/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/weaver/popl20-more-buffer-series2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:18:43,836 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:18:43,918 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 16:18:43,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:18:43,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:18:43,942 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:18:43,943 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:18:43,943 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:18:43,943 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:18:43,944 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:18:43,944 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:18:43,944 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:18:43,945 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:18:43,945 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:18:43,945 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:18:43,945 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:18:43,946 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:18:43,946 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:18:43,946 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:18:43,947 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:18:43,947 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:18:43,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:18:43,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:18:43,948 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:18:43,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:18:43,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:18:43,949 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:18:43,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:18:43,950 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:18:43,950 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:18:43,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:18:43,951 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:18:43,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:18:44,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:18:44,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:18:44,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:18:44,170 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:18:44,176 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:18:44,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-11-17 16:18:45,315 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:18:45,515 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:18:45,516 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c [2023-11-17 16:18:45,526 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc8e9da6/8b33485309864b2399dfb3866452483e/FLAGb9a7c0331 [2023-11-17 16:18:45,542 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efc8e9da6/8b33485309864b2399dfb3866452483e [2023-11-17 16:18:45,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:18:45,546 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:18:45,549 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:18:45,549 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:18:45,553 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:18:45,554 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,554 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45, skipping insertion in model container [2023-11-17 16:18:45,555 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,590 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:18:45,748 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c[4284,4297] [2023-11-17 16:18:45,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:18:45,764 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:18:45,789 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-buffer-series2.wvr.c[4284,4297] [2023-11-17 16:18:45,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:18:45,800 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:18:45,801 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:18:45,807 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:18:45,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45 WrapperNode [2023-11-17 16:18:45,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:18:45,808 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:18:45,808 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:18:45,808 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:18:45,814 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,852 INFO L138 Inliner]: procedures = 27, calls = 83, calls flagged for inlining = 22, calls inlined = 28, statements flattened = 360 [2023-11-17 16:18:45,852 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:18:45,853 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:18:45,853 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:18:45,853 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:18:45,860 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,877 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,884 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,885 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,889 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:18:45,890 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:18:45,890 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:18:45,890 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:18:45,891 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (1/1) ... [2023-11-17 16:18:45,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:18:45,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:18:45,925 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 16:18:45,927 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 16:18:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:18:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:18:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:18:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:18:45,946 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:18:45,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:18:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:18:45,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:18:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:18:45,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:18:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 16:18:45,947 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 16:18:45,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:18:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:18:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:18:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:18:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:18:45,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:18:45,948 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:18:45,950 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 16:18:46,070 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:18:46,072 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:18:46,568 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:18:46,791 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:18:46,791 INFO L307 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-17 16:18:46,793 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:18:46 BoogieIcfgContainer [2023-11-17 16:18:46,793 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:18:46,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:18:46,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:18:46,800 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:18:46,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:18:45" (1/3) ... [2023-11-17 16:18:46,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bae4964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:18:46, skipping insertion in model container [2023-11-17 16:18:46,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:18:45" (2/3) ... [2023-11-17 16:18:46,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bae4964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:18:46, skipping insertion in model container [2023-11-17 16:18:46,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:18:46" (3/3) ... [2023-11-17 16:18:46,803 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2023-11-17 16:18:46,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:18:46,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:18:46,819 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:18:46,897 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 16:18:46,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 276 transitions, 580 flow [2023-11-17 16:18:47,069 INFO L124 PetriNetUnfolderBase]: 22/272 cut-off events. [2023-11-17 16:18:47,069 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:18:47,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 272 events. 22/272 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 138 event pairs, 0 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 232. Up to 2 conditions per place. [2023-11-17 16:18:47,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 276 transitions, 580 flow [2023-11-17 16:18:47,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 259 transitions, 542 flow [2023-11-17 16:18:47,089 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:18:47,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 250 places, 259 transitions, 542 flow [2023-11-17 16:18:47,108 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 250 places, 259 transitions, 542 flow [2023-11-17 16:18:47,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 250 places, 259 transitions, 542 flow [2023-11-17 16:18:47,165 INFO L124 PetriNetUnfolderBase]: 22/259 cut-off events. [2023-11-17 16:18:47,165 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:18:47,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 259 events. 22/259 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 136 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 232. Up to 2 conditions per place. [2023-11-17 16:18:47,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 2160 [2023-11-17 16:18:55,740 INFO L134 LiptonReduction]: Checked pairs total: 3267 [2023-11-17 16:18:55,740 INFO L136 LiptonReduction]: Total number of compositions: 265 [2023-11-17 16:18:55,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:18:55,764 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;@36f85db0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:18:55,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 16:18:55,775 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:18:55,775 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2023-11-17 16:18:55,775 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 16:18:55,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:55,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:55,776 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:55,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:55,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1198912214, now seen corresponding path program 1 times [2023-11-17 16:18:55,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:55,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230685969] [2023-11-17 16:18:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:56,177 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 16:18:56,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:56,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230685969] [2023-11-17 16:18:56,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230685969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:56,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:56,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:18:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609339902] [2023-11-17 16:18:56,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:56,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:18:56,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:18:56,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:18:56,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 541 [2023-11-17 16:18:56,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 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 16:18:56,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:56,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 541 [2023-11-17 16:18:56,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:56,584 INFO L124 PetriNetUnfolderBase]: 2056/2833 cut-off events. [2023-11-17 16:18:56,584 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-11-17 16:18:56,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5675 conditions, 2833 events. 2056/2833 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10697 event pairs, 624 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 4278. Up to 1506 conditions per place. [2023-11-17 16:18:56,603 INFO L140 encePairwiseOnDemand]: 537/541 looper letters, 53 selfloop transitions, 3 changer transitions 1/59 dead transitions. [2023-11-17 16:18:56,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 271 flow [2023-11-17 16:18:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:18:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:18:56,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 796 transitions. [2023-11-17 16:18:56,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4904497843499692 [2023-11-17 16:18:56,624 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 796 transitions. [2023-11-17 16:18:56,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 796 transitions. [2023-11-17 16:18:56,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:56,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 796 transitions. [2023-11-17 16:18:56,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 265.3333333333333) internal successors, (796), 3 states have internal predecessors, (796), 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 16:18:56,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 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 16:18:56,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 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 16:18:56,645 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 98 flow. Second operand 3 states and 796 transitions. [2023-11-17 16:18:56,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 271 flow [2023-11-17 16:18:56,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 59 transitions, 245 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 16:18:56,656 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 101 flow [2023-11-17 16:18:56,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-11-17 16:18:56,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -5 predicate places. [2023-11-17 16:18:56,663 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 101 flow [2023-11-17 16:18:56,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 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 16:18:56,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:56,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:56,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:18:56,665 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:56,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:56,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1422026166, now seen corresponding path program 1 times [2023-11-17 16:18:56,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:56,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836293522] [2023-11-17 16:18:56,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:56,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:56,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:18:56,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:56,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836293522] [2023-11-17 16:18:56,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836293522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:56,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:56,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:18:56,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991250299] [2023-11-17 16:18:56,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:56,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:18:56,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:18:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:18:56,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 541 [2023-11-17 16:18:56,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 101 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 16:18:56,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:56,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 541 [2023-11-17 16:18:56,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:57,294 INFO L124 PetriNetUnfolderBase]: 3112/4216 cut-off events. [2023-11-17 16:18:57,294 INFO L125 PetriNetUnfolderBase]: For 571/571 co-relation queries the response was YES. [2023-11-17 16:18:57,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9178 conditions, 4216 events. 3112/4216 cut-off events. For 571/571 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16784 event pairs, 1146 based on Foata normal form. 148/3753 useless extension candidates. Maximal degree in co-relation 3962. Up to 2434 conditions per place. [2023-11-17 16:18:57,314 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 62 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-17 16:18:57,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 65 transitions, 295 flow [2023-11-17 16:18:57,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:18:57,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:18:57,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 788 transitions. [2023-11-17 16:18:57,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48552064078866297 [2023-11-17 16:18:57,317 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 788 transitions. [2023-11-17 16:18:57,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 788 transitions. [2023-11-17 16:18:57,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:57,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 788 transitions. [2023-11-17 16:18:57,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.6666666666667) internal successors, (788), 3 states have internal predecessors, (788), 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 16:18:57,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 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 16:18:57,323 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 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 16:18:57,323 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 101 flow. Second operand 3 states and 788 transitions. [2023-11-17 16:18:57,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 65 transitions, 295 flow [2023-11-17 16:18:57,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 291 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:57,326 INFO L231 Difference]: Finished difference. Result has 40 places, 40 transitions, 112 flow [2023-11-17 16:18:57,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=40, PETRI_TRANSITIONS=40} [2023-11-17 16:18:57,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2023-11-17 16:18:57,327 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 40 transitions, 112 flow [2023-11-17 16:18:57,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 16:18:57,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:57,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:57,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:18:57,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:57,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:57,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1652463071, now seen corresponding path program 1 times [2023-11-17 16:18:57,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843104359] [2023-11-17 16:18:57,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:57,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:57,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:57,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:18:57,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:57,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843104359] [2023-11-17 16:18:57,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843104359] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:57,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:57,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:18:57,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244158949] [2023-11-17 16:18:57,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:57,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:18:57,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:57,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:18:57,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:18:57,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 541 [2023-11-17 16:18:57,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 40 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 16:18:57,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:57,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 541 [2023-11-17 16:18:57,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:58,050 INFO L124 PetriNetUnfolderBase]: 4151/5675 cut-off events. [2023-11-17 16:18:58,050 INFO L125 PetriNetUnfolderBase]: For 1596/1596 co-relation queries the response was YES. [2023-11-17 16:18:58,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12844 conditions, 5675 events. 4151/5675 cut-off events. For 1596/1596 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24247 event pairs, 1628 based on Foata normal form. 184/5292 useless extension candidates. Maximal degree in co-relation 7153. Up to 3257 conditions per place. [2023-11-17 16:18:58,082 INFO L140 encePairwiseOnDemand]: 538/541 looper letters, 62 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-11-17 16:18:58,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 311 flow [2023-11-17 16:18:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:18:58,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:18:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 786 transitions. [2023-11-17 16:18:58,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48428835489833644 [2023-11-17 16:18:58,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 786 transitions. [2023-11-17 16:18:58,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 786 transitions. [2023-11-17 16:18:58,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:58,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 786 transitions. [2023-11-17 16:18:58,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 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 16:18:58,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 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 16:18:58,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 541.0) internal successors, (2164), 4 states have internal predecessors, (2164), 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 16:18:58,091 INFO L175 Difference]: Start difference. First operand has 40 places, 40 transitions, 112 flow. Second operand 3 states and 786 transitions. [2023-11-17 16:18:58,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 311 flow [2023-11-17 16:18:58,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:58,094 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 124 flow [2023-11-17 16:18:58,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2023-11-17 16:18:58,095 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2023-11-17 16:18:58,095 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 124 flow [2023-11-17 16:18:58,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 252.0) internal successors, (756), 3 states have internal predecessors, (756), 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 16:18:58,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:58,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:58,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:18:58,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:58,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:58,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1670752228, now seen corresponding path program 1 times [2023-11-17 16:18:58,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:58,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055346563] [2023-11-17 16:18:58,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:58,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:18:58,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:58,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055346563] [2023-11-17 16:18:58,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055346563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:58,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:58,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:18:58,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132751532] [2023-11-17 16:18:58,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:58,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:18:58,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:58,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:18:58,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:18:58,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 541 [2023-11-17 16:18:58,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 124 flow. Second operand has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 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 16:18:58,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:58,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 541 [2023-11-17 16:18:58,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:18:58,988 INFO L124 PetriNetUnfolderBase]: 5433/7649 cut-off events. [2023-11-17 16:18:58,989 INFO L125 PetriNetUnfolderBase]: For 2832/2832 co-relation queries the response was YES. [2023-11-17 16:18:58,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17965 conditions, 7649 events. 5433/7649 cut-off events. For 2832/2832 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 35222 event pairs, 4378 based on Foata normal form. 156/7745 useless extension candidates. Maximal degree in co-relation 11252. Up to 5250 conditions per place. [2023-11-17 16:18:59,021 INFO L140 encePairwiseOnDemand]: 533/541 looper letters, 70 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-11-17 16:18:59,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 79 transitions, 377 flow [2023-11-17 16:18:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:18:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:18:59,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1102 transitions. [2023-11-17 16:18:59,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40739371534195934 [2023-11-17 16:18:59,025 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1102 transitions. [2023-11-17 16:18:59,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1102 transitions. [2023-11-17 16:18:59,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:18:59,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1102 transitions. [2023-11-17 16:18:59,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.4) internal successors, (1102), 5 states have internal predecessors, (1102), 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 16:18:59,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 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 16:18:59,034 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 541.0) internal successors, (3246), 6 states have internal predecessors, (3246), 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 16:18:59,034 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 124 flow. Second operand 5 states and 1102 transitions. [2023-11-17 16:18:59,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 79 transitions, 377 flow [2023-11-17 16:18:59,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 79 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:18:59,038 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 174 flow [2023-11-17 16:18:59,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-11-17 16:18:59,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2023-11-17 16:18:59,039 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 174 flow [2023-11-17 16:18:59,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 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 16:18:59,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:18:59,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:18:59,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:18:59,040 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:18:59,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:18:59,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1253405627, now seen corresponding path program 1 times [2023-11-17 16:18:59,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:18:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078235097] [2023-11-17 16:18:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:18:59,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:18:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:18:59,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:18:59,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:18:59,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078235097] [2023-11-17 16:18:59,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078235097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:18:59,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:18:59,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:18:59,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001593281] [2023-11-17 16:18:59,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:18:59,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:18:59,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:18:59,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:18:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:18:59,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 541 [2023-11-17 16:18:59,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 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 16:18:59,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:18:59,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 541 [2023-11-17 16:18:59,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:00,188 INFO L124 PetriNetUnfolderBase]: 7695/11006 cut-off events. [2023-11-17 16:19:00,188 INFO L125 PetriNetUnfolderBase]: For 4076/4076 co-relation queries the response was YES. [2023-11-17 16:19:00,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25168 conditions, 11006 events. 7695/11006 cut-off events. For 4076/4076 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 55591 event pairs, 6450 based on Foata normal form. 306/11273 useless extension candidates. Maximal degree in co-relation 18198. Up to 7424 conditions per place. [2023-11-17 16:19:00,233 INFO L140 encePairwiseOnDemand]: 537/541 looper letters, 72 selfloop transitions, 5 changer transitions 2/81 dead transitions. [2023-11-17 16:19:00,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 81 transitions, 440 flow [2023-11-17 16:19:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:19:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:19:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 890 transitions. [2023-11-17 16:19:00,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411275415896488 [2023-11-17 16:19:00,236 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 890 transitions. [2023-11-17 16:19:00,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 890 transitions. [2023-11-17 16:19:00,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:00,237 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 890 transitions. [2023-11-17 16:19:00,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 222.5) internal successors, (890), 4 states have internal predecessors, (890), 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 16:19:00,242 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 541.0) internal successors, (2705), 5 states have internal predecessors, (2705), 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 16:19:00,243 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 541.0) internal successors, (2705), 5 states have internal predecessors, (2705), 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 16:19:00,243 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 174 flow. Second operand 4 states and 890 transitions. [2023-11-17 16:19:00,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 81 transitions, 440 flow [2023-11-17 16:19:00,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 81 transitions, 436 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:19:00,248 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 200 flow [2023-11-17 16:19:00,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2023-11-17 16:19:00,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2023-11-17 16:19:00,249 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 200 flow [2023-11-17 16:19:00,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 213.5) internal successors, (854), 4 states have internal predecessors, (854), 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 16:19:00,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:00,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:00,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:19:00,250 