Package daikon.inv.binary.twoSequence
Class PairwiseIntEqual
- Object
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- Invariant
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- BinaryInvariant
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- TwoSequence
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- PairwiseIntEqual
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- All Implemented Interfaces:
Serializable
,Cloneable
public class PairwiseIntEqual extends TwoSequence
Represents an invariant between corresponding elements of two sequences of long values. The length of the sequences must match for the invariant to hold. A comparison is made over each(x[i], y[i])
pair. Thus,x[0]
is compared toy[0]
,x[1]
toy[1]
, and so forth. Prints asx[] == y[]
.- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class Invariant
Invariant.ClassVarnameComparator, Invariant.ClassVarnameFormulaComparator, Invariant.InvariantComparatorForPrinting, Invariant.Match
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Field Summary
Fields Modifier and Type Field Description static Logger
debug
Debug tracer.static boolean
dkconfig_enabled
Boolean.-
Fields inherited from class TwoSequence
swap
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Fields inherited from class Invariant
CONFIDENCE_JUSTIFIED, CONFIDENCE_NEVER, CONFIDENCE_UNJUSTIFIED, debugFlow, debugGuarding, debugIsObvious, debugIsWorthPrinting, debugPrint, debugPrintEquality, dkconfig_confidence_limit, dkconfig_fuzzy_ratio, dkconfig_simplify_define_predicates, falsified, invariantEnabledDefault, isGuardingPredicate, min_mod_non_missing_samples, ppt, PROBABILITY_JUSTIFIED, PROBABILITY_NEVER, PROBABILITY_UNJUSTIFIED
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Constructor Summary
Constructors Modifier Constructor Description protected
PairwiseIntEqual()
protected
PairwiseIntEqual(PptSlice ppt)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description InvariantStatus
add_modified(long @Interned [] a1, long @Interned [] a2, int count)
Default implementation simply calls check.InvariantStatus
check_modified(long @Interned [] a1, long @Interned [] a2, int count)
Presents a sample to the invariant.protected double
computeConfidence()
This method computes the confidence that this invariant occurred by chance.boolean
enabled()
Returns whether or not this invariant is enabled.static @Nullable PairwiseIntEqual
find(PptSlice ppt)
String
format_csharp()
String
format_daikon()
String
format_esc()
String
format_java_family(OutputFormat format)
String
format_simplify()
String
format_using(OutputFormat format)
Return a printed representation of this invariant, in the given format.@Nullable NISuppressionSet
get_ni_suppressions()
Returns a list of non-instantiating suppressions for this invariant.static PairwiseIntEqual
get_proto()
Returns the prototype invariant for PairwiseIntEqualString
getComparator()
protected PairwiseIntEqual
instantiate_dyn(PptSlice slice)
instantiates the invariant on the specified sliceboolean
instantiate_ok(VarInfo[] vis)
PairwiseIntEqual is only valid on integral types.boolean
is_symmetric()
Returns true if the binary function is symmetric (x,y ⇒ y,x).boolean
isExclusiveFormula(Invariant other)
Returns true iff the two invariants represent mutually exclusive mathematical formulas -- that is, if one of them is true, then the other must be false.@Nullable DiscardInfo
isObviousDynamically(VarInfo[] vis)
Return non-null if this invariant is necessarily true from a fact that can be determined dynamically (after checking data) -- for the given varInfos rather than the varInfos of this.@Nullable DiscardInfo
isObviousStatically(VarInfo[] vis)
Return true if this invariant is necessarily true from a fact that can be determined statically -- for the given varInfos rather than the varInfos of this.boolean
isSameFormula(Invariant other)
Return true if both invariants are the same class and the order of the variables (swap) is the same.String
repr()
Returns a representation of the class.protected Invariant
resurrect_done_swapped()
Swaps the variables by inverting the state of swap.-
Methods inherited from class TwoSequence
add, add_unmodified, check, check_unmodified, get_swap, resurrect_done, resurrect_done_unswapped, valid_types, var1, var1, var2, var2
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Methods inherited from class BinaryInvariant
add_unordered, check_unordered, find
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Methods inherited from class Invariant
add_sample, asInvClass, checkRep, clear_falsified, clone, clone_and_permute, conf_is_ge, confidence_and, confidence_and, confidence_or, createGuardedInvariant, createGuardingPredicate, enoughSamples, falsify, find, format, format_classname, format_too_few_samples, format_unimplemented, formatFuzzy, get_comparability, getConfidence, getGuardingList, getGuardingList, hasUninterestingConstant, instantiate, is_false, is_ni_suppressed, isActive, isAllPrestate, isEqualityComparison, isExact, isObvious, isObviousDynamically, isObviousDynamically_SomeInEquality, isObviousDynamically_SomeInEqualityHelper, isObviousStatically, isObviousStatically_AllInEquality, isObviousStatically_SomeInEquality, isObviousStatically_SomeInEqualityHelper, isReflexive, isSameInvariant, isValidEscExpression, isValidExpression, isWorthPrinting, justified, log, log, logDetail, logOn, match, merge, mergeFormulasOk, permute, prob_and, prob_and, prob_is_ge, prob_or, repCheck, repr_prob, resurrect, simplify_format_double, simplify_format_long, simplify_format_string, state_match, toString, toString, transfer, usesVar, usesVar, usesVarDerived, varNames
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Field Detail
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dkconfig_enabled
public static boolean dkconfig_enabled
Boolean. True iff PairwiseIntComparison invariants should be considered.
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Constructor Detail
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PairwiseIntEqual
protected PairwiseIntEqual(PptSlice ppt)
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PairwiseIntEqual
protected PairwiseIntEqual()
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Method Detail
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get_proto
public static PairwiseIntEqual get_proto()
Returns the prototype invariant for PairwiseIntEqual
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enabled
public boolean enabled()
Returns whether or not this invariant is enabled.
