/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:14:41,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:14:41,265 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-NoLbe.epf [2023-12-05 21:14:41,298 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:14:41,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:14:41,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:14:41,300 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:14:41,300 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:14:41,300 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:14:41,303 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:14:41,303 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:14:41,303 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:14:41,304 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:14:41,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:14:41,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:14:41,305 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:14:41,305 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:14:41,305 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:14:41,305 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:14:41,306 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:14:41,306 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:14:41,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:14:41,307 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:14:41,307 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:14:41,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:14:41,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:14:41,307 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:14:41,307 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:14:41,307 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:14:41,308 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:14:41,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:14:41,308 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:14:41,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:14:41,309 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:14:41,489 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:14:41,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:14:41,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:14:41,514 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:14:41,514 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:14:41,515 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-12-05 21:14:42,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:14:42,776 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:14:42,776 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_09-ptrmunge_racing.i [2023-12-05 21:14:42,796 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a94cb30a/7f934731d7f5491089cf62a9101bafd0/FLAG1c862f940 [2023-12-05 21:14:42,806 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a94cb30a/7f934731d7f5491089cf62a9101bafd0 [2023-12-05 21:14:42,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:14:42,809 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:14:42,810 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:14:42,810 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:14:42,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:14:42,813 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:14:42" (1/1) ... [2023-12-05 21:14:42,822 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5efb7792 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:42, skipping insertion in model container [2023-12-05 21:14:42,822 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:14:42" (1/1) ... [2023-12-05 21:14:42,853 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:14:43,107 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:14:43,124 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:14:43,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:14:43,185 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:14:43,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43 WrapperNode [2023-12-05 21:14:43,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:14:43,186 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:14:43,187 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:14:43,187 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:14:43,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,202 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,222 INFO L138 Inliner]: procedures = 173, calls = 55, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 251 [2023-12-05 21:14:43,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:14:43,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:14:43,223 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:14:43,223 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:14:43,230 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,237 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,237 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,245 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,248 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,250 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,251 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,254 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:14:43,254 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:14:43,254 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:14:43,254 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:14:43,255 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (1/1) ... [2023-12-05 21:14:43,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:14:43,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:14:43,286 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) [2023-12-05 21:14:43,304 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 [2023-12-05 21:14:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:14:43,309 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-12-05 21:14:43,310 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-12-05 21:14:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:14:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:14:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:14:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:14:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-12-05 21:14:43,310 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-12-05 21:14:43,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:14:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:14:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:14:43,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:14:43,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:14:43,312 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:14:43,484 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:14:43,486 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:14:43,837 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:14:43,865 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:14:43,866 INFO L309 CfgBuilder]: Removed 24 assume(true) statements. [2023-12-05 21:14:43,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:14:43 BoogieIcfgContainer [2023-12-05 21:14:43,867 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:14:43,869 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:14:43,869 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:14:43,871 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:14:43,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:14:42" (1/3) ... [2023-12-05 21:14:43,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0c9136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:14:43, skipping insertion in model container [2023-12-05 21:14:43,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:14:43" (2/3) ... [2023-12-05 21:14:43,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a0c9136 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:14:43, skipping insertion in model container [2023-12-05 21:14:43,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:14:43" (3/3) ... [2023-12-05 21:14:43,873 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_09-ptrmunge_racing.i [2023-12-05 21:14:43,885 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:14:43,885 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-05 21:14:43,885 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:14:43,986 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-12-05 21:14:44,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 271 transitions, 562 flow [2023-12-05 21:14:44,169 INFO L124 PetriNetUnfolderBase]: 61/491 cut-off events. [2023-12-05 21:14:44,170 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-12-05 21:14:44,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508 conditions, 491 events. 61/491 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 2510 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 269. Up to 8 conditions per place. [2023-12-05 21:14:44,185 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 271 transitions, 562 flow [2023-12-05 21:14:44,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 271 transitions, 562 flow [2023-12-05 21:14:44,200 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:14:44,206 INFO L362 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=true, 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;@27267603, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:14:44,206 INFO L363 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2023-12-05 21:14:44,211 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:14:44,211 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2023-12-05 21:14:44,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:14:44,211 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:44,212 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:44,212 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-12-05 21:14:44,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:44,216 INFO L85 PathProgramCache]: Analyzing trace with hash -742098485, now seen corresponding path program 1 times [2023-12-05 21:14:44,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902207578] [2023-12-05 21:14:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:44,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:44,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:44,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:44,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902207578] [2023-12-05 21:14:44,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902207578] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:44,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:14:44,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:14:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692021203] [2023-12-05 21:14:44,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:44,469 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:14:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:44,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:14:44,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:14:44,497 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 271 [2023-12-05 21:14:44,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 271 transitions, 562 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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) [2023-12-05 21:14:44,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:44,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 271 [2023-12-05 21:14:44,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:46,876 INFO L124 PetriNetUnfolderBase]: 7943/21126 cut-off events. [2023-12-05 21:14:46,876 INFO L125 PetriNetUnfolderBase]: For 258/258 co-relation queries the response was YES. [2023-12-05 21:14:46,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33558 conditions, 21126 events. 7943/21126 cut-off events. For 258/258 co-relation queries the response was YES. Maximal size of possible extension queue 1430. Compared 261170 event pairs, 4788 based on Foata normal form. 5265/22495 useless extension candidates. Maximal degree in co-relation 31971. Up to 7800 conditions per place. [2023-12-05 21:14:47,019 INFO L140 encePairwiseOnDemand]: 239/271 looper letters, 98 selfloop transitions, 2 changer transitions 0/271 dead transitions. [2023-12-05 21:14:47,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 271 transitions, 762 flow [2023-12-05 21:14:47,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:14:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:14:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 679 transitions. [2023-12-05 21:14:47,031 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8351783517835178 [2023-12-05 21:14:47,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 679 transitions. [2023-12-05 21:14:47,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 679 transitions. [2023-12-05 21:14:47,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:47,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 679 transitions. [2023-12-05 21:14:47,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.33333333333334) internal successors, (679), 3 states have internal predecessors, (679), 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) [2023-12-05 21:14:47,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 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) [2023-12-05 21:14:47,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 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) [2023-12-05 21:14:47,045 INFO L308 CegarLoopForPetriNet]: 242 programPoint places, -6 predicate places. [2023-12-05 21:14:47,045 INFO L500 AbstractCegarLoop]: Abstraction has has 236 places, 271 transitions, 762 flow [2023-12-05 21:14:47,045 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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) [2023-12-05 21:14:47,045 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:47,045 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:47,046 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:14:47,046 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-12-05 21:14:47,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:47,046 INFO L85 PathProgramCache]: Analyzing trace with hash -742098484, now seen corresponding path program 1 times [2023-12-05 21:14:47,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:47,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721269855] [2023-12-05 21:14:47,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:47,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:47,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:47,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:47,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:47,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721269855] [2023-12-05 21:14:47,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721269855] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:47,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:14:47,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:14:47,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643883282] [2023-12-05 21:14:47,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:47,166 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:14:47,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:47,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:14:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:14:47,167 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 271 [2023-12-05 21:14:47,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 271 transitions, 762 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2023-12-05 21:14:47,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:47,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 271 [2023-12-05 21:14:47,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:50,253 INFO L124 PetriNetUnfolderBase]: 13352/32379 cut-off events. [2023-12-05 21:14:50,254 INFO L125 PetriNetUnfolderBase]: For 7648/8246 co-relation queries the response was YES. [2023-12-05 21:14:50,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66952 conditions, 32379 events. 13352/32379 cut-off events. For 7648/8246 co-relation queries the response was YES. Maximal size of possible extension queue 2541. Compared 404868 event pairs, 8966 based on Foata normal form. 0/30536 useless extension candidates. Maximal degree in co-relation 64979. Up to 12896 conditions per place. [2023-12-05 21:14:50,678 INFO L140 encePairwiseOnDemand]: 265/271 looper letters, 146 selfloop transitions, 4 changer transitions 0/327 dead transitions. [2023-12-05 21:14:50,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 327 transitions, 1254 flow [2023-12-05 21:14:50,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:14:50,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:14:50,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 810 transitions. [2023-12-05 21:14:50,680 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7472324723247232 [2023-12-05 21:14:50,680 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 810 transitions. [2023-12-05 21:14:50,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 810 transitions. [2023-12-05 21:14:50,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:50,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 810 transitions. [2023-12-05 21:14:50,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 202.5) internal successors, (810), 4 states have internal predecessors, (810), 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) [2023-12-05 21:14:50,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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) [2023-12-05 21:14:50,685 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 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) [2023-12-05 21:14:50,686 INFO L308 CegarLoopForPetriNet]: 242 programPoint places, -3 predicate places. [2023-12-05 21:14:50,686 INFO L500 AbstractCegarLoop]: Abstraction has has 239 places, 327 transitions, 1254 flow [2023-12-05 21:14:50,686 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2023-12-05 21:14:50,686 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:50,686 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:50,687 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:14:50,687 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-12-05 21:14:50,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:50,687 INFO L85 PathProgramCache]: Analyzing trace with hash -626804415, now seen corresponding path program 1 times [2023-12-05 21:14:50,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:50,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617285353] [2023-12-05 21:14:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:50,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:50,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:50,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617285353] [2023-12-05 21:14:50,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617285353] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:14:50,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25786042] [2023-12-05 21:14:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:50,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:50,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:14:50,936 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) [2023-12-05 21:14:50,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:14:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:51,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-05 21:14:51,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:14:51,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:14:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:51,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:14:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:51,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25786042] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:14:51,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:14:51,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:14:51,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097801531] [2023-12-05 21:14:51,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:14:51,255 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-05 21:14:51,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:51,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-05 21:14:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:14:51,257 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 271 [2023-12-05 21:14:51,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 327 transitions, 1254 flow. Second operand has 11 states, 11 states have (on average 172.8181818181818) internal successors, (1901), 11 states have internal predecessors, (1901), 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) [2023-12-05 21:14:51,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:51,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 271 [2023-12-05 21:14:51,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:14:51,421 INFO L124 PetriNetUnfolderBase]: 97/399 cut-off events. [2023-12-05 21:14:51,422 INFO L125 PetriNetUnfolderBase]: For 272/336 co-relation queries the response was YES. [2023-12-05 21:14:51,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 399 events. 97/399 cut-off events. For 272/336 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1961 event pairs, 5 based on Foata normal form. 12/396 useless extension candidates. Maximal degree in co-relation 950. Up to 135 conditions per place. [2023-12-05 21:14:51,423 INFO L140 encePairwiseOnDemand]: 264/271 looper letters, 84 selfloop transitions, 5 changer transitions 0/170 dead transitions. [2023-12-05 21:14:51,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 170 transitions, 836 flow [2023-12-05 21:14:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:14:51,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:14:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1281 transitions. [2023-12-05 21:14:51,426 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6752767527675276 [2023-12-05 21:14:51,426 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1281 transitions. [2023-12-05 21:14:51,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1281 transitions. [2023-12-05 21:14:51,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:14:51,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1281 transitions. [2023-12-05 21:14:51,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 183.0) internal successors, (1281), 7 states have internal predecessors, (1281), 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) [2023-12-05 21:14:51,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 271.0) internal successors, (2168), 8 states have internal predecessors, (2168), 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) [2023-12-05 21:14:51,432 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 271.0) internal successors, (2168), 8 states have internal predecessors, (2168), 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) [2023-12-05 21:14:51,432 INFO L308 CegarLoopForPetriNet]: 242 programPoint places, -114 predicate places. [2023-12-05 21:14:51,433 INFO L500 AbstractCegarLoop]: Abstraction has has 128 places, 170 transitions, 836 flow [2023-12-05 21:14:51,434 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 172.8181818181818) internal successors, (1901), 11 states have internal predecessors, (1901), 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) [2023-12-05 21:14:51,434 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:51,434 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:51,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-05 21:14:51,639 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:14:51,639 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2023-12-05 21:14:51,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:51,639 INFO L85 PathProgramCache]: Analyzing trace with hash 2043900453, now seen corresponding path program 1 times [2023-12-05 21:14:51,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:51,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000761828] [2023-12-05 21:14:51,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:51,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:51,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:14:51,653 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:14:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:14:51,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:14:51,675 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:14:51,676 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2023-12-05 21:14:51,677 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2023-12-05 21:14:51,677 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2023-12-05 21:14:51,678 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2023-12-05 21:14:51,679 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2023-12-05 21:14:51,680 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2023-12-05 21:14:51,681 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2023-12-05 21:14:51,682 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2023-12-05 21:14:51,682 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2023-12-05 21:14:51,682 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2023-12-05 21:14:51,682 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2023-12-05 21:14:51,682 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2023-12-05 21:14:51,682 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2023-12-05 21:14:51,682 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 50 remaining) [2023-12-05 21:14:51,682 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:14:51,683 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-05 21:14:51,685 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:14:51,685 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:14:51,735 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-12-05 21:14:51,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 388 places, 443 transitions, 930 flow [2023-12-05 21:14:51,906 INFO L124 PetriNetUnfolderBase]: 205/1426 cut-off events. [2023-12-05 21:14:51,907 INFO L125 PetriNetUnfolderBase]: For 72/78 co-relation queries the response was YES. [2023-12-05 21:14:51,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1515 conditions, 1426 events. 205/1426 cut-off events. For 72/78 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9723 event pairs, 2 based on Foata normal form. 0/1066 useless extension candidates. Maximal degree in co-relation 873. Up to 32 conditions per place. [2023-12-05 21:14:51,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 388 places, 443 transitions, 930 flow [2023-12-05 21:14:51,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 388 places, 443 transitions, 930 flow [2023-12-05 21:14:51,964 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:14:51,965 INFO L362 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=true, 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;@27267603, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:14:51,965 INFO L363 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2023-12-05 21:14:51,967 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:14:51,967 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2023-12-05 21:14:51,967 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:14:51,968 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:14:51,968 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:14:51,968 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2023-12-05 21:14:51,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:14:51,968 INFO L85 PathProgramCache]: Analyzing trace with hash 986277924, now seen corresponding path program 1 times [2023-12-05 21:14:51,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:14:51,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273370091] [2023-12-05 21:14:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:14:51,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:14:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:14:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:14:51,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:14:51,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273370091] [2023-12-05 21:14:51,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273370091] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:14:51,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:14:51,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:14:51,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371962388] [2023-12-05 21:14:51,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:14:51,997 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:14:51,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:14:51,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:14:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:14:51,999 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 443 [2023-12-05 21:14:52,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 443 transitions, 930 flow. Second operand has 3 states, 3 states have (on average 282.3333333333333) internal successors, (847), 3 states have internal predecessors, (847), 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) [2023-12-05 21:14:52,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:14:52,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 443 [2023-12-05 21:14:52,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand