/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:40:55,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:40:55,775 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:40:55,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:40:55,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:40:55,796 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:40:55,797 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:40:55,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:40:55,797 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:40:55,797 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:40:55,798 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:40:55,798 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:40:55,798 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:40:55,798 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:40:55,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:40:55,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:40:55,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:40:55,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:40:55,799 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:40:55,800 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:40:55,800 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:40:55,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:40:55,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:40:55,801 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:40:55,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:40:55,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:55,801 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:40:55,801 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:40:55,801 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:40:55,802 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:40:55,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:40:55,802 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:40:55,802 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:40:55,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:40:55,998 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:40:56,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:40:56,001 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:40:56,003 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:40:56,004 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-11-17 11:40:56,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:40:57,198 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:40:57,199 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2023-11-17 11:40:57,216 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/212200dec/ab143892149b4917bea09084829ec58e/FLAG9ae0862ca [2023-11-17 11:40:57,229 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/212200dec/ab143892149b4917bea09084829ec58e [2023-11-17 11:40:57,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:40:57,232 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:40:57,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:57,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:40:57,238 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:40:57,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,239 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c76f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57, skipping insertion in model container [2023-11-17 11:40:57,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,275 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:40:57,576 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-11-17 11:40:57,605 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:57,621 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:40:57,657 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_72-funloop_hard_racing.i[41323,41336] [2023-11-17 11:40:57,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:40:57,723 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:40:57,725 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57 WrapperNode [2023-11-17 11:40:57,725 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:40:57,726 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:57,726 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:40:57,727 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:40:57,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,744 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,763 INFO L138 Inliner]: procedures = 272, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 288 [2023-11-17 11:40:57,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:40:57,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:40:57,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:40:57,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:40:57,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,781 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,781 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,799 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,804 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:40:57,809 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:40:57,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:40:57,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:40:57,810 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (1/1) ... [2023-11-17 11:40:57,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:40:57,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:40:57,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:40:57,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:40:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:40:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:40:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 11:40:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:40:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:40:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 11:40:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:40:57,860 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 11:40:57,860 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 11:40:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:40:57,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:40:57,861 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:40:57,862 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:40:57,959 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:40:57,961 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:40:58,249 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:40:58,395 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:40:58,395 INFO L307 CfgBuilder]: Removed 35 assume(true) statements. [2023-11-17 11:40:58,396 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:58 BoogieIcfgContainer [2023-11-17 11:40:58,396 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:40:58,399 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:40:58,399 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:40:58,402 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:40:58,402 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:40:57" (1/3) ... [2023-11-17 11:40:58,402 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8ef89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:58, skipping insertion in model container [2023-11-17 11:40:58,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:40:57" (2/3) ... [2023-11-17 11:40:58,403 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c8ef89d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:40:58, skipping insertion in model container [2023-11-17 11:40:58,403 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:40:58" (3/3) ... [2023-11-17 11:40:58,405 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2023-11-17 11:40:58,417 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:40:58,417 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-11-17 11:40:58,417 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:40:58,463 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 11:40:58,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 137 transitions, 281 flow [2023-11-17 11:40:58,563 INFO L124 PetriNetUnfolderBase]: 65/223 cut-off events. [2023-11-17 11:40:58,563 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:40:58,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 223 events. 65/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1055 event pairs, 0 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2023-11-17 11:40:58,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 137 transitions, 281 flow [2023-11-17 11:40:58,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 135 transitions, 274 flow [2023-11-17 11:40:58,581 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:40:58,593 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 135 transitions, 274 flow [2023-11-17 11:40:58,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 135 transitions, 274 flow [2023-11-17 11:40:58,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 135 transitions, 274 flow [2023-11-17 11:40:58,632 INFO L124 PetriNetUnfolderBase]: 64/221 cut-off events. [2023-11-17 11:40:58,632 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:58,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 221 events. 64/221 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1038 event pairs, 0 based on Foata normal form. 0/148 useless extension candidates. Maximal degree in co-relation 130. Up to 8 conditions per place. [2023-11-17 11:40:58,639 INFO L119 LiptonReduction]: Number of co-enabled transitions 7568 [2023-11-17 11:40:59,861 INFO L134 LiptonReduction]: Checked pairs total: 15363 [2023-11-17 11:40:59,861 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-11-17 11:40:59,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:40:59,884 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@780aaf8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:40:59,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 11:40:59,888 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:40:59,889 INFO L124 PetriNetUnfolderBase]: 15/43 cut-off events. [2023-11-17 11:40:59,889 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:40:59,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:40:59,889 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-17 11:40:59,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:40:59,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:40:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash -344108142, now seen corresponding path program 1 times [2023-11-17 11:40:59,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:40:59,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588853854] [2023-11-17 11:40:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:40:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:40:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:41:00,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:00,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588853854] [2023-11-17 11:41:00,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588853854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:00,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:00,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:00,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305136469] [2023-11-17 11:41:00,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:00,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:00,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:00,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:00,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:00,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 224 [2023-11-17 11:41:00,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 96 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:00,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 224 [2023-11-17 11:41:00,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:00,307 INFO L124 PetriNetUnfolderBase]: 647/1281 cut-off events. [2023-11-17 11:41:00,307 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:41:00,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2480 conditions, 1281 events. 647/1281 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6868 event pairs, 528 based on Foata normal form. 140/1202 useless extension candidates. Maximal degree in co-relation 2394. Up to 1194 conditions per place. [2023-11-17 11:41:00,314 INFO L140 encePairwiseOnDemand]: 187/224 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-11-17 11:41:00,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 242 flow [2023-11-17 11:41:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:41:00,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:41:00,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-11-17 11:41:00,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31398809523809523 [2023-11-17 11:41:00,324 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-11-17 11:41:00,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-11-17 11:41:00,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:00,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-11-17 11:41:00,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,337 INFO L175 Difference]: Start difference. First operand has 60 places, 96 transitions, 196 flow. Second operand 3 states and 211 transitions. [2023-11-17 11:41:00,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 242 flow [2023-11-17 11:41:00,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 242 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:00,342 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 140 flow [2023-11-17 11:41:00,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-11-17 11:41:00,347 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2023-11-17 11:41:00,347 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 140 flow [2023-11-17 11:41:00,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:00,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:00,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:41:00,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:41:00,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:00,354 INFO L85 PathProgramCache]: Analyzing trace with hash -166269806, now seen corresponding path program 1 times [2023-11-17 11:41:00,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:00,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180568123] [2023-11-17 11:41:00,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:00,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:41:00,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:00,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180568123] [2023-11-17 11:41:00,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180568123] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:00,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446883959] [2023-11-17 11:41:00,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:00,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:00,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:00,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:00,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 11:41:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:00,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:41:00,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:41:00,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:41:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:41:00,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446883959] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:41:00,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:41:00,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:41:00,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966190312] [2023-11-17 11:41:00,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:41:00,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:41:00,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:41:00,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:41:00,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 224 [2023-11-17 11:41:00,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 140 flow. Second operand has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:00,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 224 [2023-11-17 11:41:00,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:00,744 INFO L124 PetriNetUnfolderBase]: 647/1284 cut-off events. [2023-11-17 11:41:00,745 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 11:41:00,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1284 events. 