CPN'09 -13 Conclusions ComBack method for alleviating state explosion: Extension of the hash compaction to guarantee full coverage.  ...  : Distributed model checking: State space exploration is conducted using a set of machines / processes.  ...  Example: Partition Refinement Heuristics The refinement step requires the selection of state component to be used for the refinement.  ... 
doi:10.1007/s10009-007-0031-4 fatcat:4zx4q74c2zb2dewowqvs4v3c24

A Markov Decision Model for Area Coverage in Autonomous Demining Robot

Abdelhadi Larach, Cherki Daoui, Mohamed Baslam
2017 International Journal of Informatics and Communication Technology (IJ-ICT)  
This approach, called Goals to Goals Area Coverage on-line Algorithm, is based on a decomposition of the state space into smaller regions whose states are considered as goals with the same reward value  ...  In this work, we propose a new approach using Markov Decision Process to plan an optimum path to reach the general goal of exploring an unknown environment containing buried mines.  ...  For a large state space and real environment with obstacles, line sweep decomposition into monotone subregions can be used [13] ; in each subregion, an adequate line-sweep search mode is used to ensure  ... 
doi:10.11591/ijict.v6i2.pp105-116 fatcat:geiumlys7beaxgujrjozdkhvju

Search-Order Independent State Caching [chapter]

Sami Evangelista, Lars Michael Kristensen
2010 Lecture Notes in Computer Science  
provided by the sweep-line method.  ...  to explore the state space implied by these parameters, i.e., visit all its states.  ...  states stored by the sweep-line method.  ... 
doi:10.1007/978-3-642-18222-8_2 fatcat:npqorm25krbvnaos6qsqsxsi6u

Postponed Updates for Temporal-Difference Reinforcement Learning

Harm van Seijen, Shimon Whiteson
2009 2009 Ninth International Conference on Intelligent Systems Design and Applications  
This paper presents postponed updates, a new strategy for TD methods that can improve sample efficiency without incurring the computational and space requirements of model-based RL.  ...  Experimental results demonstrate that postponed updates outperforms several competitors, most notably eligibility traces, a traditional way to improve the sample efficiency of TD methods.  ...  The pseudocode for this method implements line 6 of algorithm 2 as: 10: end loop Besides that, the priority queue P Queue has to be initialized as an empty queue and after line 11 the line promote pair  ... 
doi:10.1109/isda.2009.76 dblp:conf/isda/SeijenW09 fatcat:xaplfgkw3recdiksyd2cispmqe

Optimistic Simulated Exploration as an Incentive for Real Exploration [article]

Ivo Danihelka
2009 arXiv   pre-print
I propose to use simulated exploration with an optimistic model to discover promising paths for real exploration. This reduces the needs for the real exploration.  ...  Many reinforcement learning exploration techniques are overly optimistic and try to explore every state. Such exploration is impossible in environments with the unlimited number of states.  ...  I also wish to thank the community around the mailing list for provocative ideas and discussions.  ... 
arXiv:0903.2972v3 fatcat:ssawdiqi7jg5dh3uqikjtr4bje

Symanzik Improvement In The Static Quark Potential [article]

Frederic D. R. Bonnet, Derek B. Leinweber, Anthony G. Williams and James M. Zanotti
2001 arXiv   pre-print
We have considered novel methods for stepping off-axis in the static quark potential which provides new insights into the extent to which the ground state potential dominates the Wilson loop correlation  ...  A matched set of standard Wilson gauge configurations is prepared at \beta = 5.74 with the same physical volume and lattice spacing and is studied for comparison.  ...  DE-FG05-86ER40273 and by the Florida State University Supercomputer Computations Research Institute which is partially funded by the Department of Energy through contract No. DE-FC05-85ER25000  ... 
arXiv:hep-lat/9912044v2 fatcat:zs6odvxy55fl5kxliyqeh7kvmy

Respiration resolved imaging with continuous stable state 2D acquisition using linear frequency SWEEP

L. H. Jackson, A. N. Price, J. Hutter, A. Ho, T. A. Roberts, P. J. Slator, J. R. Clough, M. Deprez, L. McCabe, S. J. Malik, L. Chappell, M. A. Rutherford (+1 others)
2019 Magnetic Resonance in Medicine  
To investigate the potential of continuous radiofrequency (RF) shifting (SWEEP) as a technique for creating densely sampled data while maintaining a stable signal state for dynamic imaging.  ...  In this case the sweep rate was explored linearly between R s = 0−1%. For comparison a typical M2D (Rs = 0%) acquisition scheme was simulated with a new slice started every 90 RF pulses.  ...  methods can be explored in the absence of significant tissue motion ( Figure 5) .  ... 
doi:10.1002/mrm.27834 pmid:31183892 pmcid:PMC6682494 fatcat:k7e4gg3ufzhxho6mufos66tzae
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