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(* Title: HOL/Refute.thy
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ID: $Id$
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Author: Tjark Weber
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Copyright 2003-2004
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Basic setup and documentation for the 'refute' (and 'refute_params') command.
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*)
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(* ------------------------------------------------------------------------- *)
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(* REFUTE *)
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(* *)
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(* We use a SAT solver to search for a (finite) model that refutes a given *)
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(* HOL formula. *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* NOTE *)
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(* *)
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(* I strongly recommend that you install a stand-alone SAT solver if you *)
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(* want to use 'refute'. For details see 'HOL/Tools/sat_solver.ML'. *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* USAGE *)
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(* *)
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(* See the file 'HOL/ex/Refute_Examples.thy' for examples. The supported *)
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(* parameters are explained below. *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* CURRENT LIMITATIONS *)
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(* *)
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(* 'refute' currently accepts formulas of higher-order predicate logic (with *)
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(* equality), including free/bound/schematic variables, lambda abstractions, *)
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(* sets and set membership, "arbitrary", "The", and "Eps". Constants for *)
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(* which a defining equation exists are unfolded automatically. *)
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(* *)
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(* NOT (YET) SUPPORTED ARE *)
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(* *)
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(* - schematic type variables *)
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(* - type constructors other than bool, =>, set *)
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(* - other constants, including constructors of inductive datatypes, *)
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(* inductively defined sets and recursive functions *)
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(* *)
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(* For formulas that contain (variables of) an inductive datatype, a *)
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(* spurious countermodel may be returned. Currently no warning is issued in *)
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(* this case. *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* PARAMETERS *)
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(* *)
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(* The following global parameters are currently supported (and required): *)
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(* *)
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(* Name Type Description *)
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(* *)
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(* "minsize" int Only search for models with size at least *)
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(* 'minsize'. *)
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(* "maxsize" int If >0, only search for models with size at most *)
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(* 'maxsize'. *)
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(* "maxvars" int If >0, use at most 'maxvars' boolean variables *)
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(* when transforming the term into a propositional *)
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(* formula. *)
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(* "satsolver" string Name of the SAT solver to be used. *)
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(* *)
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(* See 'HOL/Main.thy' for default values. *)
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(* ------------------------------------------------------------------------- *)
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(* ------------------------------------------------------------------------- *)
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(* FILES *)
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(* *)
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(* HOL/Tools/prop_logic.ML Propositional logic *)
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(* HOL/Tools/sat_solver.ML SAT solvers *)
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(* HOL/Tools/refute.ML Translation HOL -> propositional logic and *)
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(* boolean assignment -> HOL model *)
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(* HOL/Tools/refute_isar.ML Adds 'refute'/'refute_params' to Isabelle's *)
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(* syntax *)
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(* HOL/Refute.thy This file: loads the ML files, basic setup, *)
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(* documentation *)
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(* HOL/Main.thy Sets default parameters *)
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(* HOL/ex/RefuteExamples.thy Examples *)
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(* ------------------------------------------------------------------------- *)
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header {* Refute *}
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theory Refute = Map
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files "Tools/prop_logic.ML"
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"Tools/sat_solver.ML"
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"Tools/refute.ML"
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"Tools/refute_isar.ML":
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use "Tools/prop_logic.ML"
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use "Tools/sat_solver.ML"
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use "Tools/refute.ML"
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use "Tools/refute_isar.ML"
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setup Refute.setup
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end
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