647/1284 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6858 event pairs, 528 based on Foata normal form. 0/1065 useless extension candidates. Maximal degree in co-relation 2484. Up to 1194 conditions per place. [2023-11-17 11:41:00,749 INFO L140 encePairwiseOnDemand]: 221/224 looper letters, 54 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2023-11-17 11:41:00,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 270 flow [2023-11-17 11:41:00,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:41:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:41:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 302 transitions. [2023-11-17 11:41:00,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22470238095238096 [2023-11-17 11:41:00,754 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 302 transitions. [2023-11-17 11:41:00,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 302 transitions. [2023-11-17 11:41:00,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:00,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 302 transitions. [2023-11-17 11:41:00,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 50.333333333333336) internal successors, (302), 6 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,759 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,759 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 140 flow. Second operand 6 states and 302 transitions. [2023-11-17 11:41:00,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 270 flow [2023-11-17 11:41:00,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 266 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:00,763 INFO L231 Difference]: Finished difference. Result has 69 places, 66 transitions, 172 flow [2023-11-17 11:41:00,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=69, PETRI_TRANSITIONS=66} [2023-11-17 11:41:00,766 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 9 predicate places. [2023-11-17 11:41:00,771 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 66 transitions, 172 flow [2023-11-17 11:41:00,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 41.57142857142857) internal successors, (291), 7 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:00,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:00,772 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-11-17 11:41:00,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:41:00,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:00,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:41:00,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1852075118, now seen corresponding path program 2 times [2023-11-17 11:41:00,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:00,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123377707] [2023-11-17 11:41:00,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:41:01,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123377707] [2023-11-17 11:41:01,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123377707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:01,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755184478] [2023-11-17 11:41:01,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:41:01,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:01,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:01,215 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:01,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 11:41:01,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:41:01,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:41:01,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 11:41:01,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:41:01,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:41:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:41:01,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755184478] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:41:01,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:41:01,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 11:41:01,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849910023] [2023-11-17 11:41:01,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:41:01,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:41:01,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:01,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:41:01,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:41:01,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 224 [2023-11-17 11:41:01,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 66 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:01,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:01,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 224 [2023-11-17 11:41:01,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:01,567 INFO L124 PetriNetUnfolderBase]: 647/1290 cut-off events. [2023-11-17 11:41:01,567 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-11-17 11:41:01,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 1290 events. 647/1290 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 6864 event pairs, 528 based on Foata normal form. 6/1078 useless extension candidates. Maximal degree in co-relation 2475. Up to 1194 conditions per place. [2023-11-17 11:41:01,572 INFO L140 encePairwiseOnDemand]: 221/224 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2023-11-17 11:41:01,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 338 flow [2023-11-17 11:41:01,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:41:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:41:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 551 transitions. [2023-11-17 11:41:01,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.20498511904761904 [2023-11-17 11:41:01,574 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 551 transitions. [2023-11-17 11:41:01,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 551 transitions. [2023-11-17 11:41:01,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:01,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 551 transitions. [2023-11-17 11:41:01,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 45.916666666666664) internal successors, (551), 12 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:01,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:01,579 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:01,579 INFO L175 Difference]: Start difference. First operand has 69 places, 66 transitions, 172 flow. Second operand 12 states and 551 transitions. [2023-11-17 11:41:01,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 338 flow [2023-11-17 11:41:01,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 324 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:01,582 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 242 flow [2023-11-17 11:41:01,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=242, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-11-17 11:41:01,583 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, 25 predicate places. [2023-11-17 11:41:01,584 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 242 flow [2023-11-17 11:41:01,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:01,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:01,585 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-11-17 11:41:01,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:41:01,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-17 11:41:01,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 11:41:01,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:01,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2091709330, now seen corresponding path program 3 times [2023-11-17 11:41:01,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:01,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023374614] [2023-11-17 11:41:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:01,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:01,833 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:41:01,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:01,856 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:41:01,857 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:41:01,857 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 11:41:01,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 11:41:01,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 11:41:01,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 11:41:01,859 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 11:41:01,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:41:01,859 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-11-17 11:41:01,860 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:41:01,860 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 11:41:01,878 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 11:41:01,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 182 transitions, 380 flow [2023-11-17 11:41:01,900 INFO L124 PetriNetUnfolderBase]: 105/361 cut-off events. [2023-11-17 11:41:01,900 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:41:01,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 361 events. 105/361 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1941 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 225. Up to 12 conditions per place. [2023-11-17 11:41:01,902 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 182 transitions, 380 flow [2023-11-17 11:41:01,904 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 182 transitions, 380 flow [2023-11-17 11:41:01,904 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:01,905 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 182 transitions, 380 flow [2023-11-17 11:41:01,905 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 182 transitions, 380 flow [2023-11-17 11:41:01,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 182 transitions, 380 flow [2023-11-17 11:41:01,922 INFO L124 PetriNetUnfolderBase]: 105/361 cut-off events. [2023-11-17 11:41:01,922 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 11:41:01,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 361 events. 105/361 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1941 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 225. Up to 12 conditions per place. [2023-11-17 11:41:01,932 INFO L119 LiptonReduction]: Number of co-enabled transitions 19264 [2023-11-17 11:41:03,409 INFO L134 LiptonReduction]: Checked pairs total: 50180 [2023-11-17 11:41:03,409 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-11-17 11:41:03,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:03,418 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@780aaf8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:03,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 11:41:03,421 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:03,422 INFO L124 PetriNetUnfolderBase]: 20/56 cut-off events. [2023-11-17 11:41:03,422 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:41:03,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:03,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:03,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:41:03,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:03,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1544239737, now seen corresponding path program 1 times [2023-11-17 11:41:03,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:03,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086644700] [2023-11-17 11:41:03,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:03,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:03,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:03,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:03,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086644700] [2023-11-17 11:41:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086644700] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:03,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:03,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:03,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736458146] [2023-11-17 11:41:03,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:03,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:03,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:03,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:03,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:03,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 303 [2023-11-17 11:41:03,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 127 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:03,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:03,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 303 [2023-11-17 11:41:03,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:05,277 INFO L124 PetriNetUnfolderBase]: 19957/29900 cut-off events. [2023-11-17 11:41:05,277 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-17 11:41:05,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58222 conditions, 29900 events. 19957/29900 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 193908 event pairs, 17145 based on Foata normal form. 3412/27796 useless extension candidates. Maximal degree in co-relation 45099. Up to 28234 conditions per place. [2023-11-17 11:41:05,437 INFO L140 encePairwiseOnDemand]: 257/303 looper letters, 74 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-11-17 11:41:05,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 85 transitions, 338 flow [2023-11-17 11:41:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:41:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:41:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 279 transitions. [2023-11-17 11:41:05,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3069306930693069 [2023-11-17 11:41:05,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 279 transitions. [2023-11-17 11:41:05,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 279 transitions. [2023-11-17 11:41:05,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:05,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 279 transitions. [2023-11-17 11:41:05,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,441 INFO L175 Difference]: Start difference. First operand has 79 places, 127 transitions, 270 flow. Second operand 3 states and 279 transitions. [2023-11-17 11:41:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 85 transitions, 338 flow [2023-11-17 11:41:05,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 85 transitions, 338 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:05,444 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 196 flow [2023-11-17 11:41:05,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2023-11-17 11:41:05,445 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2023-11-17 11:41:05,445 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 196 flow [2023-11-17 11:41:05,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:05,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:05,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:41:05,445 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:41:05,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1908344372, now seen corresponding path program 1 times [2023-11-17 11:41:05,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:05,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272984098] [2023-11-17 11:41:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:05,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:05,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:05,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:05,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272984098] [2023-11-17 11:41:05,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272984098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:05,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20136866] [2023-11-17 11:41:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:05,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:05,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:05,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 11:41:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:05,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-17 11:41:05,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:05,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:41:05,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:41:05,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20136866] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:05,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:41:05,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-17 11:41:05,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130059388] [2023-11-17 11:41:05,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:05,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:05,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:41:05,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 303 [2023-11-17 11:41:05,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:05,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:05,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 303 [2023-11-17 11:41:05,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:07,174 INFO L124 PetriNetUnfolderBase]: 19637/29598 cut-off events. [2023-11-17 11:41:07,174 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-11-17 11:41:07,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57896 conditions, 29598 events. 19637/29598 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 196599 event pairs, 8220 based on Foata normal form. 0/24068 useless extension candidates. Maximal degree in co-relation 57883. Up to 28185 conditions per place. [2023-11-17 11:41:07,336 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 92 selfloop transitions, 2 changer transitions 0/103 dead transitions. [2023-11-17 11:41:07,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 103 transitions, 420 flow [2023-11-17 11:41:07,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:41:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:41:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2023-11-17 11:41:07,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27832783278327833 [2023-11-17 11:41:07,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2023-11-17 11:41:07,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2023-11-17 11:41:07,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:07,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2023-11-17 11:41:07,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:07,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:07,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 303.0) internal successors, (1212), 4 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:07,340 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 196 flow. Second operand 3 states and 253 transitions. [2023-11-17 11:41:07,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 103 transitions, 420 flow [2023-11-17 11:41:07,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 103 transitions, 416 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:07,342 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 204 flow [2023-11-17 11:41:07,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-11-17 11:41:07,343 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 5 predicate places. [2023-11-17 11:41:07,343 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 204 flow [2023-11-17 11:41:07,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:07,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:07,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:07,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 11:41:07,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:07,548 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:41:07,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash 745239843, now seen corresponding path program 1 times [2023-11-17 11:41:07,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:07,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655992460] [2023-11-17 11:41:07,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:07,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:07,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655992460] [2023-11-17 11:41:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655992460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495789176] [2023-11-17 11:41:07,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:07,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:07,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:07,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 11:41:07,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:07,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 11:41:07,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:07,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:07,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:41:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:07,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495789176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:41:07,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:41:07,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 11:41:07,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851185662] [2023-11-17 11:41:07,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:41:07,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 11:41:07,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:07,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 11:41:07,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 11:41:07,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 303 [2023-11-17 11:41:07,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 204 flow. Second operand has 7 states, 7 states have (on average 55.142857142857146) internal successors, (386), 7 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:07,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:07,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 303 [2023-11-17 11:41:07,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:09,309 INFO L124 PetriNetUnfolderBase]: 20041/29859 cut-off events. [2023-11-17 11:41:09,309 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2023-11-17 11:41:09,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58723 conditions, 29859 events. 20041/29859 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 192222 event pairs, 17145 based on Foata normal form. 3/24617 useless extension candidates. Maximal degree in co-relation 58695. Up to 28203 conditions per place. [2023-11-17 11:41:09,452 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 75 selfloop transitions, 5 changer transitions 0/89 dead transitions. [2023-11-17 11:41:09,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 376 flow [2023-11-17 11:41:09,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:41:09,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:41:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 400 transitions. [2023-11-17 11:41:09,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.22002200220022003 [2023-11-17 11:41:09,455 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 400 transitions. [2023-11-17 11:41:09,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 400 transitions. [2023-11-17 11:41:09,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:09,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 400 transitions. [2023-11-17 11:41:09,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.66666666666667) internal successors, (400), 6 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:09,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:09,457 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:09,458 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 204 flow. Second operand 6 states and 400 transitions. [2023-11-17 11:41:09,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 376 flow [2023-11-17 11:41:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:09,460 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 238 flow [2023-11-17 11:41:09,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-11-17 11:41:09,460 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2023-11-17 11:41:09,461 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 238 flow [2023-11-17 11:41:09,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.142857142857146) internal successors, (386), 7 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:09,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:09,461 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:09,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 11:41:09,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:09,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:41:09,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:09,673 INFO L85 PathProgramCache]: Analyzing trace with hash 587909968, now seen corresponding path program 2 times [2023-11-17 11:41:09,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:09,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119155234] [2023-11-17 11:41:09,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:09,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:09,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:09,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119155234] [2023-11-17 11:41:09,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119155234] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:09,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365742343] [2023-11-17 11:41:09,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:41:09,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:09,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:09,746 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:09,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 11:41:09,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 11:41:09,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:41:09,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 11:41:09,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:09,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2023-11-17 11:41:09,891 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 11:41:09,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-17 11:41:09,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 10 [2023-11-17 11:41:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 11:41:09,952 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:41:09,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365742343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:09,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:41:09,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-17 11:41:09,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776515565] [2023-11-17 11:41:09,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:09,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 11:41:09,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:09,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 11:41:09,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-17 11:41:09,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 303 [2023-11-17 11:41:09,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 238 flow. Second operand has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:09,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:09,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 303 [2023-11-17 11:41:09,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:12,348 INFO L124 PetriNetUnfolderBase]: 25061/38211 cut-off events. [2023-11-17 11:41:12,348 INFO L125 PetriNetUnfolderBase]: For 893/893 co-relation queries the response was YES. [2023-11-17 11:41:12,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75522 conditions, 38211 events. 25061/38211 cut-off events. For 893/893 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 269627 event pairs, 3882 based on Foata normal form. 0/31474 useless extension candidates. Maximal degree in co-relation 75486. Up to 27874 conditions per place. [2023-11-17 11:41:12,538 INFO L140 encePairwiseOnDemand]: 292/303 looper letters, 193 selfloop transitions, 18 changer transitions 0/220 dead transitions. [2023-11-17 11:41:12,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 220 transitions, 953 flow [2023-11-17 11:41:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:41:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:41:12,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 526 transitions. [2023-11-17 11:41:12,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2893289328932893 [2023-11-17 11:41:12,546 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 526 transitions. [2023-11-17 11:41:12,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 526 transitions. [2023-11-17 11:41:12,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:12,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 526 transitions. [2023-11-17 11:41:12,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 87.66666666666667) internal successors, (526), 6 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:12,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:12,555 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 303.0) internal successors, (2121), 7 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:12,555 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 238 flow. Second operand 6 states and 526 transitions. [2023-11-17 11:41:12,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 220 transitions, 953 flow [2023-11-17 11:41:12,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 220 transitions, 939 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-17 11:41:12,566 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 333 flow [2023-11-17 11:41:12,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=333, PETRI_PLACES=98, PETRI_TRANSITIONS=105} [2023-11-17 11:41:12,567 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 19 predicate places. [2023-11-17 11:41:12,567 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 333 flow [2023-11-17 11:41:12,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 54.666666666666664) internal successors, (328), 6 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:12,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:12,567 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1] [2023-11-17 11:41:12,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 11:41:12,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:12,773 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:41:12,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash -15920820, now seen corresponding path program 1 times [2023-11-17 11:41:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855134921] [2023-11-17 11:41:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:41:12,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:12,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855134921] [2023-11-17 11:41:12,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855134921] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:41:12,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387498093] [2023-11-17 11:41:12,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:12,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:12,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:41:12,860 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:41:12,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 11:41:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:12,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 11:41:12,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:41:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:41:12,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:41:12,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-17 11:41:12,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387498093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:41:12,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:41:12,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 11:41:12,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808041994] [2023-11-17 11:41:12,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:41:12,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:41:12,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:12,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:41:12,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:41:12,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 303 [2023-11-17 11:41:12,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 105 transitions, 333 flow. Second operand has 13 states, 13 states have (on average 54.38461538461539) internal successors, (707), 13 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:12,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:12,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 303 [2023-11-17 11:41:12,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:41:15,610 INFO L124 PetriNetUnfolderBase]: 25045/38021 cut-off events. [2023-11-17 11:41:15,611 INFO L125 PetriNetUnfolderBase]: For 6985/6985 co-relation queries the response was YES. [2023-11-17 11:41:15,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83144 conditions, 38021 events. 25045/38021 cut-off events. For 6985/6985 co-relation queries the response was YES. Maximal size of possible extension queue 1142. Compared 265641 event pairs, 20002 based on Foata normal form. 6/33278 useless extension candidates. Maximal degree in co-relation 83086. Up to 36412 conditions per place. [2023-11-17 11:41:15,853 INFO L140 encePairwiseOnDemand]: 300/303 looper letters, 91 selfloop transitions, 11 changer transitions 0/111 dead transitions. [2023-11-17 11:41:15,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 111 transitions, 573 flow [2023-11-17 11:41:15,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 11:41:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 11:41:15,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 727 transitions. [2023-11-17 11:41:15,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.19994499449944994 [2023-11-17 11:41:15,856 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 727 transitions. [2023-11-17 11:41:15,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 727 transitions. [2023-11-17 11:41:15,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:41:15,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 727 transitions. [2023-11-17 11:41:15,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 60.583333333333336) internal successors, (727), 12 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:15,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 303.0) internal successors, (3939), 13 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:15,864 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 303.0) internal successors, (3939), 13 states have internal predecessors, (3939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:15,865 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 333 flow. Second operand 12 states and 727 transitions. [2023-11-17 11:41:15,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 111 transitions, 573 flow [2023-11-17 11:41:15,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 573 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 11:41:15,909 INFO L231 Difference]: Finished difference. Result has 115 places, 111 transitions, 417 flow [2023-11-17 11:41:15,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=303, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=417, PETRI_PLACES=115, PETRI_TRANSITIONS=111} [2023-11-17 11:41:15,911 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 36 predicate places. [2023-11-17 11:41:15,911 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 111 transitions, 417 flow [2023-11-17 11:41:15,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 54.38461538461539) internal successors, (707), 13 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:15,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:15,912 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 1, 1, 1, 1, 1] [2023-11-17 11:41:15,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 11:41:16,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:41:16,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 11:41:16,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1555322412, now seen corresponding path program 2 times [2023-11-17 11:41:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519207230] [2023-11-17 11:41:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:16,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:16,140 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 11:41:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 11:41:16,164 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 11:41:16,165 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 11:41:16,166 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 11:41:16,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 11:41:16,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 11:41:16,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 11:41:16,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 11:41:16,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 11:41:16,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:41:16,166 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2023-11-17 11:41:16,167 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 11:41:16,167 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 11:41:16,197 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:41:16,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 227 transitions, 481 flow [2023-11-17 11:41:16,234 INFO L124 PetriNetUnfolderBase]: 148/510 cut-off events. [2023-11-17 11:41:16,234 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:41:16,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 510 events. 148/510 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2938 event pairs, 1 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 370. Up to 16 conditions per place. [2023-11-17 11:41:16,239 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 227 transitions, 481 flow [2023-11-17 11:41:16,245 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 227 transitions, 481 flow [2023-11-17 11:41:16,245 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:41:16,245 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 227 transitions, 481 flow [2023-11-17 11:41:16,245 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 227 transitions, 481 flow [2023-11-17 11:41:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 227 transitions, 481 flow [2023-11-17 11:41:16,277 INFO L124 PetriNetUnfolderBase]: 148/510 cut-off events. [2023-11-17 11:41:16,277 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 11:41:16,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 510 events. 148/510 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2938 event pairs, 1 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 370. Up to 16 conditions per place. [2023-11-17 11:41:16,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 34830 [2023-11-17 11:41:18,157 INFO L134 LiptonReduction]: Checked pairs total: 75331 [2023-11-17 11:41:18,157 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-17 11:41:18,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:41:18,159 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@780aaf8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:41:18,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 11:41:18,161 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:41:18,162 INFO L124 PetriNetUnfolderBase]: 19/55 cut-off events. [2023-11-17 11:41:18,162 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 11:41:18,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:41:18,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:41:18,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 11:41:18,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:41:18,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1430239505, now seen corresponding path program 1 times [2023-11-17 11:41:18,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:41:18,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112318220] [2023-11-17 11:41:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:41:18,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:41:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:41:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:41:18,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:41:18,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112318220] [2023-11-17 11:41:18,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112318220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:41:18,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:41:18,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:41:18,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182941910] [2023-11-17 11:41:18,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:41:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:41:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:41:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:41:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:41:18,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 373 [2023-11-17 11:41:18,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 160 transitions, 347 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:41:18,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:41:18,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 373 [2023-11-17 11:41:18,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand