/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -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_04-munge_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 05:08:19,797 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 05:08:19,866 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 [2023-11-30 05:08:19,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 05:08:19,893 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 05:08:19,894 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 05:08:19,894 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 05:08:19,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 05:08:19,894 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 05:08:19,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 05:08:19,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 05:08:19,898 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 05:08:19,898 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 05:08:19,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 05:08:19,899 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 05:08:19,899 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 05:08:19,900 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 05:08:19,900 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 05:08:19,900 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 05:08:19,900 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 05:08:19,900 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 05:08:19,901 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 05:08:19,901 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 05:08:19,901 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 05:08:19,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 05:08:19,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:08:19,902 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 05:08:19,902 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 05:08:19,902 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 05:08:19,902 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 05:08:19,903 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 05:08:19,903 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 05:08:19,903 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 05:08:19,903 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 05:08:20,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 05:08:20,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 05:08:20,111 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 05:08:20,112 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 05:08:20,112 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 05:08:20,113 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i [2023-11-30 05:08:21,178 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 05:08:21,427 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 05:08:21,428 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_04-munge_racefree.i [2023-11-30 05:08:21,441 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc40d3ac/3acbbcd896664a5bb5c81a4d42c70e7f/FLAG1ae1d96f7 [2023-11-30 05:08:21,453 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dc40d3ac/3acbbcd896664a5bb5c81a4d42c70e7f [2023-11-30 05:08:21,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 05:08:21,456 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 05:08:21,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 05:08:21,457 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 05:08:21,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 05:08:21,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1554a0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21, skipping insertion in model container [2023-11-30 05:08:21,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,487 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 05:08:21,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:08:21,704 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 05:08:21,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:08:21,796 INFO L206 MainTranslator]: Completed translation [2023-11-30 05:08:21,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21 WrapperNode [2023-11-30 05:08:21,796 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 05:08:21,797 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 05:08:21,797 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 05:08:21,797 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 05:08:21,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,812 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,838 INFO L138 Inliner]: procedures = 173, calls = 42, calls flagged for inlining = 6, calls inlined = 8, statements flattened = 235 [2023-11-30 05:08:21,839 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 05:08:21,839 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 05:08:21,839 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 05:08:21,839 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 05:08:21,849 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,849 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,857 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,857 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,870 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,873 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,874 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,875 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,877 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 05:08:21,878 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 05:08:21,878 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 05:08:21,878 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 05:08:21,879 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (1/1) ... [2023-11-30 05:08:21,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:08:21,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:08:21,903 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) [2023-11-30 05:08:21,912 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 [2023-11-30 05:08:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 05:08:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-11-30 05:08:21,931 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-11-30 05:08:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 05:08:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-30 05:08:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 05:08:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 05:08:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2023-11-30 05:08:21,932 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2023-11-30 05:08:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 05:08:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 05:08:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-30 05:08:21,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 05:08:21,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 05:08:21,935 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-30 05:08:22,034 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 05:08:22,036 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 05:08:22,279 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 05:08:22,305 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 05:08:22,305 INFO L309 CfgBuilder]: Removed 24 assume(true) statements. [2023-11-30 05:08:22,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:08:22 BoogieIcfgContainer [2023-11-30 05:08:22,306 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 05:08:22,308 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 05:08:22,308 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 05:08:22,310 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 05:08:22,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 05:08:21" (1/3) ... [2023-11-30 05:08:22,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659d33a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:08:22, skipping insertion in model container [2023-11-30 05:08:22,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:08:21" (2/3) ... [2023-11-30 05:08:22,311 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659d33a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:08:22, skipping insertion in model container [2023-11-30 05:08:22,311 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:08:22" (3/3) ... [2023-11-30 05:08:22,311 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_04-munge_racefree.i [2023-11-30 05:08:22,323 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 05:08:22,323 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-30 05:08:22,323 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 05:08:22,390 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-30 05:08:22,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 237 transitions, 494 flow [2023-11-30 05:08:22,522 INFO L124 PetriNetUnfolderBase]: 61/440 cut-off events. [2023-11-30 05:08:22,523 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-30 05:08:22,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457 conditions, 440 events. 61/440 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2058 event pairs, 0 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 235. Up to 8 conditions per place. [2023-11-30 05:08:22,535 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 237 transitions, 494 flow [2023-11-30 05:08:22,541 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 237 transitions, 494 flow [2023-11-30 05:08:22,547 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:08:22,552 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;@1215d60a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:08:22,552 INFO L363 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-30 05:08:22,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:08:22,563 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2023-11-30 05:08:22,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:08:22,564 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:08:22,564 INFO L232 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] [2023-11-30 05:08:22,565 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-30 05:08:22,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:08:22,570 INFO L85 PathProgramCache]: Analyzing trace with hash -326650073, now seen corresponding path program 1 times [2023-11-30 05:08:22,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:08:22,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294743245] [2023-11-30 05:08:22,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:08:22,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:08:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:08:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:08:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:08:22,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294743245] [2023-11-30 05:08:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294743245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:08:22,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:08:22,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:08:22,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426642192] [2023-11-30 05:08:22,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:08:22,854 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:08:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:08:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:08:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:08:22,880 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 237 [2023-11-30 05:08:22,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 237 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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) [2023-11-30 05:08:22,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:08:22,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 237 [2023-11-30 05:08:22,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:08:23,850 INFO L124 PetriNetUnfolderBase]: 1873/7009 cut-off events. [2023-11-30 05:08:23,851 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-11-30 05:08:23,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10019 conditions, 7009 events. 1873/7009 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 78882 event pairs, 1088 based on Foata normal form. 2339/8764 useless extension candidates. Maximal degree in co-relation 9039. Up to 1890 conditions per place. [2023-11-30 05:08:23,894 INFO L140 encePairwiseOnDemand]: 205/237 looper letters, 56 selfloop transitions, 2 changer transitions 0/217 dead transitions. [2023-11-30 05:08:23,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 217 transitions, 570 flow [2023-11-30 05:08:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:08:23,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:08:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-11-30 05:08:23,909 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8452883263009845 [2023-11-30 05:08:23,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-11-30 05:08:23,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-11-30 05:08:23,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:08:23,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-11-30 05:08:23,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 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) [2023-11-30 05:08:23,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 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) [2023-11-30 05:08:23,926 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 237.0) internal successors, (948), 4 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) [2023-11-30 05:08:23,930 INFO L307 CegarLoopForPetriNet]: 208 programPoint places, -6 predicate places. [2023-11-30 05:08:23,930 INFO L500 AbstractCegarLoop]: Abstraction has has 202 places, 217 transitions, 570 flow [2023-11-30 05:08:23,931 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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) [2023-11-30 05:08:23,931 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:08:23,931 INFO L232 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] [2023-11-30 05:08:23,931 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 05:08:23,931 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-30 05:08:23,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:08:23,933 INFO L85 PathProgramCache]: Analyzing trace with hash -326650072, now seen corresponding path program 1 times [2023-11-30 05:08:23,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:08:23,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926647972] [2023-11-30 05:08:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:08:23,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:08:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:08:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:08:24,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:08:24,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926647972] [2023-11-30 05:08:24,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926647972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:08:24,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:08:24,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:08:24,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220188389] [2023-11-30 05:08:24,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:08:24,127 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:08:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:08:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:08:24,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:08:24,130 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 237 [2023-11-30 05:08:24,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 217 transitions, 570 flow. Second operand has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 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) [2023-11-30 05:08:24,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:08:24,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 237 [2023-11-30 05:08:24,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:08:25,003 INFO L124 PetriNetUnfolderBase]: 2176/7598 cut-off events. [2023-11-30 05:08:25,004 INFO L125 PetriNetUnfolderBase]: For 1343/1545 co-relation queries the response was YES. [2023-11-30 05:08:25,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14027 conditions, 7598 events. 2176/7598 cut-off events. For 1343/1545 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 85402 event pairs, 640 based on Foata normal form. 0/7111 useless extension candidates. Maximal degree in co-relation 13170. Up to 2441 conditions per place. [2023-11-30 05:08:25,043 INFO L140 encePairwiseOnDemand]: 231/237 looper letters, 84 selfloop transitions, 4 changer transitions 0/243 dead transitions. [2023-11-30 05:08:25,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 243 transitions, 848 flow [2023-11-30 05:08:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-30 05:08:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-30 05:08:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2023-11-30 05:08:25,046 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7489451476793249 [2023-11-30 05:08:25,046 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2023-11-30 05:08:25,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2023-11-30 05:08:25,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:08:25,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2023-11-30 05:08:25,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 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) [2023-11-30 05:08:25,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 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) [2023-11-30 05:08:25,050 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 237.0) internal successors, (1185), 5 states have internal predecessors, (1185), 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) [2023-11-30 05:08:25,051 INFO L307 CegarLoopForPetriNet]: 208 programPoint places, -3 predicate places. [2023-11-30 05:08:25,051 INFO L500 AbstractCegarLoop]: Abstraction has has 205 places, 243 transitions, 848 flow [2023-11-30 05:08:25,052 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 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) [2023-11-30 05:08:25,052 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:08:25,052 INFO L232 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] [2023-11-30 05:08:25,052 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 05:08:25,052 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-30 05:08:25,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:08:25,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1817105187, now seen corresponding path program 1 times [2023-11-30 05:08:25,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:08:25,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296854671] [2023-11-30 05:08:25,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:08:25,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:08:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:08:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:08:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:08:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296854671] [2023-11-30 05:08:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296854671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:08:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239182191] [2023-11-30 05:08:25,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:08:25,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:08:25,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:08:25,178 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) [2023-11-30 05:08:25,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-30 05:08:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:08:25,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-30 05:08:25,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:08:25,314 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 [2023-11-30 05:08:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:08:25,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:08:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:08:25,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239182191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:08:25,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:08:25,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-11-30 05:08:25,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814383566] [2023-11-30 05:08:25,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:08:25,491 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-30 05:08:25,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:08:25,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-30 05:08:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-30 05:08:25,493 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 237 [2023-11-30 05:08:25,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 243 transitions, 848 flow. Second operand has 14 states, 14 states have (on average 160.5) internal successors, (2247), 14 states have internal predecessors, (2247), 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) [2023-11-30 05:08:25,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:08:25,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 237 [2023-11-30 05:08:25,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:08:25,611 INFO L124 PetriNetUnfolderBase]: 42/280 cut-off events. [2023-11-30 05:08:25,611 INFO L125 PetriNetUnfolderBase]: For 165/229 co-relation queries the response was YES. [2023-11-30 05:08:25,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 280 events. 42/280 cut-off events. For 165/229 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1225 event pairs, 6 based on Foata normal form. 18/284 useless extension candidates. Maximal degree in co-relation 545. Up to 60 conditions per place. [2023-11-30 05:08:25,612 INFO L140 encePairwiseOnDemand]: 230/237 looper letters, 42 selfloop transitions, 5 changer transitions 0/123 dead transitions. [2023-11-30 05:08:25,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 123 transitions, 520 flow [2023-11-30 05:08:25,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-30 05:08:25,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-30 05:08:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1155 transitions. [2023-11-30 05:08:25,615 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.6962025316455697 [2023-11-30 05:08:25,615 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1155 transitions. [2023-11-30 05:08:25,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1155 transitions. [2023-11-30 05:08:25,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:08:25,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1155 transitions. [2023-11-30 05:08:25,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 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) [2023-11-30 05:08:25,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 237.0) internal successors, (1896), 8 states have internal predecessors, (1896), 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) [2023-11-30 05:08:25,620 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 237.0) internal successors, (1896), 8 states have internal predecessors, (1896), 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) [2023-11-30 05:08:25,620 INFO L307 CegarLoopForPetriNet]: 208 programPoint places, -97 predicate places. [2023-11-30 05:08:25,621 INFO L500 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 520 flow [2023-11-30 05:08:25,622 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 160.5) internal successors, (2247), 14 states have internal predecessors, (2247), 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) [2023-11-30 05:08:25,622 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:08:25,622 INFO L232 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] [2023-11-30 05:08:25,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-30 05:08:25,828 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 [2023-11-30 05:08:25,828 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-30 05:08:25,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:08:25,829 INFO L85 PathProgramCache]: Analyzing trace with hash -495685213, now seen corresponding path program 1 times [2023-11-30 05:08:25,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:08:25,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606089904] [2023-11-30 05:08:25,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:08:25,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:08:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:08:25,899 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-30 05:08:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-30 05:08:25,950 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-30 05:08:25,950 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-30 05:08:25,951 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-30 05:08:25,952 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-30 05:08:25,952 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-30 05:08:25,952 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-11-30 05:08:25,952 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-30 05:08:25,953 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-30 05:08:25,953 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2023-11-30 05:08:25,953 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-11-30 05:08:25,953 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-11-30 05:08:25,953 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-11-30 05:08:25,953 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-30 05:08:25,954 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-30 05:08:25,955 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-30 05:08:25,955 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-30 05:08:25,993 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-30 05:08:25,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 375 transitions, 794 flow [2023-11-30 05:08:26,185 INFO L124 PetriNetUnfolderBase]: 205/1290 cut-off events. [2023-11-30 05:08:26,186 INFO L125 PetriNetUnfolderBase]: For 72/75 co-relation queries the response was YES. [2023-11-30 05:08:26,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1379 conditions, 1290 events. 205/1290 cut-off events. For 72/75 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 8290 event pairs, 1 based on Foata normal form. 0/1010 useless extension candidates. Maximal degree in co-relation 780. Up to 32 conditions per place. [2023-11-30 05:08:26,213 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 375 transitions, 794 flow [2023-11-30 05:08:26,229 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 375 transitions, 794 flow [2023-11-30 05:08:26,236 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:08:26,237 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;@1215d60a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:08:26,238 INFO L363 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-30 05:08:26,242 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:08:26,242 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2023-11-30 05:08:26,242 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:08:26,242 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:08:26,242 INFO L232 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] [2023-11-30 05:08:26,242 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-30 05:08:26,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:08:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1338526020, now seen corresponding path program 1 times [2023-11-30 05:08:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:08:26,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368883487] [2023-11-30 05:08:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:08:26,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:08:26,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:08:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:08:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:08:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368883487] [2023-11-30 05:08:26,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368883487] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:08:26,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:08:26,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-30 05:08:26,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084616558] [2023-11-30 05:08:26,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:08:26,296 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-30 05:08:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:08:26,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-30 05:08:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-30 05:08:26,297 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 375 [2023-11-30 05:08:26,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 375 transitions, 794 flow. Second operand has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 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) [2023-11-30 05:08:26,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:08:26,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 375 [2023-11-30 05:08:26,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:10:21,518 INFO L124 PetriNetUnfolderBase]: 365066/831394 cut-off events. [2023-11-30 05:10:21,518 INFO L125 PetriNetUnfolderBase]: For 24396/24396 co-relation queries the response was YES. [2023-11-30 05:10:30,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1309022 conditions, 831394 events. 365066/831394 cut-off events. For 24396/24396 co-relation queries the response was YES. Maximal size of possible extension queue 25833. Compared 13271842 event pairs, 221513 based on Foata normal form. 428197/1204331 useless extension candidates. Maximal degree in co-relation 186895. Up to 298068 conditions per place. [2023-11-30 05:10:35,563 INFO L140 encePairwiseOnDemand]: 319/375 looper letters, 94 selfloop transitions, 2 changer transitions 0/341 dead transitions. [2023-11-30 05:10:35,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 341 transitions, 918 flow [2023-11-30 05:10:35,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-30 05:10:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-30 05:10:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 957 transitions. [2023-11-30 05:10:35,580 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8506666666666667 [2023-11-30 05:10:35,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 957 transitions. [2023-11-30 05:10:35,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 957 transitions. [2023-11-30 05:10:35,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:10:35,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 957 transitions. [2023-11-30 05:10:35,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 319.0) internal successors, (957), 3 states have internal predecessors, (957), 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) [2023-11-30 05:10:35,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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) [2023-11-30 05:10:35,588 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 375.0) internal successors, (1500), 4 states have internal predecessors, (1500), 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) [2023-11-30 05:10:35,588 INFO L307 CegarLoopForPetriNet]: 320 programPoint places, -12 predicate places. [2023-11-30 05:10:35,588 INFO L500 AbstractCegarLoop]: Abstraction has has 308 places, 341 transitions, 918 flow [2023-11-30 05:10:35,593 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 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) [2023-11-30 05:10:35,595 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:10:35,595 INFO L232 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] [2023-11-30 05:10:35,595 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-30 05:10:35,595 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-11-30 05:10:35,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:10:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1338526019, now seen corresponding path program 1 times [2023-11-30 05:10:35,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:10:35,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622774306] [2023-11-30 05:10:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:10:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:10:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:10:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:10:35,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:10:35,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622774306] [2023-11-30 05:10:35,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622774306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:10:35,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:10:35,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:10:35,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211934760] [2023-11-30 05:10:35,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:10:35,706 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:10:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:10:35,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:10:35,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:10:35,708 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 375 [2023-11-30 05:10:35,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 341 transitions, 918 flow. Second operand has 4 states, 4 states have (on average 251.25) internal successors, (1005), 4 states have internal predecessors, (1005), 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) [2023-11-30 05:10:35,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:10:35,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 375 [2023-11-30 05:10:35,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand