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1、AbstractAlongwiththeincreasingscaleofsoftwaresystem,itbecomesmoreandmoredifficulttoensurethequalityofthesoftware.Theprobabilityofthesoftwarefailurealsoincreases.Thesoftwarefailuremeansthatthesoftwareexpectedoutcomeisdifferentfromtheactualoutcome.Afte
2、rthesoftwarefailureoccurred，howtolocatethefaultystatementswhichcontainbugsiswhatfaultlocalizationneedstosolve.Nowtherearemanyexcellentsoftwarefaultlocalizationtechniques.However,theyallignorethecoincidentalcorrectnesswhichmeansexecutionresultsoftestc
3、asesthatexecutefaultystatementsindicatenofailureinformation.Thecoincidentalcorrectnessisalwayscausedbythefaultpropagation.Basedontheaboveconsiderations,thispaperdividesthefaultlocalizationintotwosteps,includingfault-relatedstatementslocalizationandfa
4、ultcomprehension.Theresearchcontentsofthispaperinclude:Firstly,inordertogettheexecutionpathinformationoftheprogramastheinputofsubsequentmodules,programinstrumentationisneeded.However,existingprograminstrumentationmethodsaretoocomplex.Inthispaper,weus
5、elexicalanalysisandsyntaxanalysistorealizeasimpleandconvenientprograminstrumentationmethod.Secondly,inordertodothefault-relatedstatementslocalization,combineddependencenetworkmustbecreated.Soitisnecessarytodoprogramdependenceanalysisandcreateprogramd
6、ependencegraphandtransferit.Inthispaper,werealizethetraditionalmethodoftheprogramdependenceanalysis.Basedonthis,wecreateprogramdependencegraph,transfersomespecificnodesanddothestatespecification.Thirdly,existingfaultlocalizationmethodsnotonlycannotac
7、curatelylocatethefaultinmostcasesbutalsocannotlocatethefault-relatedstatements.Soweproposeconditionalprobability,pathprobabilityandcombineddependenceprobabilitytoenhancetheaccuracyoffault-relatedstatementslocalization.Intheend,coincidentalcorrectness
8、sharplyaffecttheresultoffaultlocalization.Existingfaultlocalizationmethodsdicinggraspitsessence.Soweproposethefaultcomprehensionbasedonfaultpropagationcontextanalysistoeliminateitseffect・Themethodgeneratesarankedlistofsuspiciousnessscoreofallstatemen
