/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/39_rand_lock_p0_vs-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:10:30,762 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:10:30,815 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 15:10:30,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:10:30,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:10:30,838 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:10:30,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:10:30,839 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:10:30,839 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:10:30,840 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:10:30,840 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:10:30,840 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:10:30,840 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:10:30,841 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:10:30,841 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:10:30,841 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:10:30,841 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:10:30,841 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:10:30,842 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:10:30,842 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:10:30,842 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:10:30,849 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:10:30,849 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:10:30,849 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:10:30,852 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:10:30,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:30,852 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:10:30,853 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:10:30,853 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:10:30,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:10:30,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:10:30,854 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:10:30,854 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:10:31,045 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:10:31,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:10:31,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:10:31,067 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:10:31,067 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:10:31,068 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs-pthread.i [2023-11-17 15:10:32,133 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:10:32,316 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:10:32,317 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs-pthread.i [2023-11-17 15:10:32,327 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f008e0b/c8444898f1cb459397f52b8d8039ab0f/FLAG099a02704 [2023-11-17 15:10:32,336 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8f008e0b/c8444898f1cb459397f52b8d8039ab0f [2023-11-17 15:10:32,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:10:32,339 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:10:32,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:32,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:10:32,346 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:10:32,347 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,347 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e9f5178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32, skipping insertion in model container [2023-11-17 15:10:32,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,393 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:10:32,670 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/39_rand_lock_p0_vs-pthread.i[30745,30758] [2023-11-17 15:10:32,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:32,700 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:10:32,728 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/39_rand_lock_p0_vs-pthread.i[30745,30758] [2023-11-17 15:10:32,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:10:32,755 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:32,755 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 15:10:32,761 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:10:32,761 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32 WrapperNode [2023-11-17 15:10:32,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:10:32,762 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:32,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:10:32,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:10:32,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,789 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,804 INFO L138 Inliner]: procedures = 167, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-11-17 15:10:32,804 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:10:32,805 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:10:32,805 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:10:32,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:10:32,811 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,811 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,813 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,813 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,817 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,820 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,821 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,823 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:10:32,824 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:10:32,824 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:10:32,824 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:10:32,824 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (1/1) ... [2023-11-17 15:10:32,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:10:32,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:10:32,866 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 15:10:32,873 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 15:10:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-17 15:10:32,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-17 15:10:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:10:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:10:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 15:10:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:10:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:10:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:10:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:10:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 15:10:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:10:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:10:32,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:10:32,893 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 15:10:32,986 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:10:32,988 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:10:33,100 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:10:33,118 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:10:33,118 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:10:33,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:33 BoogieIcfgContainer [2023-11-17 15:10:33,119 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:10:33,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:10:33,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:10:33,124 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:10:33,124 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:10:32" (1/3) ... [2023-11-17 15:10:33,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8f3dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:33, skipping insertion in model container [2023-11-17 15:10:33,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:10:32" (2/3) ... [2023-11-17 15:10:33,125 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a8f3dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:10:33, skipping insertion in model container [2023-11-17 15:10:33,125 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:10:33" (3/3) ... [2023-11-17 15:10:33,126 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs-pthread.i [2023-11-17 15:10:33,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:10:33,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:10:33,140 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:10:33,199 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:33,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 74 transitions, 152 flow [2023-11-17 15:10:33,246 INFO L124 PetriNetUnfolderBase]: 5/85 cut-off events. [2023-11-17 15:10:33,246 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:33,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 5/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-11-17 15:10:33,250 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 74 transitions, 152 flow [2023-11-17 15:10:33,253 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 74 transitions, 152 flow [2023-11-17 15:10:33,255 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:33,263 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 74 transitions, 152 flow [2023-11-17 15:10:33,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 74 transitions, 152 flow [2023-11-17 15:10:33,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 74 transitions, 152 flow [2023-11-17 15:10:33,279 INFO L124 PetriNetUnfolderBase]: 5/85 cut-off events. [2023-11-17 15:10:33,279 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:33,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 85 events. 5/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 55. Up to 4 conditions per place. [2023-11-17 15:10:33,281 INFO L119 LiptonReduction]: Number of co-enabled transitions 1176 [2023-11-17 15:10:34,861 INFO L134 LiptonReduction]: Checked pairs total: 985 [2023-11-17 15:10:34,861 INFO L136 LiptonReduction]: Total number of compositions: 75 [2023-11-17 15:10:34,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:34,880 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;@3d62d3f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:34,881 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 15:10:34,882 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:34,882 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:34,882 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:34,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:34,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:34,883 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:34,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:34,887 INFO L85 PathProgramCache]: Analyzing trace with hash 10412358, now seen corresponding path program 1 times [2023-11-17 15:10:34,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:34,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636517355] [2023-11-17 15:10:34,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:34,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:34,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:35,033 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 15:10:35,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:35,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636517355] [2023-11-17 15:10:35,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636517355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:35,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:35,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:35,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807277769] [2023-11-17 15:10:35,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:35,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:35,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:35,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:35,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 149 [2023-11-17 15:10:35,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 10 transitions, 24 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 15:10:35,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:35,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 149 [2023-11-17 15:10:35,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:35,084 INFO L124 PetriNetUnfolderBase]: 7/20 cut-off events. [2023-11-17 15:10:35,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:35,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 20 events. 7/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 2 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 30. Up to 13 conditions per place. [2023-11-17 15:10:35,085 INFO L140 encePairwiseOnDemand]: 145/149 looper letters, 7 selfloop transitions, 2 changer transitions 0/10 dead transitions. [2023-11-17 15:10:35,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 10 transitions, 42 flow [2023-11-17 15:10:35,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-11-17 15:10:35,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429530201342282 [2023-11-17 15:10:35,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-11-17 15:10:35,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-11-17 15:10:35,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:35,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-11-17 15:10:35,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 15:10:35,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 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 15:10:35,108 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 149.0) internal successors, (596), 4 states have internal predecessors, (596), 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 15:10:35,109 INFO L175 Difference]: Start difference. First operand has 12 places, 10 transitions, 24 flow. Second operand 3 states and 198 transitions. [2023-11-17 15:10:35,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 10 transitions, 42 flow [2023-11-17 15:10:35,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:35,112 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 24 flow [2023-11-17 15:10:35,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=149, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=24, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2023-11-17 15:10:35,117 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 0 predicate places. [2023-11-17 15:10:35,117 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 24 flow [2023-11-17 15:10:35,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 15:10:35,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:35,118 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:10:35,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:10:35,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-17 15:10:35,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:35,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1416310216, now seen corresponding path program 1 times [2023-11-17 15:10:35,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321253123] [2023-11-17 15:10:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:35,154 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:35,203 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:35,203 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:35,204 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-11-17 15:10:35,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-11-17 15:10:35,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-11-17 15:10:35,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:10:35,206 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:35,208 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:35,208 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:10:35,222 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:35,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 244 flow [2023-11-17 15:10:35,248 INFO L124 PetriNetUnfolderBase]: 9/141 cut-off events. [2023-11-17 15:10:35,248 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:35,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 141 events. 9/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2023-11-17 15:10:35,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 117 transitions, 244 flow [2023-11-17 15:10:35,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 117 transitions, 244 flow [2023-11-17 15:10:35,250 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:35,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 117 transitions, 244 flow [2023-11-17 15:10:35,251 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 117 transitions, 244 flow [2023-11-17 15:10:35,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 244 flow [2023-11-17 15:10:35,266 INFO L124 PetriNetUnfolderBase]: 9/141 cut-off events. [2023-11-17 15:10:35,266 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 15:10:35,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 141 events. 9/141 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2023-11-17 15:10:35,270 INFO L119 LiptonReduction]: Number of co-enabled transitions 5964 [2023-11-17 15:10:37,305 INFO L134 LiptonReduction]: Checked pairs total: 6806 [2023-11-17 15:10:37,305 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-11-17 15:10:37,308 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:37,309 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;@3d62d3f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:37,309 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:10:37,311 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:37,311 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:37,311 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:37,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:37,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:37,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:37,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash 19043900, now seen corresponding path program 1 times [2023-11-17 15:10:37,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:37,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460968973] [2023-11-17 15:10:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:37,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:37,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:37,391 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 15:10:37,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460968973] [2023-11-17 15:10:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460968973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:37,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:37,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347165708] [2023-11-17 15:10:37,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:37,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:37,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 242 [2023-11-17 15:10:37,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 24 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 15:10:37,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:37,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 242 [2023-11-17 15:10:37,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:37,434 INFO L124 PetriNetUnfolderBase]: 94/175 cut-off events. [2023-11-17 15:10:37,434 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:37,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 175 events. 94/175 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 668 event pairs, 28 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 168. Up to 105 conditions per place. [2023-11-17 15:10:37,436 INFO L140 encePairwiseOnDemand]: 232/242 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2023-11-17 15:10:37,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 125 flow [2023-11-17 15:10:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:37,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:37,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-11-17 15:10:37,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4490358126721763 [2023-11-17 15:10:37,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-11-17 15:10:37,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-11-17 15:10:37,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:37,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-11-17 15:10:37,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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 15:10:37,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 15:10:37,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 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 15:10:37,441 INFO L175 Difference]: Start difference. First operand has 23 places, 24 transitions, 58 flow. Second operand 3 states and 326 transitions. [2023-11-17 15:10:37,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 125 flow [2023-11-17 15:10:37,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 29 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:37,442 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 69 flow [2023-11-17 15:10:37,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-11-17 15:10:37,443 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2023-11-17 15:10:37,443 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 69 flow [2023-11-17 15:10:37,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 15:10:37,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:37,443 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:10:37,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:10:37,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:10:37,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1732565165, now seen corresponding path program 1 times [2023-11-17 15:10:37,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:37,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861374210] [2023-11-17 15:10:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:37,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:37,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:37,463 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:37,464 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:37,464 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:10:37,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:10:37,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:10:37,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:10:37,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:10:37,464 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:10:37,465 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:37,465 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:10:37,484 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:37,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 160 transitions, 338 flow [2023-11-17 15:10:37,511 INFO L124 PetriNetUnfolderBase]: 13/197 cut-off events. [2023-11-17 15:10:37,511 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:37,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 197 events. 13/197 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 465 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-11-17 15:10:37,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 160 transitions, 338 flow [2023-11-17 15:10:37,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 160 transitions, 338 flow [2023-11-17 15:10:37,517 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:37,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 157 places, 160 transitions, 338 flow [2023-11-17 15:10:37,518 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 157 places, 160 transitions, 338 flow [2023-11-17 15:10:37,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 160 transitions, 338 flow [2023-11-17 15:10:37,538 INFO L124 PetriNetUnfolderBase]: 13/197 cut-off events. [2023-11-17 15:10:37,538 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-17 15:10:37,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 197 events. 13/197 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 465 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 145. Up to 8 conditions per place. [2023-11-17 15:10:37,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 14364 [2023-11-17 15:10:39,975 INFO L134 LiptonReduction]: Checked pairs total: 15837 [2023-11-17 15:10:39,976 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-11-17 15:10:39,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:39,978 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;@3d62d3f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:39,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:10:39,979 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:39,979 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:39,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:39,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:39,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:39,980 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:39,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:39,980 INFO L85 PathProgramCache]: Analyzing trace with hash 30255820, now seen corresponding path program 1 times [2023-11-17 15:10:39,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:39,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645726195] [2023-11-17 15:10:39,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:39,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:40,055 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 15:10:40,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:40,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645726195] [2023-11-17 15:10:40,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645726195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:40,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:40,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:40,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962968492] [2023-11-17 15:10:40,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:40,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:40,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:40,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 329 [2023-11-17 15:10:40,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 15:10:40,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:40,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 329 [2023-11-17 15:10:40,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:40,193 INFO L124 PetriNetUnfolderBase]: 976/1439 cut-off events. [2023-11-17 15:10:40,193 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2023-11-17 15:10:40,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2981 conditions, 1439 events. 976/1439 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 6762 event pairs, 268 based on Foata normal form. 0/1100 useless extension candidates. Maximal degree in co-relation 736. Up to 1147 conditions per place. [2023-11-17 15:10:40,201 INFO L140 encePairwiseOnDemand]: 317/329 looper letters, 34 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2023-11-17 15:10:40,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 41 transitions, 188 flow [2023-11-17 15:10:40,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:40,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:40,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-11-17 15:10:40,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2023-11-17 15:10:40,207 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-11-17 15:10:40,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-11-17 15:10:40,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:40,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-11-17 15:10:40,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 15:10:40,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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 15:10:40,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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 15:10:40,213 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 80 flow. Second operand 3 states and 441 transitions. [2023-11-17 15:10:40,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 41 transitions, 188 flow [2023-11-17 15:10:40,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 41 transitions, 184 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:40,221 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 98 flow [2023-11-17 15:10:40,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-11-17 15:10:40,223 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-11-17 15:10:40,223 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 98 flow [2023-11-17 15:10:40,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 15:10:40,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:40,223 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:40,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:10:40,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:40,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:40,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1725521975, now seen corresponding path program 1 times [2023-11-17 15:10:40,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:40,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76200024] [2023-11-17 15:10:40,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:40,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:40,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:40,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76200024] [2023-11-17 15:10:40,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76200024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:40,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:40,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:40,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017716311] [2023-11-17 15:10:40,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:40,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:40,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:40,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:40,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:40,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 329 [2023-11-17 15:10:40,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 15:10:40,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:40,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 329 [2023-11-17 15:10:40,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:40,413 INFO L124 PetriNetUnfolderBase]: 736/1112 cut-off events. [2023-11-17 15:10:40,414 INFO L125 PetriNetUnfolderBase]: For 294/294 co-relation queries the response was YES. [2023-11-17 15:10:40,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2500 conditions, 1112 events. 736/1112 cut-off events. For 294/294 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4723 event pairs, 516 based on Foata normal form. 104/1186 useless extension candidates. Maximal degree in co-relation 806. Up to 1048 conditions per place. [2023-11-17 15:10:40,419 INFO L140 encePairwiseOnDemand]: 325/329 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-11-17 15:10:40,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 132 flow [2023-11-17 15:10:40,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-11-17 15:10:40,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41843971631205673 [2023-11-17 15:10:40,421 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-11-17 15:10:40,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-11-17 15:10:40,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:40,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-11-17 15:10:40,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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 15:10:40,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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 15:10:40,424 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 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 15:10:40,424 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 98 flow. Second operand 3 states and 413 transitions. [2023-11-17 15:10:40,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 132 flow [2023-11-17 15:10:40,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:40,427 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 84 flow [2023-11-17 15:10:40,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-11-17 15:10:40,428 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-11-17 15:10:40,428 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 84 flow [2023-11-17 15:10:40,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 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 15:10:40,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:40,429 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:10:40,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:10:40,429 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:10:40,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1240305716, now seen corresponding path program 1 times [2023-11-17 15:10:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117370879] [2023-11-17 15:10:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:40,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:40,438 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:40,448 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:40,448 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:40,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:10:40,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:10:40,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:10:40,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:10:40,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:10:40,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:10:40,449 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:10:40,449 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:40,449 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:10:40,468 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:40,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 203 transitions, 434 flow [2023-11-17 15:10:40,491 INFO L124 PetriNetUnfolderBase]: 17/253 cut-off events. [2023-11-17 15:10:40,491 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:40,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 253 events. 17/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 725 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 205. Up to 10 conditions per place. [2023-11-17 15:10:40,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 203 transitions, 434 flow [2023-11-17 15:10:40,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 203 transitions, 434 flow [2023-11-17 15:10:40,495 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:40,495 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 203 transitions, 434 flow [2023-11-17 15:10:40,495 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 203 transitions, 434 flow [2023-11-17 15:10:40,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 203 transitions, 434 flow [2023-11-17 15:10:40,515 INFO L124 PetriNetUnfolderBase]: 17/253 cut-off events. [2023-11-17 15:10:40,515 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-17 15:10:40,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 253 events. 17/253 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 725 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 205. Up to 10 conditions per place. [2023-11-17 15:10:40,527 INFO L119 LiptonReduction]: Number of co-enabled transitions 26376 [2023-11-17 15:10:43,514 INFO L134 LiptonReduction]: Checked pairs total: 30529 [2023-11-17 15:10:43,514 INFO L136 LiptonReduction]: Total number of compositions: 218 [2023-11-17 15:10:43,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:43,526 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;@3d62d3f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:43,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:10:43,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:43,528 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:43,528 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:43,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:43,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:43,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:43,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash 44761931, now seen corresponding path program 1 times [2023-11-17 15:10:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:43,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921996583] [2023-11-17 15:10:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:43,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:43,552 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 15:10:43,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:43,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921996583] [2023-11-17 15:10:43,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921996583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:43,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:43,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:43,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965547885] [2023-11-17 15:10:43,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:43,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:43,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:43,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:43,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 421 [2023-11-17 15:10:43,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 41 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 15:10:43,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:43,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 421 [2023-11-17 15:10:43,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:44,393 INFO L124 PetriNetUnfolderBase]: 8706/11483 cut-off events. [2023-11-17 15:10:44,394 INFO L125 PetriNetUnfolderBase]: For 2094/2094 co-relation queries the response was YES. [2023-11-17 15:10:44,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23893 conditions, 11483 events. 8706/11483 cut-off events. For 2094/2094 co-relation queries the response was YES. Maximal size of possible extension queue 676. Compared 58374 event pairs, 2414 based on Foata normal form. 0/8461 useless extension candidates. Maximal degree in co-relation 3011. Up to 10363 conditions per place. [2023-11-17 15:10:44,474 INFO L140 encePairwiseOnDemand]: 404/421 looper letters, 45 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-11-17 15:10:44,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 255 flow [2023-11-17 15:10:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:44,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2023-11-17 15:10:44,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444972288202692 [2023-11-17 15:10:44,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2023-11-17 15:10:44,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2023-11-17 15:10:44,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:44,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2023-11-17 15:10:44,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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 15:10:44,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 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 15:10:44,479 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 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 15:10:44,479 INFO L175 Difference]: Start difference. First operand has 39 places, 41 transitions, 110 flow. Second operand 3 states and 562 transitions. [2023-11-17 15:10:44,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 255 flow [2023-11-17 15:10:44,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 243 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:44,483 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 127 flow [2023-11-17 15:10:44,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-11-17 15:10:44,485 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-11-17 15:10:44,485 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 127 flow [2023-11-17 15:10:44,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 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 15:10:44,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:44,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:44,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 15:10:44,485 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:44,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash 306930258, now seen corresponding path program 1 times [2023-11-17 15:10:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:44,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144024378] [2023-11-17 15:10:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:44,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:44,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:44,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:44,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144024378] [2023-11-17 15:10:44,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144024378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:44,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:44,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:44,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261064691] [2023-11-17 15:10:44,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:44,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:44,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:44,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 421 [2023-11-17 15:10:44,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 15:10:44,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:44,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 421 [2023-11-17 15:10:44,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:45,121 INFO L124 PetriNetUnfolderBase]: 5236/7096 cut-off events. [2023-11-17 15:10:45,122 INFO L125 PetriNetUnfolderBase]: For 2212/2212 co-relation queries the response was YES. [2023-11-17 15:10:45,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15826 conditions, 7096 events. 5236/7096 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 33152 event pairs, 3688 based on Foata normal form. 888/7845 useless extension candidates. Maximal degree in co-relation 5440. Up to 6798 conditions per place. [2023-11-17 15:10:45,154 INFO L140 encePairwiseOnDemand]: 416/421 looper letters, 29 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-11-17 15:10:45,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 171 flow [2023-11-17 15:10:45,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:45,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-11-17 15:10:45,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41330166270783847 [2023-11-17 15:10:45,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-11-17 15:10:45,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-11-17 15:10:45,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:45,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-11-17 15:10:45,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 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 15:10:45,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 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 15:10:45,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 421.0) internal successors, (1684), 4 states have internal predecessors, (1684), 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 15:10:45,159 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 127 flow. Second operand 3 states and 522 transitions. [2023-11-17 15:10:45,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 171 flow [2023-11-17 15:10:45,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:45,163 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 108 flow [2023-11-17 15:10:45,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=421, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-11-17 15:10:45,165 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -1 predicate places. [2023-11-17 15:10:45,165 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 108 flow [2023-11-17 15:10:45,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 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 15:10:45,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:45,165 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:45,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:10:45,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:10:45,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:45,166 INFO L85 PathProgramCache]: Analyzing trace with hash -727526382, now seen corresponding path program 1 times [2023-11-17 15:10:45,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:45,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309430619] [2023-11-17 15:10:45,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:45,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:45,180 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:45,205 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:45,205 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:45,205 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:10:45,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:10:45,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:10:45,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:10:45,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:10:45,207 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:10:45,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 15:10:45,207 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:10:45,208 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:45,208 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-17 15:10:45,232 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:45,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 246 transitions, 532 flow [2023-11-17 15:10:45,266 INFO L124 PetriNetUnfolderBase]: 21/309 cut-off events. [2023-11-17 15:10:45,266 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:10:45,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 309 events. 21/309 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 955 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 266. Up to 12 conditions per place. [2023-11-17 15:10:45,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 246 transitions, 532 flow [2023-11-17 15:10:45,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 246 transitions, 532 flow [2023-11-17 15:10:45,271 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:45,271 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 246 transitions, 532 flow [2023-11-17 15:10:45,273 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 246 transitions, 532 flow [2023-11-17 15:10:45,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 246 transitions, 532 flow [2023-11-17 15:10:45,392 INFO L124 PetriNetUnfolderBase]: 21/309 cut-off events. [2023-11-17 15:10:45,392 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-11-17 15:10:45,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 309 events. 21/309 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 955 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 266. Up to 12 conditions per place. [2023-11-17 15:10:45,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 42000 [2023-11-17 15:10:49,008 INFO L134 LiptonReduction]: Checked pairs total: 45915 [2023-11-17 15:10:49,009 INFO L136 LiptonReduction]: Total number of compositions: 259 [2023-11-17 15:10:49,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:10:49,010 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;@3d62d3f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:10:49,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:10:49,011 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:10:49,011 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:10:49,011 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:10:49,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:49,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:10:49,011 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:10:49,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash 61759073, now seen corresponding path program 1 times [2023-11-17 15:10:49,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:49,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728882061] [2023-11-17 15:10:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:49,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:49,025 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 15:10:49,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:49,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728882061] [2023-11-17 15:10:49,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728882061] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:49,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:49,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:10:49,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149546481] [2023-11-17 15:10:49,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:49,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:49,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:49,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:49,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:49,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 505 [2023-11-17 15:10:49,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 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 15:10:49,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:49,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 505 [2023-11-17 15:10:49,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:54,568 INFO L124 PetriNetUnfolderBase]: 71032/88015 cut-off events. [2023-11-17 15:10:54,569 INFO L125 PetriNetUnfolderBase]: For 19422/19422 co-relation queries the response was YES. [2023-11-17 15:10:54,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183468 conditions, 88015 events. 71032/88015 cut-off events. For 19422/19422 co-relation queries the response was YES. Maximal size of possible extension queue 3775. Compared 466261 event pairs, 20746 based on Foata normal form. 0/63259 useless extension candidates. Maximal degree in co-relation 24101. Up to 83925 conditions per place. [2023-11-17 15:10:55,106 INFO L140 encePairwiseOnDemand]: 486/505 looper letters, 56 selfloop transitions, 6 changer transitions 0/65 dead transitions. [2023-11-17 15:10:55,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 65 transitions, 326 flow [2023-11-17 15:10:55,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 677 transitions. [2023-11-17 15:10:55,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44686468646864685 [2023-11-17 15:10:55,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 677 transitions. [2023-11-17 15:10:55,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 677 transitions. [2023-11-17 15:10:55,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:55,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 677 transitions. [2023-11-17 15:10:55,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 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 15:10:55,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 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 15:10:55,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 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 15:10:55,112 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 136 flow. Second operand 3 states and 677 transitions. [2023-11-17 15:10:55,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 65 transitions, 326 flow [2023-11-17 15:10:55,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 65 transitions, 302 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-11-17 15:10:55,120 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 156 flow [2023-11-17 15:10:55,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2023-11-17 15:10:55,120 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-11-17 15:10:55,120 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 156 flow [2023-11-17 15:10:55,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.33333333333334) internal successors, (598), 3 states have internal predecessors, (598), 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 15:10:55,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:55,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:55,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 15:10:55,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:10:55,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:55,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1923280281, now seen corresponding path program 1 times [2023-11-17 15:10:55,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:55,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874490201] [2023-11-17 15:10:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:55,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:10:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 15:10:55,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:10:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874490201] [2023-11-17 15:10:55,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874490201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:10:55,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:10:55,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:10:55,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789655617] [2023-11-17 15:10:55,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:10:55,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:10:55,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:10:55,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:10:55,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:10:55,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 505 [2023-11-17 15:10:55,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 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 15:10:55,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:10:55,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 505 [2023-11-17 15:10:55,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:10:58,154 INFO L124 PetriNetUnfolderBase]: 33986/43218 cut-off events. [2023-11-17 15:10:58,156 INFO L125 PetriNetUnfolderBase]: For 14978/14978 co-relation queries the response was YES. [2023-11-17 15:10:58,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95884 conditions, 43218 events. 33986/43218 cut-off events. For 14978/14978 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 215553 event pairs, 24116 based on Foata normal form. 6328/48880 useless extension candidates. Maximal degree in co-relation 34110. Up to 41798 conditions per place. [2023-11-17 15:10:58,408 INFO L140 encePairwiseOnDemand]: 499/505 looper letters, 36 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-11-17 15:10:58,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 210 flow [2023-11-17 15:10:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:10:58,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:10:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2023-11-17 15:10:58,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4165016501650165 [2023-11-17 15:10:58,410 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2023-11-17 15:10:58,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2023-11-17 15:10:58,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:10:58,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2023-11-17 15:10:58,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 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 15:10:58,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 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 15:10:58,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 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 15:10:58,415 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 156 flow. Second operand 3 states and 631 transitions. [2023-11-17 15:10:58,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 210 flow [2023-11-17 15:10:58,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 40 transitions, 204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:10:58,433 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 132 flow [2023-11-17 15:10:58,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-17 15:10:58,435 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -2 predicate places. [2023-11-17 15:10:58,435 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 132 flow [2023-11-17 15:10:58,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 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 15:10:58,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:10:58,435 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:10:58,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 15:10:58,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:10:58,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:10:58,436 INFO L85 PathProgramCache]: Analyzing trace with hash -701761992, now seen corresponding path program 1 times [2023-11-17 15:10:58,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:10:58,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893117860] [2023-11-17 15:10:58,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:10:58,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:10:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:58,451 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:10:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:10:58,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:10:58,466 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:10:58,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-17 15:10:58,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-11-17 15:10:58,466 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-11-17 15:10:58,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-11-17 15:10:58,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-11-17 15:10:58,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-11-17 15:10:58,467 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-11-17 15:10:58,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 15:10:58,467 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:10:58,467 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:10:58,467 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-17 15:10:58,494 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-17 15:10:58,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 289 transitions, 632 flow [2023-11-17 15:10:58,530 INFO L124 PetriNetUnfolderBase]: 25/365 cut-off events. [2023-11-17 15:10:58,530 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:10:58,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 365 events. 25/365 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1206 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 328. Up to 14 conditions per place. [2023-11-17 15:10:58,534 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 289 transitions, 632 flow [2023-11-17 15:10:58,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 289 transitions, 632 flow [2023-11-17 15:10:58,536 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:10:58,536 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 283 places, 289 transitions, 632 flow [2023-11-17 15:10:58,537 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 283 places, 289 transitions, 632 flow [2023-11-17 15:10:58,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 289 transitions, 632 flow [2023-11-17 15:10:58,571 INFO L124 PetriNetUnfolderBase]: 25/365 cut-off events. [2023-11-17 15:10:58,572 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-11-17 15:10:58,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 365 events. 25/365 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1206 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 328. Up to 14 conditions per place. [2023-11-17 15:10:58,587 INFO L119 LiptonReduction]: Number of co-enabled transitions 61236 [2023-11-17 15:11:02,972 INFO L134 LiptonReduction]: Checked pairs total: 71898 [2023-11-17 15:11:02,972 INFO L136 LiptonReduction]: Total number of compositions: 316 [2023-11-17 15:11:02,974 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:11:02,974 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;@3d62d3f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:11:02,974 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-17 15:11:02,975 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:11:02,975 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-11-17 15:11:02,975 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:11:02,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:11:02,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:11:02,976 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-11-17 15:11:02,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:11:02,976 INFO L85 PathProgramCache]: Analyzing trace with hash 81668769, now seen corresponding path program 1 times [2023-11-17 15:11:02,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:11:02,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107422906] [2023-11-17 15:11:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:11:02,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:11:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:11:02,997 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 15:11:02,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:11:02,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107422906] [2023-11-17 15:11:02,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107422906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:11:02,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:11:02,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:11:02,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149662451] [2023-11-17 15:11:02,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:11:02,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:11:02,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:11:02,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:11:02,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:11:02,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 605 [2023-11-17 15:11:02,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 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 15:11:02,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:11:02,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 605 [2023-11-17 15:11:03,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand