/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:09:34,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:09:34,689 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 15:09:34,723 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:09:34,723 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:09:34,724 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:09:34,724 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:09:34,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:09:34,725 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:09:34,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:09:34,728 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:09:34,728 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:09:34,729 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:09:34,730 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:09:34,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:09:34,730 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:09:34,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:09:34,730 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:09:34,730 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:09:34,730 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:09:34,730 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:09:34,731 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:09:34,731 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:09:34,731 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:09:34,731 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:09:34,732 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:09:34,732 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:09:34,732 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:09:34,732 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:09:34,732 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:09:34,733 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:09:34,733 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:09:34,733 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:09:34,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:09:34,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:09:34,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:09:34,950 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:09:34,950 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:09:34,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i [2023-11-17 15:09:35,878 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:09:36,083 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:09:36,083 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i [2023-11-17 15:09:36,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/767bf040e/299853e96e194ad7b8156de11192088d/FLAG8cd78f43e [2023-11-17 15:09:36,118 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/767bf040e/299853e96e194ad7b8156de11192088d [2023-11-17 15:09:36,123 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:09:36,124 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:09:36,127 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:09:36,127 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:09:36,130 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:09:36,130 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,131 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c316f92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36, skipping insertion in model container [2023-11-17 15:09:36,131 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,165 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:09:36,340 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i[30711,30724] [2023-11-17 15:09:36,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:09:36,357 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:09:36,399 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs-pthread.i[30711,30724] [2023-11-17 15:09:36,402 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:09:36,426 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:09:36,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36 WrapperNode [2023-11-17 15:09:36,426 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:09:36,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:09:36,427 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:09:36,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:09:36,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,452 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,467 INFO L138 Inliner]: procedures = 165, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 69 [2023-11-17 15:09:36,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:09:36,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:09:36,468 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:09:36,468 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:09:36,475 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,480 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,480 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,483 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,485 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,486 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,492 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:09:36,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:09:36,493 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:09:36,493 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:09:36,493 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (1/1) ... [2023-11-17 15:09:36,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:09:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:09:36,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 15:09:36,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 15:09:36,536 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-11-17 15:09:36,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:09:36,537 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:09:36,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:09:36,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:09:36,538 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:09:36,640 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:09:36,642 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:09:36,764 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:09:36,791 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:09:36,791 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:09:36,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:09:36 BoogieIcfgContainer [2023-11-17 15:09:36,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:09:36,794 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:09:36,794 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:09:36,796 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:09:36,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:09:36" (1/3) ... [2023-11-17 15:09:36,799 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496e2cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:09:36, skipping insertion in model container [2023-11-17 15:09:36,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:09:36" (2/3) ... [2023-11-17 15:09:36,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@496e2cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:09:36, skipping insertion in model container [2023-11-17 15:09:36,800 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:09:36" (3/3) ... [2023-11-17 15:09:36,801 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs-pthread.i [2023-11-17 15:09:36,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:09:36,814 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:09:36,814 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:09:36,873 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 85 transitions, 178 flow [2023-11-17 15:09:36,933 INFO L124 PetriNetUnfolderBase]: 6/95 cut-off events. [2023-11-17 15:09:36,933 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:36,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 6/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 140 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-11-17 15:09:36,937 INFO L82 GeneralOperation]: Start removeDead. Operand has 86 places, 85 transitions, 178 flow [2023-11-17 15:09:36,940 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 84 transitions, 175 flow [2023-11-17 15:09:36,942 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:36,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 84 transitions, 175 flow [2023-11-17 15:09:36,953 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 84 transitions, 175 flow [2023-11-17 15:09:36,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 175 flow [2023-11-17 15:09:36,982 INFO L124 PetriNetUnfolderBase]: 6/95 cut-off events. [2023-11-17 15:09:36,982 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:36,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102 conditions, 95 events. 6/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 140 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 76. Up to 4 conditions per place. [2023-11-17 15:09:36,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 2308 [2023-11-17 15:09:38,553 INFO L134 LiptonReduction]: Checked pairs total: 3074 [2023-11-17 15:09:38,554 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-11-17 15:09:38,568 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:38,573 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;@3f981e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:38,573 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:09:38,576 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:38,576 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-17 15:09:38,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:38,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:38,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:09:38,577 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 15:09:38,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:38,581 INFO L85 PathProgramCache]: Analyzing trace with hash 349967039, now seen corresponding path program 1 times [2023-11-17 15:09:38,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:38,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760274669] [2023-11-17 15:09:38,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:38,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:38,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:38,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760274669] [2023-11-17 15:09:38,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760274669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:38,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:38,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:38,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050858748] [2023-11-17 15:09:38,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:38,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:09:38,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:38,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:09:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:09:38,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 155 [2023-11-17 15:09:38,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:38,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:38,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 155 [2023-11-17 15:09:38,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:38,847 INFO L124 PetriNetUnfolderBase]: 232/390 cut-off events. [2023-11-17 15:09:38,847 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:38,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 390 events. 232/390 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1306 event pairs, 66 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 779. Up to 278 conditions per place. [2023-11-17 15:09:38,851 INFO L140 encePairwiseOnDemand]: 149/155 looper letters, 22 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-11-17 15:09:38,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 107 flow [2023-11-17 15:09:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:09:38,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:09:38,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-11-17 15:09:38,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45376344086021503 [2023-11-17 15:09:38,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-11-17 15:09:38,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-11-17 15:09:38,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:38,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-11-17 15:09:38,866 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 15:09:38,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:38,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:38,870 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 55 flow. Second operand 3 states and 211 transitions. [2023-11-17 15:09:38,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 107 flow [2023-11-17 15:09:38,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:09:38,873 INFO L231 Difference]: Finished difference. Result has 27 places, 21 transitions, 56 flow [2023-11-17 15:09:38,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=27, PETRI_TRANSITIONS=21} [2023-11-17 15:09:38,877 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-11-17 15:09:38,877 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 21 transitions, 56 flow [2023-11-17 15:09:38,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:38,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:38,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:38,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:09:38,878 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 15:09:38,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:38,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1513120717, now seen corresponding path program 1 times [2023-11-17 15:09:38,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:38,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789973134] [2023-11-17 15:09:38,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:38,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:38,895 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:38,916 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:38,916 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:38,917 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:09:38,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:09:38,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 15:09:38,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:09:38,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:09:38,919 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:09:38,921 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:38,921 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:09:38,936 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:38,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 133 transitions, 286 flow [2023-11-17 15:09:38,950 INFO L124 PetriNetUnfolderBase]: 8/140 cut-off events. [2023-11-17 15:09:38,950 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:38,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 140 events. 8/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 147. Up to 6 conditions per place. [2023-11-17 15:09:38,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 133 transitions, 286 flow [2023-11-17 15:09:38,952 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 116 transitions, 245 flow [2023-11-17 15:09:38,952 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:38,954 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 116 transitions, 245 flow [2023-11-17 15:09:38,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 116 transitions, 245 flow [2023-11-17 15:09:38,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 116 transitions, 245 flow [2023-11-17 15:09:38,967 INFO L124 PetriNetUnfolderBase]: 8/140 cut-off events. [2023-11-17 15:09:38,967 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:09:38,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 140 events. 8/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 271 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 124. Up to 6 conditions per place. [2023-11-17 15:09:38,973 INFO L119 LiptonReduction]: Number of co-enabled transitions 6120 [2023-11-17 15:09:40,583 INFO L134 LiptonReduction]: Checked pairs total: 13058 [2023-11-17 15:09:40,584 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-11-17 15:09:40,586 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:40,586 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;@3f981e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:40,586 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:09:40,588 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:40,588 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-17 15:09:40,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:40,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:40,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:09:40,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 15:09:40,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:40,589 INFO L85 PathProgramCache]: Analyzing trace with hash 606999024, now seen corresponding path program 1 times [2023-11-17 15:09:40,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:40,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052728930] [2023-11-17 15:09:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:40,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:40,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:40,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052728930] [2023-11-17 15:09:40,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052728930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:40,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:40,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:40,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065907682] [2023-11-17 15:09:40,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:40,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:09:40,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:40,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:09:40,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:09:40,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 222 [2023-11-17 15:09:40,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:40,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:40,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 222 [2023-11-17 15:09:40,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:41,095 INFO L124 PetriNetUnfolderBase]: 4526/6453 cut-off events. [2023-11-17 15:09:41,096 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-17 15:09:41,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13064 conditions, 6453 events. 4526/6453 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34191 event pairs, 1323 based on Foata normal form. 0/5797 useless extension candidates. Maximal degree in co-relation 13053. Up to 5903 conditions per place. [2023-11-17 15:09:41,129 INFO L140 encePairwiseOnDemand]: 215/222 looper letters, 46 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-11-17 15:09:41,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 222 flow [2023-11-17 15:09:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:09:41,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:09:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-11-17 15:09:41,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47147147147147145 [2023-11-17 15:09:41,135 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-11-17 15:09:41,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-11-17 15:09:41,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:41,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-11-17 15:09:41,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,139 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,140 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 99 flow. Second operand 3 states and 314 transitions. [2023-11-17 15:09:41,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 222 flow [2023-11-17 15:09:41,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 221 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:09:41,142 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2023-11-17 15:09:41,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-17 15:09:41,143 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-11-17 15:09:41,143 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2023-11-17 15:09:41,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:41,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:09:41,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 15:09:41,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:41,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1090985791, now seen corresponding path program 1 times [2023-11-17 15:09:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:41,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599877289] [2023-11-17 15:09:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:41,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:41,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599877289] [2023-11-17 15:09:41,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599877289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:41,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:41,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:09:41,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116189830] [2023-11-17 15:09:41,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:41,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:09:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:09:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:09:41,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 222 [2023-11-17 15:09:41,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:41,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 222 [2023-11-17 15:09:41,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:41,394 INFO L124 PetriNetUnfolderBase]: 448/927 cut-off events. [2023-11-17 15:09:41,394 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2023-11-17 15:09:41,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1966 conditions, 927 events. 448/927 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5463 event pairs, 83 based on Foata normal form. 346/1215 useless extension candidates. Maximal degree in co-relation 1953. Up to 670 conditions per place. [2023-11-17 15:09:41,399 INFO L140 encePairwiseOnDemand]: 212/222 looper letters, 29 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2023-11-17 15:09:41,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 48 transitions, 209 flow [2023-11-17 15:09:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:09:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:09:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-11-17 15:09:41,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195195195195195 [2023-11-17 15:09:41,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-11-17 15:09:41,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-11-17 15:09:41,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:41,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-11-17 15:09:41,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 222.0) internal successors, (888), 4 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,404 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 3 states and 346 transitions. [2023-11-17 15:09:41,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 48 transitions, 209 flow [2023-11-17 15:09:41,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:09:41,407 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 128 flow [2023-11-17 15:09:41,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=222, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-11-17 15:09:41,410 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 1 predicate places. [2023-11-17 15:09:41,410 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 128 flow [2023-11-17 15:09:41,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:41,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:41,411 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:41,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:09:41,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 15:09:41,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1332955874, now seen corresponding path program 1 times [2023-11-17 15:09:41,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:41,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029285229] [2023-11-17 15:09:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:41,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:41,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:41,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:41,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:41,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:09:41,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:09:41,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-11-17 15:09:41,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:09:41,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:09:41,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:09:41,447 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:09:41,449 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:41,449 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:09:41,477 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:41,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 182 places, 181 transitions, 398 flow [2023-11-17 15:09:41,498 INFO L124 PetriNetUnfolderBase]: 10/185 cut-off events. [2023-11-17 15:09:41,498 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:09:41,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203 conditions, 185 events. 10/185 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 448 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 196. Up to 8 conditions per place. [2023-11-17 15:09:41,499 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 181 transitions, 398 flow [2023-11-17 15:09:41,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 148 transitions, 317 flow [2023-11-17 15:09:41,500 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:41,500 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 148 transitions, 317 flow [2023-11-17 15:09:41,500 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 148 transitions, 317 flow [2023-11-17 15:09:41,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 148 transitions, 317 flow [2023-11-17 15:09:41,511 INFO L124 PetriNetUnfolderBase]: 10/185 cut-off events. [2023-11-17 15:09:41,512 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:09:41,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 185 events. 10/185 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 451 event pairs, 0 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 173. Up to 8 conditions per place. [2023-11-17 15:09:41,517 INFO L119 LiptonReduction]: Number of co-enabled transitions 11916 [2023-11-17 15:09:43,395 INFO L134 LiptonReduction]: Checked pairs total: 29738 [2023-11-17 15:09:43,395 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-11-17 15:09:43,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:43,397 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;@3f981e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:43,397 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:09:43,399 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:43,399 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-17 15:09:43,399 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:43,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:43,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:09:43,399 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 15:09:43,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash 927983873, now seen corresponding path program 1 times [2023-11-17 15:09:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:43,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195861083] [2023-11-17 15:09:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:43,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:43,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:43,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195861083] [2023-11-17 15:09:43,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195861083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:43,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:43,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:43,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195198333] [2023-11-17 15:09:43,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:43,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:09:43,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:43,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:09:43,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:09:43,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 289 [2023-11-17 15:09:43,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:43,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:43,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 289 [2023-11-17 15:09:43,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:48,850 INFO L124 PetriNetUnfolderBase]: 82862/107175 cut-off events. [2023-11-17 15:09:48,851 INFO L125 PetriNetUnfolderBase]: For 5524/5524 co-relation queries the response was YES. [2023-11-17 15:09:48,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217791 conditions, 107175 events. 82862/107175 cut-off events. For 5524/5524 co-relation queries the response was YES. Maximal size of possible extension queue 2968. Compared 631841 event pairs, 29321 based on Foata normal form. 0/96866 useless extension candidates. Maximal degree in co-relation 217779. Up to 104467 conditions per place. [2023-11-17 15:09:49,504 INFO L140 encePairwiseOnDemand]: 281/289 looper letters, 64 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2023-11-17 15:09:49,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 72 transitions, 313 flow [2023-11-17 15:09:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:09:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:09:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-11-17 15:09:49,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740484429065744 [2023-11-17 15:09:49,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-11-17 15:09:49,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-11-17 15:09:49,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:49,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-11-17 15:09:49,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,509 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 135 flow. Second operand 3 states and 411 transitions. [2023-11-17 15:09:49,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 72 transitions, 313 flow [2023-11-17 15:09:49,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 308 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 15:09:49,514 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 152 flow [2023-11-17 15:09:49,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-17 15:09:49,516 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2023-11-17 15:09:49,516 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 152 flow [2023-11-17 15:09:49,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:49,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:49,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:09:49,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 15:09:49,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:49,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1616203002, now seen corresponding path program 1 times [2023-11-17 15:09:49,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:49,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497578668] [2023-11-17 15:09:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:49,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:49,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:49,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:49,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497578668] [2023-11-17 15:09:49,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497578668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:49,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:49,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:09:49,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697646022] [2023-11-17 15:09:49,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:49,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:09:49,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:49,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:09:49,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:09:49,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 289 [2023-11-17 15:09:49,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:49,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 289 [2023-11-17 15:09:49,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:49,814 INFO L124 PetriNetUnfolderBase]: 2031/4040 cut-off events. [2023-11-17 15:09:49,815 INFO L125 PetriNetUnfolderBase]: For 538/538 co-relation queries the response was YES. [2023-11-17 15:09:49,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8192 conditions, 4040 events. 2031/4040 cut-off events. For 538/538 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 30066 event pairs, 343 based on Foata normal form. 1604/5393 useless extension candidates. Maximal degree in co-relation 8178. Up to 2630 conditions per place. [2023-11-17 15:09:49,830 INFO L140 encePairwiseOnDemand]: 275/289 looper letters, 32 selfloop transitions, 14 changer transitions 0/65 dead transitions. [2023-11-17 15:09:49,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 65 transitions, 273 flow [2023-11-17 15:09:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:09:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:09:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-11-17 15:09:49,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351787773933102 [2023-11-17 15:09:49,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-11-17 15:09:49,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-11-17 15:09:49,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:49,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-11-17 15:09:49,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,835 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 289.0) internal successors, (1156), 4 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,835 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 152 flow. Second operand 3 states and 464 transitions. [2023-11-17 15:09:49,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 65 transitions, 273 flow [2023-11-17 15:09:49,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:09:49,838 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 176 flow [2023-11-17 15:09:49,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-17 15:09:49,839 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2023-11-17 15:09:49,839 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 176 flow [2023-11-17 15:09:49,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:49,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:49,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:09:49,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 15:09:49,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:49,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2138374298, now seen corresponding path program 1 times [2023-11-17 15:09:49,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:49,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331522670] [2023-11-17 15:09:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:49,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:49,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:49,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331522670] [2023-11-17 15:09:49,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331522670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:49,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:49,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 15:09:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908399160] [2023-11-17 15:09:49,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:09:49,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:49,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:09:49,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:09:49,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 289 [2023-11-17 15:09:49,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 176 flow. Second operand has 7 states, 7 states have (on average 109.85714285714286) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:49,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:49,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 289 [2023-11-17 15:09:49,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:09:50,363 INFO L124 PetriNetUnfolderBase]: 2921/5084 cut-off events. [2023-11-17 15:09:50,363 INFO L125 PetriNetUnfolderBase]: For 914/914 co-relation queries the response was YES. [2023-11-17 15:09:50,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11993 conditions, 5084 events. 2921/5084 cut-off events. For 914/914 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 35069 event pairs, 357 based on Foata normal form. 14/5041 useless extension candidates. Maximal degree in co-relation 11979. Up to 3704 conditions per place. [2023-11-17 15:09:50,379 INFO L140 encePairwiseOnDemand]: 279/289 looper letters, 97 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2023-11-17 15:09:50,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 112 transitions, 588 flow [2023-11-17 15:09:50,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 15:09:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 15:09:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 973 transitions. [2023-11-17 15:09:50,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4208477508650519 [2023-11-17 15:09:50,382 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 973 transitions. [2023-11-17 15:09:50,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 973 transitions. [2023-11-17 15:09:50,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:09:50,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 973 transitions. [2023-11-17 15:09:50,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.625) internal successors, (973), 8 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:50,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:50,387 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 289.0) internal successors, (2601), 9 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:50,387 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 176 flow. Second operand 8 states and 973 transitions. [2023-11-17 15:09:50,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 112 transitions, 588 flow [2023-11-17 15:09:50,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 112 transitions, 563 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:09:50,390 INFO L231 Difference]: Finished difference. Result has 74 places, 64 transitions, 233 flow [2023-11-17 15:09:50,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=289, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=233, PETRI_PLACES=74, PETRI_TRANSITIONS=64} [2023-11-17 15:09:50,391 INFO L281 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2023-11-17 15:09:50,391 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 64 transitions, 233 flow [2023-11-17 15:09:50,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 109.85714285714286) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:50,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:50,391 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:09:50,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:09:50,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-11-17 15:09:50,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:50,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1494676343, now seen corresponding path program 1 times [2023-11-17 15:09:50,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:50,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538963932] [2023-11-17 15:09:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:50,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:50,401 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:09:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:09:50,408 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:09:50,408 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:09:50,408 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:09:50,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:09:50,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 6 remaining) [2023-11-17 15:09:50,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:09:50,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:09:50,409 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:09:50,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:09:50,409 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:09:50,410 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:09:50,410 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:09:50,435 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:09:50,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 229 transitions, 514 flow [2023-11-17 15:09:50,460 INFO L124 PetriNetUnfolderBase]: 12/230 cut-off events. [2023-11-17 15:09:50,460 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:09:50,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 230 events. 12/230 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 639 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 246. Up to 10 conditions per place. [2023-11-17 15:09:50,461 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 229 transitions, 514 flow [2023-11-17 15:09:50,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 184 places, 180 transitions, 391 flow [2023-11-17 15:09:50,462 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:09:50,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 184 places, 180 transitions, 391 flow [2023-11-17 15:09:50,463 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 184 places, 180 transitions, 391 flow [2023-11-17 15:09:50,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 184 places, 180 transitions, 391 flow [2023-11-17 15:09:50,480 INFO L124 PetriNetUnfolderBase]: 12/230 cut-off events. [2023-11-17 15:09:50,480 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:09:50,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 230 events. 12/230 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 639 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 223. Up to 10 conditions per place. [2023-11-17 15:09:50,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 19696 [2023-11-17 15:09:52,576 INFO L134 LiptonReduction]: Checked pairs total: 46206 [2023-11-17 15:09:52,577 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-11-17 15:09:52,578 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:09:52,579 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;@3f981e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:09:52,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:09:52,580 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:09:52,580 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-11-17 15:09:52,580 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:09:52,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:09:52,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:09:52,580 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-11-17 15:09:52,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:09:52,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1314768829, now seen corresponding path program 1 times [2023-11-17 15:09:52,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:09:52,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261588224] [2023-11-17 15:09:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:09:52,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:09:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:09:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:09:52,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:09:52,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261588224] [2023-11-17 15:09:52,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261588224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:09:52,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:09:52,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:09:52,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105236821] [2023-11-17 15:09:52,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:09:52,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:09:52,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:09:52,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:09:52,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:09:52,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 358 [2023-11-17 15:09:52,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:09:52,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:09:52,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 358 [2023-11-17 15:09:52,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand