viASP

viASP generates an interactive visualization of your ASP program and its stable models

Try it out in Binder!

viASP allows you to explore the visualization in a variety of ways:

• Inspect iterations of recursive rules individually
• Explain the derivation of symbols with arrows
• Relax the constraints of unsatisfiable programs
• Toggle parts of the program
• Show the added symbols or all of them
• Inspect a single model
• Add #show statements on the fly
• Search models, signatures and rules.

Installation

viASP is available as a conda package. You can install it with:

conda install viasp -c potassco -c conda-forge -c stephanzwicknagl

Alternatively, viASP is also available on PyPI. You can install it with pip:

pip install viasp

Usage

Consider the file hamiltonian.lp:

node(1..4). start(1).
edge(1,2). edge(2,3). edge(2,4). edge(3,1).
edge(3,4). edge(4,1). edge(4,3). 

{ hc(V,U) } :- edge(V,U).
reached(V)  :- hc(S,V), start(S).
reached(V)  :- reached(U), hc(U,V).
:- node(V), not reached(V).
:- hc(V,U), hc(V,W), U!=W.
:- hc(U,V), hc(W,V), U!=W.

To start a visualization from the command line, run:

viasp hamiltonian.lp

Check out the documentation to see a full description on how to use viASP.

Examples

An introduction to viASP's features is given in the notebook. The examples folder shows a variety of scripts that run viASP.

Contributing

See the documentation page to see how to contribute.