/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:36:31,984 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:36:32,066 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:36:32,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:36:32,095 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:36:32,096 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:36:32,096 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:36:32,097 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:36:32,097 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:36:32,100 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:36:32,100 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:36:32,101 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:36:32,101 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:36:32,102 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:36:32,102 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:36:32,102 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:36:32,102 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:36:32,102 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:36:32,102 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:36:32,102 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:36:32,102 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:36:32,103 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:36:32,103 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:36:32,103 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:36:32,104 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:36:32,104 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:32,104 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:36:32,104 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:36:32,104 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:36:32,104 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:36:32,105 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:36:32,105 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:36:32,105 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:36:32,286 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:36:32,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:36:32,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:36:32,305 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:36:32,305 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:36:32,306 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-17 15:36:33,338 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:36:33,546 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:36:33,547 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-11-17 15:36:33,556 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cde34f9b/4ba63ae649df46609343dceb95d79284/FLAG489ef584c [2023-11-17 15:36:33,567 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cde34f9b/4ba63ae649df46609343dceb95d79284 [2023-11-17 15:36:33,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:36:33,569 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:36:33,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:33,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:36:33,573 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:36:33,575 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,575 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad89414 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33, skipping insertion in model container [2023-11-17 15:36:33,575 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:36:33,822 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-11-17 15:36:33,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:33,851 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:36:33,885 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i[30212,30225] [2023-11-17 15:36:33,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:36:33,918 WARN L675 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:36:33,923 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:36:33,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33 WrapperNode [2023-11-17 15:36:33,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:36:33,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:33,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:36:33,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:36:33,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,940 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,955 INFO L138 Inliner]: procedures = 174, calls = 44, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 151 [2023-11-17 15:36:33,956 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:36:33,956 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:36:33,961 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:36:33,961 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:36:33,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,980 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,980 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,986 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,989 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,990 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,991 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:33,993 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:36:33,994 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:36:33,994 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:36:33,994 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:36:34,001 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (1/1) ... [2023-11-17 15:36:34,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:36:34,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:34,029 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:36:34,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:36:34,051 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:36:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:36:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:36:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:36:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:36:34,052 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:36:34,053 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:36:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:36:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:36:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:36:34,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:36:34,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:36:34,054 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:36:34,147 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:36:34,148 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:36:34,341 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:36:34,388 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:36:34,389 INFO L307 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-17 15:36:34,390 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:34 BoogieIcfgContainer [2023-11-17 15:36:34,390 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:36:34,391 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:36:34,391 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:36:34,393 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:36:34,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:36:33" (1/3) ... [2023-11-17 15:36:34,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e9112c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:34, skipping insertion in model container [2023-11-17 15:36:34,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:36:33" (2/3) ... [2023-11-17 15:36:34,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e9112c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:36:34, skipping insertion in model container [2023-11-17 15:36:34,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:36:34" (3/3) ... [2023-11-17 15:36:34,395 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-11-17 15:36:34,406 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:36:34,406 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:36:34,406 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:36:34,453 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:36:34,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 150 transitions, 307 flow [2023-11-17 15:36:34,548 INFO L124 PetriNetUnfolderBase]: 26/232 cut-off events. [2023-11-17 15:36:34,548 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:34,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 232 events. 