IDP 3
Team
- Bart Bogaerts (KU Leuven)
- Maurice Bruynooghe (KU Leuven)
- Broes De Cat (KU Leuven)
- Marc Denecker (KU Leuven)
- Jo Devriendt (KU Leuven)
- Joachim Jansen (KU Leuven)
- Pieter Van Hertum (KU Leuven)
- Stef De Pooter (KU Leuven)
Description
IDP 3 uses FO(ID,Agg) + Lua as input language.
Model generation/optimization is achieved by lifted unit propagation + grounding with bounds (possibly using XSB for evaluating definitions) + applying the search algorithm MinisatID.
The integration with Lua (with logic components as first-class citizens) is used for pre- and postprocessing and to implement more complex inferences.
System Settings
System versions:
- IDP 3.1.4
- MinisatID 3.7.4
- XSB 3.3
We will refer to the following options:
- cpsupport = using finite domain variables and constraints during search
- lazy grounding = interleaving grounding and search.
- xsb = evaluation of definitions with only 2-valued open symbols before search, by applying the XSB Prolog system.
- symmetrybreaking = automated symmetry detection + addition of static symmetry breaking formulas to the theory.
- groundwithbounds = derive bounds on necessary variable instantations during grounding. by reasoning based on the input interpretation + improve the order of instantiation.
- liftedunitpropagation = apply approximative unit propagation on the non-ground theory.
By default, the first 4 are disabled and the last 2 are enabled. Only options not taking their default value are mentioned.
System Track: lazy grounding, xsb, cpsupport.
- FO(.)^IDP is used as input language.
Model-and-Solve Track:
- N01 Permutation Pattern Matching: cpsupport, groundwithbounds off, liftedunitpropagation off
- N02 Valves Location Problem: symmetrybreaking, cpsupport
- N04 Connected Density Maximum Still life: symmetrybreaking, cpsupport, xsb
- N05 Graceful Graphs: cpsupport
- N06 Bottle Filling
- N07 Nomystery: symmetrybreaking
- N08 Sokoban: xsb, symmetrybreaking
- N09 Ricochet Robots
- N12 Strategic Companies
- O10 Crossing Minimization: xsb, cpsupport
- O11 Reachability: liftedunitpropagation off, lazy grounding
- O13 Solitaire: cpsupport
- O14 Weighted Sequence Problem: cpsupport, groundwithbounds off, liftedunitpropagation off
- O15 Stable Marriage: xsb, cpsupport
- O16 Incremental Scheduling: symmetrybreaking, xsb, cpsupport
References
Participant URL.
Wittocx J., Marien M. and Denecker M., The idp system: a model expansion system for an extension of classical logic. LASH 2008.