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README.md

SMCDEL

Release Hackage Build Status DOI

A symbolic model checker for Dynamic Epistemic Logic.

You can find a complete literate Haskell documentation in the file SMCDEL.pdf.

References

Johan van Benthem, Jan van Eijck, Malvin Gattinger, and Kaile Su: Symbolic Model Checking for Dynamic Epistemic Logic. In: Proceedings of The Fifth International Conference on Logic, Rationality and Interaction (LORI-V), 2015.

Johan van Benthem, Jan van Eijck, Malvin Gattinger, and Kaile Su: Symbolic Model Checking for Dynamic Epistemic Logic --- S5 and Beyond. Journal of Logic and Computation, 2017.

Malvin Gattinger: Towards Symbolic Factual Change in DEL. ESSLLI 2017 student session, 2017.

Malvin Gattinger: New Directions in Model Checking Dynamic Epistemic Logic. PhD thesis, ILLC, Amsterdam, 2018.

Online

You can try SMCDEL online here: https://w4eg.de/malvin/illc/smcdelweb/

Dependencies

On Debian, just do sudo apt install graphviz dot2tex.

Basic usage

  1. Use stack from https://www.stackage.org
  • stack build will compile everything. This might fail if one of the BDD packages written in C and C++ is missing. In this case, install those manually and then try stack build again.

  • stack install will put two executables smcdel and smcdel-web into ~/.local/bin which should be in your PATH variable.

  1. Create a text file MuddyShort.smcdel.txt which describes the knowledge structure and the formulas you want to check for truth or validity:

    -- Three Muddy Children in SMCDEL
    VARS 1,2,3
    LAW  Top
    OBS  alice: 2,3
         bob:   1,3
         carol: 1,2
    WHERE?
      [ ! (1|2|3) ] alice knows whether 1
    VALID?
      [ ! (1|2|3) ]
      [ ! ((~ (alice knows whether 1)) & (~ (bob knows whether 2)) & (~ (carol knows whether 3))) ]
      [ ! ((~ (alice knows whether 1)) & (~ (bob knows whether 2)) & (~ (carol knows whether 3))) ]
      (alice,bob,carol) comknow that (1 & 2 & 3)
    
  2. Run smcdel MuddyShort.smcdel.txt resulting in:

    >> smcdel MuddyShort.smcdel.txt
    SMCDEL 1.0 by Malvin Gattinger -- https://github.com/jrclogic/SMCDEL
    
    At which states is ... true?
    []
    [1]
    
    Is ... valid on the given structure?
    True
    

    More example files are in the folder Examples.

  3. To use the web interface run smcdel-web and then open http://localhost:3000/index.html.

Advanced usage

To deal with more complex models and formulas, use SMCDEL as a Haskell module.

Examples can be found in the folders src/SMCDEL/Examples and bench.

Used BDD packages

SMCDEL can be used with different BDD packages. To compile and run the benchmarks you will have to install all of them.

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