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instantiate_ok
public boolean instantiate_ok(VarInfo[] vis)
PairwiseIntEqual is only valid on integral types.- Overrides:
instantiate_ok
in classInvariant
- See Also:
Invariant.valid_types(VarInfo[])
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instantiate_dyn
protected PairwiseIntEqual instantiate_dyn( PairwiseIntEqual this, PptSlice slice)
instantiates the invariant on the specified slice- Specified by:
instantiate_dyn
in classInvariant
- Returns:
- the new invariant
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isObviousStatically
@Pure public @Nullable DiscardInfo isObviousStatically(VarInfo[] vis)
Description copied from class:Invariant
Return true if this invariant is necessarily true from a fact that can be determined statically -- for the given varInfos rather than the varInfos of this. Conceptually, this means "is this invariant statically obvious if its VarInfos were switched with vis?" Intended to be overridden by subclasses. Should only do static checking.Precondition: vis.length == this.ppt.var_infos.length
- Overrides:
isObviousStatically
in classInvariant
- Parameters:
vis
- the VarInfos this invariant is obvious over. The position and data type of the variables is the *same* as that of this.ppt.var_infos.
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isObviousDynamically
@Pure public @Nullable DiscardInfo isObviousDynamically(VarInfo[] vis)
Description copied from class:Invariant
Return non-null if this invariant is necessarily true from a fact that can be determined dynamically (after checking data) -- for the given varInfos rather than the varInfos of this. Conceptually, this means, "Is this invariant dynamically obvious if its VarInfos were switched with vis?" Intended to be overriden by subclasses so they can filter invariants after checking; the overriding method should first call "super.isObviousDynamically(vis)". Since this method is dynamic, it should only be called after all processing.- Overrides:
isObviousDynamically
in classInvariant
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resurrect_done_swapped
protected Invariant resurrect_done_swapped()
Description copied from class:TwoSequence
Swaps the variables by inverting the state of swap.- Overrides:
resurrect_done_swapped
in classTwoSequence
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is_symmetric
@Pure public boolean is_symmetric()
Description copied from class:BinaryInvariant
Returns true if the binary function is symmetric (x,y ⇒ y,x). Subclasses that are symmetric should override.- Overrides:
is_symmetric
in classBinaryInvariant
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repr
public String repr(@GuardSatisfied PairwiseIntEqual this)
Description copied from class:TwoSequence
Returns a representation of the class. This includes the classname, variables, and swap state.- Overrides:
repr
in classTwoSequence
- Returns:
- a string representation of this
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getComparator
public String getComparator()
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format_using
@SideEffectFree public String format_using(@GuardSatisfied PairwiseIntEqual this, OutputFormat format)
Description copied from class:Invariant
Return a printed representation of this invariant, in the given format.- Specified by:
format_using
in classInvariant
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format_daikon
public String format_daikon(@GuardSatisfied PairwiseIntEqual this)
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format_esc
public String format_esc(@GuardSatisfied PairwiseIntEqual this)
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format_simplify
public String format_simplify(@GuardSatisfied PairwiseIntEqual this)
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format_java_family
public String format_java_family(@GuardSatisfied PairwiseIntEqual this, OutputFormat format)
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format_csharp
public String format_csharp(@GuardSatisfied PairwiseIntEqual this)
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check_modified
public InvariantStatus check_modified(long @Interned [] a1, long @Interned [] a2, int count)
Description copied from class:TwoSequence
Presents a sample to the invariant. Returns whether the sample is consistent with the invariant. Does not change the state of the invariant.- Specified by:
check_modified
in classTwoSequence
count
- how many identical samples were observed in a row. For example, three calls to check_modified with a count parameter of 1 is equivalent to one call to check_modified with a count parameter of 3.- Returns:
- whether or not the sample is consistent with the invariant
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add_modified
public InvariantStatus add_modified(long @Interned [] a1, long @Interned [] a2, int count)
Description copied from class:TwoSequence
Default implementation simply calls check. Subclasses can override.- Overrides:
add_modified
in classTwoSequence
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computeConfidence
protected double computeConfidence()
Description copied from class:Invariant
This method computes the confidence that this invariant occurred by chance. Clients should callInvariant.getConfidence()
instead.This method need not check the value of field "falsified", as the caller does that.
- Overrides:
computeConfidence
in classTwoSequence
- Returns:
- confidence of this invariant
- See Also:
Invariant.getConfidence()
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isSameFormula
@Pure public boolean isSameFormula(Invariant other)
Description copied from class:TwoSequence
Return true if both invariants are the same class and the order of the variables (swap) is the same.- Overrides:
isSameFormula
in classTwoSequence
- Parameters:
other
- the invariant to compare to this one- Returns:
- true iff the two invariants represent the same mathematical formula. Does not consider
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isExclusiveFormula
@Pure public boolean isExclusiveFormula(Invariant other)
Description copied from class:Invariant
Returns true iff the two invariants represent mutually exclusive mathematical formulas -- that is, if one of them is true, then the other must be false. This method does not consider the context such as variable names, confidences, sample counts, value counts, or related quantities.- Overrides:
isExclusiveFormula
in classInvariant
- Parameters:
other
- the other invariant to compare to this one- Returns:
- true iff the two invariants represent mutually exclusive mathematical formulas
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find
public static @Nullable PairwiseIntEqual find(PptSlice ppt)
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get_ni_suppressions
@Pure public @Nullable NISuppressionSet get_ni_suppressions()
Returns a list of non-instantiating suppressions for this invariant.- Overrides:
get_ni_suppressions
in classInvariant
- Returns:
- the set of non-instantiating suppressions for this invariant
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