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Last Commit 23 days ago

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Programming language: Haskell

License: GNU General Public License v2.0 only

Tags: Logic

Latest version: v1.1.0

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README

SMCDEL

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.

2) 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)
```

3) 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](https://github.com/jrclogic/SMCDEL/tree/master/Examples).

4) 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.

Data.HasCacBDD which runs CacBDD from http://kailesu.net/CacBDD/
Cudd (with some patches)