Is there an instance of the client process such that it is possible that My second question concerns verification of temporal logic properties:Īre there any other tools which are able to verify the following formulae?ĮXISTS id IDSET(server): ^(server.noqueue>1)ĮXISTS id IDSET(client): ^(client.noqueue>1)Į.g. Moreover, it is for sure that this blows upĪre there any other tools which are able to find this deadlock? (I agree, that in many cases it makes sense to deviate from the Z.100 The server process is blocked, waiting for data. Thus, the second client instance terminates.ġ1. (which is stored in the implicit variable Offspring). In such a way that it does not check the return value In the SDL system, the client process is specified Thus, according to the Z.100, Null is returned.ġ0. This is not possible because this would exceed the maximal number The second client instance tries to create a new (third) The second client instance receives the acknowledgement.ĩ. The server instance answers with a correctĨ. The first client instance creates a new (second) client instance.Ħ. The first client instance receives the acknowledgement.ĥ.
The server instance answers with a correctĤ. All initialisation and initial process instance creationģ. If you follow the Z.100 (and thus allow non-atomic SDL transition) there isġ. Signalroute a from server to client with ack Signalroute d from client to server with data The following example demonstrates the impact: According to the Z.100, SDL state transitions are notĪtomic. One interesting point is the atomicity of SDL state Now, I would be interested to compare the verification results with We have recently included SDL support in our verification tool PEP.
From bernd# (Bernd Grahlmann) to sdlnews. The originator of this message is responsible for its content. Previous message: Bernd Grahlmann: "RE: SDL-News: Communication between processes in different blocks".Next message: Sergio Lopes: "SDL-News: RE: News: Create Request".SDL Mailing List Archive (1997-1999): SDL-News: SDL verification SDL-News: SDL verificationįrom: Bernd Grahlmann ( bernd# )
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