26/232 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 664 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2023-11-17 15:36:34,554 INFO L82 GeneralOperation]: Start removeDead. Operand has 138 places, 150 transitions, 307 flow [2023-11-17 15:36:34,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 145 transitions, 294 flow [2023-11-17 15:36:34,568 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:34,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 145 transitions, 294 flow [2023-11-17 15:36:34,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 145 transitions, 294 flow [2023-11-17 15:36:34,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 145 transitions, 294 flow [2023-11-17 15:36:34,628 INFO L124 PetriNetUnfolderBase]: 25/227 cut-off events. [2023-11-17 15:36:34,628 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:34,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 227 events. 25/227 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 606 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2023-11-17 15:36:34,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 4224 [2023-11-17 15:36:37,536 INFO L134 LiptonReduction]: Checked pairs total: 5518 [2023-11-17 15:36:37,537 INFO L136 LiptonReduction]: Total number of compositions: 147 [2023-11-17 15:36:37,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:37,563 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@236566a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:37,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:36:37,566 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:37,566 INFO L124 PetriNetUnfolderBase]: 8/26 cut-off events. [2023-11-17 15:36:37,566 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:37,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:37,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:36:37,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:36:37,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:37,570 INFO L85 PathProgramCache]: Analyzing trace with hash 808012367, now seen corresponding path program 1 times [2023-11-17 15:36:37,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:37,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520601749] [2023-11-17 15:36:37,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:37,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:37,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:37,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:37,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520601749] [2023-11-17 15:36:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520601749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:37,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:37,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:36:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898309885] [2023-11-17 15:36:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:37,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:37,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:37,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:37,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:37,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 297 [2023-11-17 15:36:37,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 32 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:37,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:37,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 297 [2023-11-17 15:36:37,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:37,982 INFO L124 PetriNetUnfolderBase]: 116/264 cut-off events. [2023-11-17 15:36:37,982 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:36:37,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 264 events. 116/264 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 920 event pairs, 38 based on Foata normal form. 15/233 useless extension candidates. Maximal degree in co-relation 473. Up to 136 conditions per place. [2023-11-17 15:36:37,987 INFO L140 encePairwiseOnDemand]: 283/297 looper letters, 25 selfloop transitions, 2 changer transitions 9/38 dead transitions. [2023-11-17 15:36:37,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 38 transitions, 152 flow [2023-11-17 15:36:37,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:38,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-11-17 15:36:38,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624017957351291 [2023-11-17 15:36:38,004 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-11-17 15:36:38,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-11-17 15:36:38,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:38,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-11-17 15:36:38,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:38,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:38,016 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:38,018 INFO L175 Difference]: Start difference. First operand has 25 places, 32 transitions, 68 flow. Second operand 3 states and 412 transitions. [2023-11-17 15:36:38,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 38 transitions, 152 flow [2023-11-17 15:36:38,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:38,021 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 68 flow [2023-11-17 15:36:38,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-11-17 15:36:38,038 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-11-17 15:36:38,038 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 68 flow [2023-11-17 15:36:38,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:38,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:38,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:36:38,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:36:38,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:36:38,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:38,039 INFO L85 PathProgramCache]: Analyzing trace with hash 808041641, now seen corresponding path program 1 times [2023-11-17 15:36:38,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:38,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865311691] [2023-11-17 15:36:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:38,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:38,073 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:38,101 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:38,102 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:38,103 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:36:38,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:36:38,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:36:38,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:36:38,104 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:36:38,106 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:38,106 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:36:38,135 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:36:38,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 176 transitions, 368 flow [2023-11-17 15:36:38,176 INFO L124 PetriNetUnfolderBase]: 43/366 cut-off events. [2023-11-17 15:36:38,177 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:36:38,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 366 events. 43/366 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1353 event pairs, 0 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 234. Up to 9 conditions per place. [2023-11-17 15:36:38,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 176 transitions, 368 flow [2023-11-17 15:36:38,179 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 176 transitions, 368 flow [2023-11-17 15:36:38,179 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:38,179 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 176 transitions, 368 flow [2023-11-17 15:36:38,180 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 176 transitions, 368 flow [2023-11-17 15:36:38,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 176 transitions, 368 flow [2023-11-17 15:36:38,206 INFO L124 PetriNetUnfolderBase]: 43/366 cut-off events. [2023-11-17 15:36:38,206 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:36:38,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378 conditions, 366 events. 43/366 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1353 event pairs, 0 based on Foata normal form. 0/317 useless extension candidates. Maximal degree in co-relation 234. Up to 9 conditions per place. [2023-11-17 15:36:38,211 INFO L119 LiptonReduction]: Number of co-enabled transitions 10128 [2023-11-17 15:36:41,204 INFO L134 LiptonReduction]: Checked pairs total: 14423 [2023-11-17 15:36:41,205 INFO L136 LiptonReduction]: Total number of compositions: 170 [2023-11-17 15:36:41,206 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:41,207 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@236566a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:41,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:36:41,218 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:41,218 INFO L124 PetriNetUnfolderBase]: 8/28 cut-off events. [2023-11-17 15:36:41,218 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:41,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:41,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:36:41,219 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:36:41,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1043078814, now seen corresponding path program 1 times [2023-11-17 15:36:41,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:41,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089466453] [2023-11-17 15:36:41,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:41,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:41,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:41,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089466453] [2023-11-17 15:36:41,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089466453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:41,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:41,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:36:41,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723424516] [2023-11-17 15:36:41,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:41,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:41,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:41,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 346 [2023-11-17 15:36:41,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 47 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:41,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:41,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 346 [2023-11-17 15:36:41,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:41,503 INFO L124 PetriNetUnfolderBase]: 2025/3419 cut-off events. [2023-11-17 15:36:41,503 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-17 15:36:41,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6804 conditions, 3419 events. 2025/3419 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 18187 event pairs, 856 based on Foata normal form. 106/2978 useless extension candidates. Maximal degree in co-relation 2502. Up to 1665 conditions per place. [2023-11-17 15:36:41,513 INFO L140 encePairwiseOnDemand]: 329/346 looper letters, 53 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-11-17 15:36:41,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 62 transitions, 262 flow [2023-11-17 15:36:41,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:41,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 482 transitions. [2023-11-17 15:36:41,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.464354527938343 [2023-11-17 15:36:41,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 482 transitions. [2023-11-17 15:36:41,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 482 transitions. [2023-11-17 15:36:41,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:41,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 482 transitions. [2023-11-17 15:36:41,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:41,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:41,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 346.0) internal successors, (1384), 4 states have internal predecessors, (1384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:41,518 INFO L175 Difference]: Start difference. First operand has 38 places, 47 transitions, 110 flow. Second operand 3 states and 482 transitions. [2023-11-17 15:36:41,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 62 transitions, 262 flow [2023-11-17 15:36:41,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 62 transitions, 262 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:41,520 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 130 flow [2023-11-17 15:36:41,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=346, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-17 15:36:41,521 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-11-17 15:36:41,521 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 130 flow [2023-11-17 15:36:41,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:41,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:41,521 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:36:41,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:36:41,522 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:36:41,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2142191420, now seen corresponding path program 1 times [2023-11-17 15:36:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:41,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022932845] [2023-11-17 15:36:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:41,532 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:41,541 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:41,541 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:41,541 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:36:41,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:36:41,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:36:41,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:36:41,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:36:41,542 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:36:41,542 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:41,542 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:36:41,554 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:36:41,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 202 transitions, 431 flow [2023-11-17 15:36:41,592 INFO L124 PetriNetUnfolderBase]: 65/535 cut-off events. [2023-11-17 15:36:41,592 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:36:41,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 535 events. 65/535 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2225 event pairs, 1 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 374. Up to 16 conditions per place. [2023-11-17 15:36:41,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 186 places, 202 transitions, 431 flow [2023-11-17 15:36:41,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 186 places, 202 transitions, 431 flow [2023-11-17 15:36:41,596 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:41,596 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 186 places, 202 transitions, 431 flow [2023-11-17 15:36:41,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 186 places, 202 transitions, 431 flow [2023-11-17 15:36:41,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 186 places, 202 transitions, 431 flow [2023-11-17 15:36:41,632 INFO L124 PetriNetUnfolderBase]: 65/535 cut-off events. [2023-11-17 15:36:41,632 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:36:41,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 560 conditions, 535 events. 65/535 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2225 event pairs, 1 based on Foata normal form. 0/463 useless extension candidates. Maximal degree in co-relation 374. Up to 16 conditions per place. [2023-11-17 15:36:41,643 INFO L119 LiptonReduction]: Number of co-enabled transitions 17136 [2023-11-17 15:36:44,691 INFO L134 LiptonReduction]: Checked pairs total: 25137 [2023-11-17 15:36:44,691 INFO L136 LiptonReduction]: Total number of compositions: 196 [2023-11-17 15:36:44,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:44,698 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@236566a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:44,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:36:44,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:44,700 INFO L124 PetriNetUnfolderBase]: 10/32 cut-off events. [2023-11-17 15:36:44,700 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:44,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:44,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:36:44,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:36:44,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1388168501, now seen corresponding path program 1 times [2023-11-17 15:36:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:44,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104732038] [2023-11-17 15:36:44,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:44,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:44,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:44,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:44,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104732038] [2023-11-17 15:36:44,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104732038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:44,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:44,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:36:44,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386524275] [2023-11-17 15:36:44,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:44,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:44,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:44,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:44,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:44,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 398 [2023-11-17 15:36:44,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 60 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:44,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:44,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 398 [2023-11-17 15:36:44,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:46,696 INFO L124 PetriNetUnfolderBase]: 20351/29670 cut-off events. [2023-11-17 15:36:46,696 INFO L125 PetriNetUnfolderBase]: For 844/844 co-relation queries the response was YES. [2023-11-17 15:36:46,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59219 conditions, 29670 events. 20351/29670 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 178760 event pairs, 9022 based on Foata normal form. 698/25874 useless extension candidates. Maximal degree in co-relation 6391. Up to 16734 conditions per place. [2023-11-17 15:36:46,827 INFO L140 encePairwiseOnDemand]: 376/398 looper letters, 68 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2023-11-17 15:36:46,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 332 flow [2023-11-17 15:36:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:36:46,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:36:46,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-11-17 15:36:46,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623115577889447 [2023-11-17 15:36:46,873 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-11-17 15:36:46,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-11-17 15:36:46,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:46,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-11-17 15:36:46,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:46,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:46,877 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 398.0) internal successors, (1592), 4 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:46,877 INFO L175 Difference]: Start difference. First operand has 47 places, 60 transitions, 147 flow. Second operand 3 states and 552 transitions. [2023-11-17 15:36:46,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 332 flow [2023-11-17 15:36:46,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 76 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:36:46,879 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 151 flow [2023-11-17 15:36:46,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-11-17 15:36:46,880 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-11-17 15:36:46,880 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 151 flow [2023-11-17 15:36:46,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:46,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:46,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:36:46,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:36:46,880 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:36:46,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:46,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1170108393, now seen corresponding path program 1 times [2023-11-17 15:36:46,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:46,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810140849] [2023-11-17 15:36:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810140849] [2023-11-17 15:36:46,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810140849] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:36:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847230673] [2023-11-17 15:36:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:46,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:36:46,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:36:46,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:36:46,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:36:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:47,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:36:47,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:36:47,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:47,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:36:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:47,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847230673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:36:47,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:36:47,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:36:47,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563135117] [2023-11-17 15:36:47,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:36:47,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:36:47,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:47,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:36:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:36:47,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 398 [2023-11-17 15:36:47,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 151 flow. Second operand has 7 states, 7 states have (on average 150.85714285714286) internal successors, (1056), 7 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:47,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:47,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 398 [2023-11-17 15:36:47,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:36:47,264 INFO L124 PetriNetUnfolderBase]: 1600/2635 cut-off events. [2023-11-17 15:36:47,264 INFO L125 PetriNetUnfolderBase]: For 834/834 co-relation queries the response was YES. [2023-11-17 15:36:47,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 2635 events. 1600/2635 cut-off events. For 834/834 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13557 event pairs, 0 based on Foata normal form. 0/2634 useless extension candidates. Maximal degree in co-relation 5281. Up to 1512 conditions per place. [2023-11-17 15:36:47,272 INFO L140 encePairwiseOnDemand]: 395/398 looper letters, 52 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-11-17 15:36:47,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 58 transitions, 254 flow [2023-11-17 15:36:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:36:47,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:36:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 948 transitions. [2023-11-17 15:36:47,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969849246231156 [2023-11-17 15:36:47,274 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 948 transitions. [2023-11-17 15:36:47,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 948 transitions. [2023-11-17 15:36:47,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:36:47,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 948 transitions. [2023-11-17 15:36:47,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 158.0) internal successors, (948), 6 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:47,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:47,280 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 398.0) internal successors, (2786), 7 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:47,280 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 151 flow. Second operand 6 states and 948 transitions. [2023-11-17 15:36:47,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 58 transitions, 254 flow [2023-11-17 15:36:47,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 58 transitions, 245 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 15:36:47,283 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 75 flow [2023-11-17 15:36:47,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=398, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=75, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2023-11-17 15:36:47,284 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -11 predicate places. [2023-11-17 15:36:47,284 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 75 flow [2023-11-17 15:36:47,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 150.85714285714286) internal successors, (1056), 7 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:47,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:47,284 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:36:47,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:36:47,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 15:36:47,509 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:36:47,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:47,509 INFO L85 PathProgramCache]: Analyzing trace with hash -105077636, now seen corresponding path program 1 times [2023-11-17 15:36:47,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:47,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994791579] [2023-11-17 15:36:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:47,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:47,522 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:36:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:36:47,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:36:47,530 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:36:47,530 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:36:47,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:36:47,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:36:47,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:36:47,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:36:47,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:36:47,531 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:36:47,532 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:36:47,532 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:36:47,546 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:36:47,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 228 transitions, 496 flow [2023-11-17 15:36:47,611 INFO L124 PetriNetUnfolderBase]: 99/776 cut-off events. [2023-11-17 15:36:47,611 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:36:47,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 776 events. 99/776 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3534 event pairs, 6 based on Foata normal form. 0/673 useless extension candidates. Maximal degree in co-relation 555. Up to 32 conditions per place. [2023-11-17 15:36:47,616 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 228 transitions, 496 flow [2023-11-17 15:36:47,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 228 transitions, 496 flow [2023-11-17 15:36:47,619 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:36:47,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 228 transitions, 496 flow [2023-11-17 15:36:47,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 228 transitions, 496 flow [2023-11-17 15:36:47,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 228 transitions, 496 flow [2023-11-17 15:36:47,710 INFO L124 PetriNetUnfolderBase]: 99/776 cut-off events. [2023-11-17 15:36:47,710 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:36:47,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 827 conditions, 776 events. 99/776 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3534 event pairs, 6 based on Foata normal form. 0/673 useless extension candidates. Maximal degree in co-relation 555. Up to 32 conditions per place. [2023-11-17 15:36:47,723 INFO L119 LiptonReduction]: Number of co-enabled transitions 25440 [2023-11-17 15:36:50,941 INFO L134 LiptonReduction]: Checked pairs total: 39375 [2023-11-17 15:36:50,941 INFO L136 LiptonReduction]: Total number of compositions: 220 [2023-11-17 15:36:50,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:36:50,943 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@236566a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:36:50,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:36:50,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:36:50,946 INFO L124 PetriNetUnfolderBase]: 10/32 cut-off events. [2023-11-17 15:36:50,946 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:36:50,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:36:50,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:36:50,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:36:50,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:36:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash -252218463, now seen corresponding path program 1 times [2023-11-17 15:36:50,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:36:50,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195704534] [2023-11-17 15:36:50,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:36:50,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:36:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:36:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:36:51,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:36:51,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195704534] [2023-11-17 15:36:51,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195704534] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:36:51,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:36:51,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:36:51,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346874173] [2023-11-17 15:36:51,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:36:51,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:36:51,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:36:51,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:36:51,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:36:51,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 448 [2023-11-17 15:36:51,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:36:51,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:36:51,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 448 [2023-11-17 15:36:51,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:07,747 INFO L124 PetriNetUnfolderBase]: 218828/296451 cut-off events. [2023-11-17 15:37:07,748 INFO L125 PetriNetUnfolderBase]: For 9819/9819 co-relation queries the response was YES. [2023-11-17 15:37:08,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592998 conditions, 296451 events. 218828/296451 cut-off events. For 9819/9819 co-relation queries the response was YES. Maximal size of possible extension queue 5324. Compared 2007404 event pairs, 103710 based on Foata normal form. 5247/262665 useless extension candidates. Maximal degree in co-relation 63616. Up to 146282 conditions per place. [2023-11-17 15:37:09,090 INFO L140 encePairwiseOnDemand]: 421/448 looper letters, 80 selfloop transitions, 6 changer transitions 0/90 dead transitions. [2023-11-17 15:37:09,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 90 transitions, 404 flow [2023-11-17 15:37:09,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 616 transitions. [2023-11-17 15:37:09,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2023-11-17 15:37:09,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 616 transitions. [2023-11-17 15:37:09,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 616 transitions. [2023-11-17 15:37:09,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:09,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 616 transitions. [2023-11-17 15:37:09,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:09,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:09,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 448.0) internal successors, (1792), 4 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:09,096 INFO L175 Difference]: Start difference. First operand has 56 places, 70 transitions, 180 flow. Second operand 3 states and 616 transitions. [2023-11-17 15:37:09,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 90 transitions, 404 flow [2023-11-17 15:37:09,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 90 transitions, 404 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:09,101 INFO L231 Difference]: Finished difference. Result has 60 places, 58 transitions, 198 flow [2023-11-17 15:37:09,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=60, PETRI_TRANSITIONS=58} [2023-11-17 15:37:09,103 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-11-17 15:37:09,103 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 58 transitions, 198 flow [2023-11-17 15:37:09,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:09,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:09,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:09,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:37:09,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:37:09,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:09,105 INFO L85 PathProgramCache]: Analyzing trace with hash 875650233, now seen corresponding path program 1 times [2023-11-17 15:37:09,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:09,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531695941] [2023-11-17 15:37:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:09,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:09,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:09,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:09,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531695941] [2023-11-17 15:37:09,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531695941] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:09,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666741507] [2023-11-17 15:37:09,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:09,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:09,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:09,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:37:09,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 15:37:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:09,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:09,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:09,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:09,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666741507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:09,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:09,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:37:09,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413030881] [2023-11-17 15:37:09,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:09,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:37:09,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:37:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:37:09,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 448 [2023-11-17 15:37:09,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:09,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:09,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 448 [2023-11-17 15:37:09,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:23,892 INFO L124 PetriNetUnfolderBase]: 204620/279906 cut-off events. [2023-11-17 15:37:23,892 INFO L125 PetriNetUnfolderBase]: For 71752/71752 co-relation queries the response was YES. [2023-11-17 15:37:24,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 626929 conditions, 279906 events. 204620/279906 cut-off events. For 71752/71752 co-relation queries the response was YES. Maximal size of possible extension queue 4959. Compared 1896391 event pairs, 30090 based on Foata normal form. 0/261708 useless extension candidates. Maximal degree in co-relation 149049. Up to 259035 conditions per place. [2023-11-17 15:37:25,079 INFO L140 encePairwiseOnDemand]: 444/448 looper letters, 105 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-11-17 15:37:25,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 115 transitions, 548 flow [2023-11-17 15:37:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:37:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:37:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1094 transitions. [2023-11-17 15:37:25,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069940476190476 [2023-11-17 15:37:25,082 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1094 transitions. [2023-11-17 15:37:25,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1094 transitions. [2023-11-17 15:37:25,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:25,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1094 transitions. [2023-11-17 15:37:25,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.33333333333334) internal successors, (1094), 6 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:25,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:25,087 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 448.0) internal successors, (3136), 7 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:25,087 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 198 flow. Second operand 6 states and 1094 transitions. [2023-11-17 15:37:25,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 115 transitions, 548 flow [2023-11-17 15:37:25,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 115 transitions, 536 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:37:25,282 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 228 flow [2023-11-17 15:37:25,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=448, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=228, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-17 15:37:25,283 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-11-17 15:37:25,283 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 228 flow [2023-11-17 15:37:25,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 166.85714285714286) internal successors, (1168), 7 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:25,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:25,284 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:25,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 15:37:25,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-17 15:37:25,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:37:25,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1194221807, now seen corresponding path program 1 times [2023-11-17 15:37:25,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:25,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30846551] [2023-11-17 15:37:25,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:25,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:25,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:25,520 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:25,521 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:25,521 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:37:25,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:37:25,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:37:25,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:37:25,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:37:25,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:37:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:37:25,522 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:37:25,525 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:25,525 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:37:25,548 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-17 15:37:25,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 254 transitions, 563 flow [2023-11-17 15:37:25,883 INFO L124 PetriNetUnfolderBase]: 161/1165 cut-off events. [2023-11-17 15:37:25,884 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:37:25,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 1165 events. 161/1165 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5925 event pairs, 23 based on Foata normal form. 0/1015 useless extension candidates. Maximal degree in co-relation 821. Up to 80 conditions per place. [2023-11-17 15:37:25,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 254 transitions, 563 flow [2023-11-17 15:37:25,895 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 254 transitions, 563 flow [2023-11-17 15:37:25,895 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:25,895 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 234 places, 254 transitions, 563 flow [2023-11-17 15:37:25,896 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 234 places, 254 transitions, 563 flow [2023-11-17 15:37:25,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 254 transitions, 563 flow [2023-11-17 15:37:25,978 INFO L124 PetriNetUnfolderBase]: 161/1165 cut-off events. [2023-11-17 15:37:25,979 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-17 15:37:25,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1271 conditions, 1165 events. 161/1165 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 5925 event pairs, 23 based on Foata normal form. 0/1015 useless extension candidates. Maximal degree in co-relation 821. Up to 80 conditions per place. [2023-11-17 15:37:26,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 35040 [2023-11-17 15:37:29,912 INFO L134 LiptonReduction]: Checked pairs total: 58749 [2023-11-17 15:37:29,912 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-11-17 15:37:29,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:29,914 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@236566a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:29,914 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:37:29,915 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:29,915 INFO L124 PetriNetUnfolderBase]: 9/31 cut-off events. [2023-11-17 15:37:29,915 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:29,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:29,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-17 15:37:29,916 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:37:29,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:29,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1792641765, now seen corresponding path program 1 times [2023-11-17 15:37:29,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:29,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535343985] [2023-11-17 15:37:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:29,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:29,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:29,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535343985] [2023-11-17 15:37:29,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535343985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:29,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:29,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:37:29,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623685830] [2023-11-17 15:37:29,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:29,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:29,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:29,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:29,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:29,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 503 [2023-11-17 15:37:29,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 78 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:29,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:29,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 503 [2023-11-17 15:37:29,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand