Package daikon.inv.unary.sequence
Class SeqIndexFloatLessThan
- Object
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- Invariant
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- UnaryInvariant
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- SingleSequence
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- SingleFloatSequence
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- SeqIndexFloatLessThan
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- All Implemented Interfaces:
Serializable
,Cloneable
public class SeqIndexFloatLessThan extends SingleFloatSequence
Represents an invariant over sequences of double values between the index of an element of the sequence and the element itself. Prints asx[i] < i
.- 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 SingleSequence
dkconfig_SeqIndexDisableAll
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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
SeqIndexFloatLessThan(PptSlice slice)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description InvariantStatus
add_modified(double @Interned [] a, int count)
Similar toSingleFloatSequence.check_modified(double[], int)
except that it can change the state of the invariant if necessary.InvariantStatus
check_modified(double @Interned [] a, 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 we are enabledstatic @Nullable SeqIndexFloatLessThan
find(PptSlice ppt)
String
format_csharp_contract()
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 the ni-suppressions for SeqIndexFloatLessThanstatic SeqIndexFloatLessThan
get_proto()
Returns the prototype invariant for SeqIndexFloatLessThanString
getComparator()
SeqIndexFloatLessThan
instantiate_dyn(PptSlice slice)
Instantiate the invariant on the specified slice.boolean
instantiate_ok(VarInfo[] vis)
Check that SeqIndex comparisons make sense over these vars.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)
Checks to see if this is obvious over the specified variables Implements the following checks:boolean
isSameFormula(Invariant other)
Returns true iff the two invariants represent the same mathematical formula.protected Invariant
resurrect_done_swapped()
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Methods inherited from class SingleFloatSequence
add, add_unmodified, check, check_unmodified, valid_types
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Methods inherited from class SingleSequence
var
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Methods inherited from class UnaryInvariant
resurrect_done
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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, 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, 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 SeqIndexFloatLessThan invariants should be considered.
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Constructor Detail
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SeqIndexFloatLessThan
protected SeqIndexFloatLessThan(PptSlice slice)
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Method Detail
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get_proto
public static SeqIndexFloatLessThan get_proto()
Returns the prototype invariant for SeqIndexFloatLessThan
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enabled
public boolean enabled()
returns whether or not we are enabled
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instantiate_ok
public boolean instantiate_ok(VarInfo[] vis)
Check that SeqIndex comparisons make sense over these vars.- Overrides:
instantiate_ok
in classInvariant
- See Also:
Invariant.valid_types(VarInfo[])
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instantiate_dyn
public SeqIndexFloatLessThan instantiate_dyn( SeqIndexFloatLessThan this, PptSlice slice)
Instantiate the invariant on the specified slice.- Specified by:
instantiate_dyn
in classInvariant
- Returns:
- the new invariant
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get_ni_suppressions
@Pure public @Nullable NISuppressionSet get_ni_suppressions()
returns the ni-suppressions for SeqIndexFloatLessThan- Overrides:
get_ni_suppressions
in classInvariant
- Returns:
- the set of non-instantiating suppressions for this invariant
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resurrect_done_swapped
protected Invariant resurrect_done_swapped()
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getComparator
public String getComparator()
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format_using
@SideEffectFree public String format_using(@GuardSatisfied SeqIndexFloatLessThan 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 SeqIndexFloatLessThan this)
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format_esc
public String format_esc(@GuardSatisfied SeqIndexFloatLessThan this)
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format_csharp_contract
public String format_csharp_contract(@GuardSatisfied SeqIndexFloatLessThan this)
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format_java_family
public String format_java_family(@GuardSatisfied SeqIndexFloatLessThan this, OutputFormat format)
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format_simplify
public String format_simplify(@GuardSatisfied SeqIndexFloatLessThan this)
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check_modified
public InvariantStatus check_modified(double @Interned [] a, int count)
Description copied from class:SingleFloatSequence
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 classSingleFloatSequence
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(double @Interned [] a, int count)
Description copied from class:SingleFloatSequence
Similar toSingleFloatSequence.check_modified(double[], int)
except that it can change the state of the invariant if necessary. If the invariant doesn't have any state, then the implementation should simply callSingleFloatSequence.check_modified(double[], int)
. This method need not check for falsification; that is done by the caller.- Specified by:
add_modified
in classSingleFloatSequence
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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.
- Specified by:
computeConfidence
in classInvariant
- Returns:
- confidence of this invariant
- See Also:
Invariant.getConfidence()
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isSameFormula
@Pure public boolean isSameFormula(Invariant other)
Description copied from class:Invariant
Returns true iff the two invariants represent the same mathematical formula. Does not consider the context such as variable names, confidences, sample counts, value counts, or related quantities. As a rule of thumb, if two invariants format the same, this method returns true. Furthermore, in many cases, if an invariant does not involve computed constants (as "x>c" and "y=ax+b" do for constants a, b, and c), then this method vacuously returns true.- Specified by:
isSameFormula
in classInvariant
- 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 SeqIndexFloatLessThan find(PptSlice ppt)
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isObviousDynamically
@Pure public @Nullable DiscardInfo isObviousDynamically(VarInfo[] vis)
Checks to see if this is obvious over the specified variables Implements the following checks:(A[] subsequence B[]) ^ (B[i] op i) ⇒ A[i] op i
JHP: Its not obvious (to me) that this is true except when the subsequence starts at index 0. If B[] = {0, 1, 2, 3, 4} and A[] = {2, 3, 4}, A[] is a subsequence of B[] and B[i] == i, but A[i] = i is not true.- Overrides:
isObviousDynamically
in classInvariant
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