org.sosy_lab.java_smt.basicimpl

Class AbstractFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl>

java.lang.Object

org.sosy_lab.java_smt.basicimpl.AbstractFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl>

Type Parameters:

TFormulaInfo - The solver specific type.

All Implemented Interfaces:

FormulaManager

public abstract class AbstractFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl>
extends Object
implements FormulaManager

Simplifies building a solver from the specific theories.

Field Summary

Fields

Modifier and Type	Field and Description
static ImmutableSet<String>	BASIC_OPERATORS Avoid using basic mathematical or logical operators of SMT-LIB2 as names for symbols.
static ImmutableBiMap<Character,String>	DISALLOWED_CHARACTER_REPLACEMENT Mapping of disallowed char to their escaped counterparts.
static ImmutableSet<String>	SMTLIB2_KEYWORDS Avoid using basic keywords of SMT-LIB2 as names for symbols.

Constructor Summary

Constructors

Modifier

Constructor and Description

protected

AbstractFormulaManager(FormulaCreator<TFormulaInfo,TType,TEnv,TFuncDecl> pFormulaCreator, AbstractUFManager<TFormulaInfo,?,TType,TEnv> functionManager, AbstractBooleanFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> booleanManager, @Nullable IntegerFormulaManager pIntegerManager, @Nullable RationalFormulaManager pRationalManager, @Nullable AbstractBitvectorFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> bitvectorManager, @Nullable AbstractFloatingPointFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> floatingPointManager, @Nullable AbstractQuantifiedFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> quantifiedManager, @Nullable AbstractArrayFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> arrayManager) Builds a solver from the given theory implementations.

Method Summary

Modifier and Type	Method and Description
protected BooleanFormula	applyCNFImpl(BooleanFormula pF)
protected BooleanFormula	applyNNFImpl(BooleanFormula input)
protected BooleanFormula	applyQELightImpl(BooleanFormula pF)
BooleanFormula	applyTactic(BooleanFormula f, Tactic tactic) Apply a tactic which performs formula transformation.
protected BooleanFormula	applyUFEImpl(BooleanFormula pF)
static void	checkVariableName(String variableName) This method is similar to isValidName(java.lang.String) and throws an exception for invalid symbol names.
Appender	dumpFormula(BooleanFormula t) Serialize an input formula to an SMT-LIB format.
abstract Appender	dumpFormula(TFormulaInfo t)
String	escape(String pVar) Get an escaped symbol/name for variables or undefined functions, if necessary.
TFormulaInfo	extractInfo(Formula f)
Map<String,Formula>	extractVariables(Formula f) Extract names of all free variables in a formula.
Map<String,Formula>	extractVariablesAndUFs(Formula f) Extract the names of all free variables and UFs in a formula.
ArrayFormulaManager	getArrayFormulaManager() Returns the Array-Theory.
AbstractBitvectorFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl>	getBitvectorFormulaManager() Returns the Bitvector-Theory.
AbstractBooleanFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl>	getBooleanFormulaManager() Returns the Boolean-Theory.
TEnv	getEnvironment()
FloatingPointFormulaManager	getFloatingPointFormulaManager() Returns the Floating-Point-Theory.
FormulaCreator<TFormulaInfo,TType,TEnv,TFuncDecl>	getFormulaCreator()
<T extends Formula> FormulaType<T>	getFormulaType(T formula) Returns the type of the given Formula.
IntegerFormulaManager	getIntegerFormulaManager() Returns the Integer-Theory.
AbstractQuantifiedFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl>	getQuantifiedFormulaManager() Returns the interface for handling quantifiers.
RationalFormulaManager	getRationalFormulaManager() Returns the Rational-Theory.
AbstractUFManager<TFormulaInfo,?,TType,TEnv>	getUFManager() Returns the function for dealing with uninterpreted functions (UFs).
boolean	isValidName(String pVar) Check whether the given String can be used as symbol/name for variables or undefined functions.
<T extends Formula> T	makeApplication(FunctionDeclaration<T> declaration, Formula... args) Create a function application to the given list of arguments.
<T extends Formula> T	makeApplication(FunctionDeclaration<T> declaration, List<? extends Formula> args) Create a function application to the given list of arguments.
<T extends Formula> T	makeVariable(FormulaType<T> formulaType, String name) Create variable of the type equal to formulaType.
<T extends Formula> T	simplify(T f) Simplify an input formula, while ensuring equivalence.
protected TFormulaInfo	simplify(TFormulaInfo f)
<T extends Formula> T	substitute(T pF, Map<? extends Formula,? extends Formula> pFromToMapping) Substitute every occurrence of any item from changeFrom in formula f to the corresponding occurrence from changeTo.
<T extends Formula> T	transformRecursively(T f, FormulaTransformationVisitor pFormulaVisitor) Visit the formula recursively with a given FormulaVisitor.
BooleanFormula	translateFrom(BooleanFormula other, FormulaManager otherContext) Translates the formula from another context into the context represented by this.
String	unescape(String pVar) Unescape the symbol/name for variables or undefined functions, if necessary.
<R> R	visit(Formula input, FormulaVisitor<R> visitor) Visit the formula with a given visitor.
void	visitRecursively(Formula pF, FormulaVisitor<TraversalProcess> pFormulaVisitor) Visit the formula recursively with a given FormulaVisitor.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.sosy_lab.java_smt.api.FormulaManager

parse

Field Detail

BASIC_OPERATORS

public static final ImmutableSet<String> BASIC_OPERATORS

Avoid using basic mathematical or logical operators of SMT-LIB2 as names for symbols.

We do not accept some names as identifiers for variables or UFs, because they easily misguide the user. Most solvers even would allow such identifiers directly, currently only SMTInterpol has problems with some of them. For consistency, we disallow those names for all solvers.

SMTLIB2_KEYWORDS

public static final ImmutableSet<String> SMTLIB2_KEYWORDS

Avoid using basic keywords of SMT-LIB2 as names for symbols.

We do not accept some names as identifiers for variables or UFs, because they easily misguide the user. Most solvers even would allow such identifiers directly, currently only SMTInterpol has problems with some of them. For consistency, we disallow those names for all solvers.

DISALLOWED_CHARACTER_REPLACEMENT

public static final ImmutableBiMap<Character,String> DISALLOWED_CHARACTER_REPLACEMENT

Mapping of disallowed char to their escaped counterparts.

Constructor Detail

AbstractFormulaManager

protected AbstractFormulaManager(FormulaCreator<TFormulaInfo,TType,TEnv,TFuncDecl> pFormulaCreator,
                                 AbstractUFManager<TFormulaInfo,?,TType,TEnv> functionManager,
                                 AbstractBooleanFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> booleanManager,
                                 @Nullable IntegerFormulaManager pIntegerManager,
                                 @Nullable RationalFormulaManager pRationalManager,
                                 @Nullable AbstractBitvectorFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> bitvectorManager,
                                 @Nullable AbstractFloatingPointFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> floatingPointManager,
                                 @Nullable AbstractQuantifiedFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> quantifiedManager,
                                 @Nullable AbstractArrayFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> arrayManager)

Builds a solver from the given theory implementations.

Method Detail

getFormulaCreator

public final FormulaCreator<TFormulaInfo,TType,TEnv,TFuncDecl> getFormulaCreator()

getIntegerFormulaManager

public IntegerFormulaManager getIntegerFormulaManager()

Description copied from interface: FormulaManager

Returns the Integer-Theory. Because most SAT-solvers support automatic casting between Integer- and Rational-Theory, the Integer- and the RationalFormulaManager both return the same Formulas for numeric operations like ADD, SUBTRACT, TIMES, LESSTHAN, EQUAL and others.

Specified by:

getIntegerFormulaManager in interface FormulaManager

getRationalFormulaManager

public RationalFormulaManager getRationalFormulaManager()

Description copied from interface: FormulaManager

Returns the Rational-Theory. Because most SAT-solvers support automatic casting between Integer- and Rational-Theory, the Integer- and the RationalFormulaManager both return the same Formulas for numeric operations like ADD, SUBTRACT, TIMES, LESSTHAN, EQUAL, etc.

Specified by:

getRationalFormulaManager in interface FormulaManager

getBooleanFormulaManager

public AbstractBooleanFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> getBooleanFormulaManager()

Description copied from interface: FormulaManager

Returns the Boolean-Theory.

Specified by:

getBooleanFormulaManager in interface FormulaManager

getBitvectorFormulaManager

public AbstractBitvectorFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> getBitvectorFormulaManager()

Description copied from interface: FormulaManager

Returns the Bitvector-Theory.

Specified by:

getBitvectorFormulaManager in interface FormulaManager

getFloatingPointFormulaManager

public FloatingPointFormulaManager getFloatingPointFormulaManager()

Description copied from interface: FormulaManager

Returns the Floating-Point-Theory.

Specified by:

getFloatingPointFormulaManager in interface FormulaManager

getUFManager

public AbstractUFManager<TFormulaInfo,?,TType,TEnv> getUFManager()

Description copied from interface: FormulaManager

Returns the function for dealing with uninterpreted functions (UFs).

Specified by:

getUFManager in interface FormulaManager

getQuantifiedFormulaManager

public AbstractQuantifiedFormulaManager<TFormulaInfo,TType,TEnv,TFuncDecl> getQuantifiedFormulaManager()

Description copied from interface: FormulaManager

Returns the interface for handling quantifiers.

Specified by:

getQuantifiedFormulaManager in interface FormulaManager

getArrayFormulaManager

public ArrayFormulaManager getArrayFormulaManager()

Description copied from interface: FormulaManager

Returns the Array-Theory.

Specified by:

getArrayFormulaManager in interface FormulaManager

dumpFormula

public abstract Appender dumpFormula(TFormulaInfo t)

dumpFormula

public Appender dumpFormula(BooleanFormula t)

Description copied from interface: FormulaManager

Serialize an input formula to an SMT-LIB format. Very useful when passing formulas between different solvers.

To get a String, simply call Object.toString() on the returned object. This method is lazy and does not create an output string until the returned object is actually used.

Specified by:

dumpFormula in interface FormulaManager

Returns:

SMT-LIB formula serialization.

getFormulaType

public final <T extends Formula> FormulaType<T> getFormulaType(T formula)

Description copied from interface: FormulaManager

Returns the type of the given Formula.

Specified by:

getFormulaType in interface FormulaManager

getEnvironment

public final TEnv getEnvironment()

extractInfo

public final TFormulaInfo extractInfo(Formula f)

applyTactic

public BooleanFormula applyTactic(BooleanFormula f,
                                  Tactic tactic)
                           throws InterruptedException

Description copied from interface: FormulaManager

Apply a tactic which performs formula transformation. The available tactics depend on the used solver.

Specified by:

applyTactic in interface FormulaManager

Throws:

InterruptedException

applyUFEImpl

protected BooleanFormula applyUFEImpl(BooleanFormula pF)
                               throws InterruptedException

Parameters:

pF - Input to apply the UFE transformation to.

Throws:

InterruptedException - Can be thrown by the native code.

applyQELightImpl

protected BooleanFormula applyQELightImpl(BooleanFormula pF)
                                   throws InterruptedException

Throws:

InterruptedException - Can be thrown by the native code.

applyCNFImpl

protected BooleanFormula applyCNFImpl(BooleanFormula pF)
                               throws InterruptedException

Parameters:

pF - Input to apply the CNF transformation to.

Throws:

InterruptedException - Can be thrown by the native code.

applyNNFImpl

protected BooleanFormula applyNNFImpl(BooleanFormula input)
                               throws InterruptedException

Throws:

InterruptedException - Can be thrown by the native code.

simplify

public <T extends Formula> T simplify(T f)
                               throws InterruptedException

Description copied from interface: FormulaManager

Simplify an input formula, while ensuring equivalence.

For solvers that do not provide a simplification API, an original formula is returned.

Specified by:

simplify in interface FormulaManager

Parameters:

f - The input formula

Returns:

Simplified version of the formula

Throws:

InterruptedException

simplify

protected TFormulaInfo simplify(TFormulaInfo f)
                         throws InterruptedException

Throws:

InterruptedException - Can be thrown by the native code.

visit

public <R> R visit(Formula input,
                   FormulaVisitor<R> visitor)

Description copied from interface: FormulaManager

Visit the formula with a given visitor.

Specified by:

visit in interface FormulaManager

visitRecursively

public void visitRecursively(Formula pF,
                             FormulaVisitor<TraversalProcess> pFormulaVisitor)

Description copied from interface: FormulaManager

Visit the formula recursively with a given FormulaVisitor.

This method guarantees that the traversal is done iteratively, without using Java recursion, and thus is not prone to StackOverflowErrors.

Furthermore, this method also guarantees that every equal part of the formula is visited only once. Thus it can be used to traverse DAG-like formulas efficiently.

Specified by:

visitRecursively in interface FormulaManager

transformRecursively

public <T extends Formula> T transformRecursively(T f,
                                                  FormulaTransformationVisitor pFormulaVisitor)

Description copied from interface: FormulaManager

Visit the formula recursively with a given FormulaVisitor.

This method guarantees that the traversal is done iteratively, without using Java recursion, and thus is not prone to StackOverflowErrors.

Furthermore, this method also guarantees that every equal part of the formula is visited only once. Thus it can be used to traverse DAG-like formulas efficiently.

Specified by:

transformRecursively in interface FormulaManager

pFormulaVisitor - Transformation described by the user.

extractVariables

public Map<String,Formula> extractVariables(Formula f)

Extract names of all free variables in a formula.

Specified by:

extractVariables in interface FormulaManager

Parameters:

f - The input formula

Returns:

Map from variable names to the corresponding formulas.

extractVariablesAndUFs

public Map<String,Formula> extractVariablesAndUFs(Formula f)

Extract the names of all free variables and UFs in a formula.

Specified by:

extractVariablesAndUFs in interface FormulaManager

Parameters:

f - The input formula

Returns:

Map from variable names to the corresponding formulas. If an UF occurs multiple times in the input formula, an arbitrary instance of an application of this UF is in the map.

translateFrom

public BooleanFormula translateFrom(BooleanFormula other,
                                    FormulaManager otherContext)

Description copied from interface: FormulaManager

Translates the formula from another context into the context represented by this. Default implementation relies on string serialization (FormulaManager.dumpFormula(BooleanFormula) and FormulaManager.parse(String)), but each solver may implement more efficient translation between its own contexts.

Specified by:

translateFrom in interface FormulaManager

Parameters:

other - Formula belonging to otherContext.

otherContext - Formula manager belonging to the other context.

Returns:

Formula belonging to this context.

makeVariable

public <T extends Formula> T makeVariable(FormulaType<T> formulaType,
                                          String name)

Description copied from interface: FormulaManager

Create variable of the type equal to formulaType.

Specified by:

makeVariable in interface FormulaManager

Parameters:

formulaType - the type of the variable.

name - the name of the variable.

Returns:

the created variable.

makeApplication

public <T extends Formula> T makeApplication(FunctionDeclaration<T> declaration,
                                             List<? extends Formula> args)

Description copied from interface: FormulaManager

Create a function application to the given list of arguments.

Specified by:

makeApplication in interface FormulaManager

Parameters:

declaration - Function declaration

args - List of arguments

Returns:

Constructed formula

makeApplication

public <T extends Formula> T makeApplication(FunctionDeclaration<T> declaration,
                                             Formula... args)

Description copied from interface: FormulaManager

Create a function application to the given list of arguments.

Specified by:

makeApplication in interface FormulaManager

Parameters:

declaration - Function declaration

args - List of arguments

Returns:

Constructed formula

substitute

public <T extends Formula> T substitute(T pF,
                                        Map<? extends Formula,? extends Formula> pFromToMapping)

Description copied from interface: FormulaManager

Substitute every occurrence of any item from changeFrom in formula f to the corresponding occurrence from changeTo.

E.g. if changeFrom contains a variable a and changeTo contains a variable b all occurrences of a will be changed to b in the returned formula.

Specified by:

substitute in interface FormulaManager

Parameters:

pF - Formula to change.

pFromToMapping - Mapping of old and new formula parts.

Returns:

Formula with parts replaced.

isValidName

public final boolean isValidName(String pVar)

Check whether the given String can be used as symbol/name for variables or undefined functions. We disallow some keywords from SMTLib2 and other basic operators to be used as symbols.

This method must be kept in sync with checkVariableName(java.lang.String).

Specified by:

isValidName in interface FormulaManager

checkVariableName

public static void checkVariableName(String variableName)

This method is similar to isValidName(java.lang.String) and throws an exception for invalid symbol names. While isValidName(java.lang.String) can be used from users, this method should be used internally to validate user-given symbol names.

This method must be kept in sync with isValidName(java.lang.String).

escape

public final String escape(String pVar)

Description copied from interface: FormulaManager

Get an escaped symbol/name for variables or undefined functions, if necessary.

See FormulaManager.isValidName(String) for further details.

Specified by:

escape in interface FormulaManager

unescape

public final String unescape(String pVar)

Description copied from interface: FormulaManager

Unescape the symbol/name for variables or undefined functions, if necessary.

The result is undefined for Strings that are not properly escaped.

See FormulaManager.isValidName(String) for further details.

Specified by:

unescape in interface FormulaManager