Reachability problem

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August undefined, 2024

WebJan 1, 2015 · A recently proposed \(\delta \)-complete decision procedure [] relaxes the reachability problem for HAs in a sound manner: it verifies a conservative approximation of the system behavior, so that bugs will always be detected.The over-approximation can be tight (tunable by an arbitrarily small rational parameter \(\delta \)), and a false alarm with … WebGiven two families of sets and , the separability problem for asks whether for two given sets there exists a set , such that is included in and is disjoint with . We consider two families of sets : modular sets …

The Reachability Problem for Petri Nets Is Not Elementary

Webputational complexity of the reachability problem for VAS remains one of the most well-known open questions in theoretical computer science. While decidability was still … WebThe question of reachability revolves about what can be accomplished using admissible inputs. Problems of observability focus on what can be done with system outputs. More precisely, each state x ∈ X of a system generates a certain output via the system output map where Γ is the output set. earth guild yarns

Fractional optimal reachability problems with ψ ‐Hilfer fractional ...

WebJan 3, 2014 · Reachability from a program variable v to a program variable w states that from v, it is possible to follow a path of memory locations that leads to the object bound to w.We present a new abstract domain for the static analysis of possible reachability between program variables or, equivalently, definite unreachability between them. Webputational complexity of the reachability problem for VAS remains one of the most well-known open questions in theoretical computer science. While decidability was still unknown, Lipton made initial progress on the problem by showing it ExpSpace-hard [12], which is still the highest known lower bound. A few years later, Mayr showed the prob- WebSep 19, 2024 · The Reachability Problem for Petri Nets is Not Elementary. Petri nets, also known as vector addition systems, are a long established model of concurrency with … ct hb5209

Reachability Problem in Temporal Graphs SpringerLink

WebJun 13, 2024 · The reachability problems and shortest-path problems have been extensively studied not only for general graphs but also for special classes of graphs; directed planar graphs , Euclidean spanners [9, 19], and disk-intersection graphs [3, 5]. In the following, we introduce several results for transmission graphs of disks in the plane. WebJun 18, 2007 · In complexity theory reachability for finite graphs has been important in the investigation of subclasses of P (e.g. see [4] and its reference list). The problem plays a … ct hb 5044WebMar 3, 2024 · Although the reachability is a fundamental problem for the graph dataset, few efforts has been conducted at the reachability problem for a temporal graph. Due to the … earth gw gbf wiki

"WebAbstract An algorithm is presented for the general Petri net reachability problem. It is based on a generalization of the basic reachability tree construction which is made symmetric with respect to the initial and final marking. " - Reachability problem

Reachability problem

WebReachability definition: (uncountable) The condition of being reachable. . WebMay 20, 2024 · Reachability analysis can also be used as a primitive step for reasoning about more complex liveness properties. Therefore, the question of decidability of …

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WebDec 4, 2009 · We consider the problem of reachability and characterise a public (that is, restriction-free) fragment for which it is decidable. This fragment is obtained by removing … WebOct 1, 2024 · We consider the problem of reachability on One-Counter Systems (OCSs) and Pushdown Systems (PDSs). The problem has a well-known O (n 3) bound on both models, …

WebA wireless sensor network (WSN) is emerging as an innovative method for gathering information that will significantly improve the reliability and efficiency of infrastructure systems. Broadcast is a common method to disseminate information in WSNs. A variety of counter-based broadcast schemes have been proposed to mitigate the broadcast-storm … Webmore general problem: CFL-reachability. A CFL-reachability problem is not an ordinary reachability problem (e.g., transitive closure), but one in which a path is considered to connect two nodes only if the concatenation of the labels on the edges of the path is a word in a particular context-freelanguage: Deﬁnition2.1.

WebJan 14, 2024 · Abstract We consider the problem of safety verification, formalized as control-state reachability, for concurrent programs running on the Power architecture. Our main result shows that safety verification under Power is undecidable for programs with just two threads. Download conference paper PDF 1 Introduction WebFirstly, it shows that the reachability problem is much harder than the coverability (i.e., state reachability) problem, which is also ubiquitous but has been known to be complete for exponential space since the late 1970s.

WebIn general, the all-pairs CFL-reachability problem can be solved in time O(jT [ Nj 3n ) for a graph with n nodes. Figure 2 shows an example of a Dyck-CFL reachability problem. The dashed lines show the edges added by the computation of closure(G). The edges show that there are S-paths between nodes x1 and z1, and x2 and z2. Self-loop

In graph theory, reachability refers to the ability to get from one vertex to another within a graph. A vertex can reach a vertex (and is reachable from ) if there exists a sequence of adjacent vertices (i.e. a walk) which starts with and ends with . In an undirected graph, reachability between all pairs of vertices can be determined by identifying the connected components of the graph. Any pair of vertices in such a graph can reach each other if … cthb100/pgWebMany problems in static program analysis can be modeled as the context-free language (CFL) reachability problem on directed labeled graphs. The CFL reachability problem can be generally solved in time ( 3), where is the number of vertices in the graph, with some specific cases that can be solved faster. In this earth guitar amplifiersWebMeaning of reachability. What does reachability mean? Information and translations of reachability in the most comprehensive dictionary definitions resource on the web. ct hb5293WebLecture: Reachability Analysis Reachability Analysis Minimum-energy control The problem is equivalent to ﬁnding the solution U of the system of equations X =RkU with minimum … ct hb 5269WebJun 23, 2024 · Firstly, it shows that the reachability problem is much harder than the coverability (i.e., state reachability) problem, which is also ubiquitous but has been known to be complete for exponential space since the late 1970s. ct hb5271WebDec 4, 2009 · We consider the problem of reachability and characterise a public (that is, restriction-free) fragment for which it is decidable. This fragment is obtained by removing the open capability and restricting the application of the replication operator to guarded processes only. This decidability result may appear surprising in combination with the ... earth gummies trolli where to findWebAug 30, 2024 · In such a graph, temporal reachability of one node from another is naturally captured by the existence of a temporal path where edges appear in chronological order. Inspired by the optimization of bus/metro/tramway schedules in a public transport network, we consider the problem of turning a collection of walks (called trips) in a directed ... ct hb 5349