implement (j)torx state-space exploration interface

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the (j)torx state-space exploration interface allows on-demand exploration of the state space. it works like the open/caesar interface of CADP, but then using (textual) commands over a data-stream connection (stdin/stdout, pipe, tcp connection)

the principle is explained in http://fmt.cs.utwente.nl/tools/torx/torx-explorer.5.html a slightly extended version is implemented in LTSmin - there the transition identifiers are not used, but instead always the 'identical state' field is filled with the state identifier of the state reached by a transition.

I should have Java code for the the 'protocol at the 'server' side (where the state space is constructed).

what is needed is mainly: - identifiers for states that can be passed from 'server' to client and which the client can pass back to refer to a state it has seen before - a function 'init' that can be called to obtain the identifier of the initial state - a function 'succ' that can be called with a state identifier as argument, and returns a list (or iterator or whatever) of the outgoing transitions of the state, with for each transition the label and the identifier of the state reached by the transition

Reported by: axelbel

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• priority: 5 --> 4

Original comment by: rensink

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• Group: --> None

Original comment by: rensink