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:00,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:00,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1121181129, now seen corresponding path program 1 times [2023-11-17 16:19:00,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:00,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633006649] [2023-11-17 16:19:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:00,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:00,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:00,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633006649] [2023-11-17 16:19:00,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633006649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:00,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:00,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:19:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856516436] [2023-11-17 16:19:00,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:00,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:19:00,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:19:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:19:00,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 541 [2023-11-17 16:19:00,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 200 flow. Second operand has 6 states, 6 states have (on average 199.33333333333334) internal successors, (1196), 6 states have internal predecessors, (1196), 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 16:19:00,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:00,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 541 [2023-11-17 16:19:00,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:02,178 INFO L124 PetriNetUnfolderBase]: 13213/18670 cut-off events. [2023-11-17 16:19:02,178 INFO L125 PetriNetUnfolderBase]: For 5655/5655 co-relation queries the response was YES. [2023-11-17 16:19:02,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42653 conditions, 18670 events. 13213/18670 cut-off events. For 5655/5655 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 100822 event pairs, 5320 based on Foata normal form. 248/18910 useless extension candidates. Maximal degree in co-relation 29651. Up to 6719 conditions per place. [2023-11-17 16:19:02,268 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 115 selfloop transitions, 10 changer transitions 0/125 dead transitions. [2023-11-17 16:19:02,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 125 transitions, 670 flow [2023-11-17 16:19:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:19:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:19:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1273 transitions. [2023-11-17 16:19:02,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39217498459642636 [2023-11-17 16:19:02,272 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1273 transitions. [2023-11-17 16:19:02,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1273 transitions. [2023-11-17 16:19:02,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:02,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1273 transitions. [2023-11-17 16:19:02,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 212.16666666666666) internal successors, (1273), 6 states have internal predecessors, (1273), 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 16:19:02,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:02,280 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:02,280 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 200 flow. Second operand 6 states and 1273 transitions. [2023-11-17 16:19:02,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 125 transitions, 670 flow [2023-11-17 16:19:02,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 125 transitions, 660 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 16:19:02,291 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 236 flow [2023-11-17 16:19:02,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-11-17 16:19:02,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-11-17 16:19:02,293 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 236 flow [2023-11-17 16:19:02,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.33333333333334) internal successors, (1196), 6 states have internal predecessors, (1196), 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 16:19:02,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:02,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:02,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:19:02,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:02,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:02,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1892078204, now seen corresponding path program 1 times [2023-11-17 16:19:02,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:02,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577643014] [2023-11-17 16:19:02,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:02,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:19:02,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:02,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577643014] [2023-11-17 16:19:02,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577643014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:02,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:02,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:19:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038096387] [2023-11-17 16:19:02,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:19:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:19:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:19:02,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 541 [2023-11-17 16:19:02,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 236 flow. Second operand has 6 states, 6 states have (on average 199.33333333333334) internal successors, (1196), 6 states have internal predecessors, (1196), 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 16:19:02,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:02,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 541 [2023-11-17 16:19:02,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:04,162 INFO L124 PetriNetUnfolderBase]: 11061/15744 cut-off events. [2023-11-17 16:19:04,162 INFO L125 PetriNetUnfolderBase]: For 5855/5855 co-relation queries the response was YES. [2023-11-17 16:19:04,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36992 conditions, 15744 events. 11061/15744 cut-off events. For 5855/5855 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 84220 event pairs, 5298 based on Foata normal form. 192/15932 useless extension candidates. Maximal degree in co-relation 26241. Up to 7175 conditions per place. [2023-11-17 16:19:04,212 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 67 selfloop transitions, 7 changer transitions 38/112 dead transitions. [2023-11-17 16:19:04,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 112 transitions, 620 flow [2023-11-17 16:19:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:19:04,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:19:04,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1264 transitions. [2023-11-17 16:19:04,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894023413431916 [2023-11-17 16:19:04,216 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1264 transitions. [2023-11-17 16:19:04,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1264 transitions. [2023-11-17 16:19:04,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:04,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1264 transitions. [2023-11-17 16:19:04,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 210.66666666666666) internal successors, (1264), 6 states have internal predecessors, (1264), 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 16:19:04,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:04,224 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:04,224 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 236 flow. Second operand 6 states and 1264 transitions. [2023-11-17 16:19:04,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 112 transitions, 620 flow [2023-11-17 16:19:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 112 transitions, 610 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 16:19:04,231 INFO L231 Difference]: Finished difference. Result has 62 places, 49 transitions, 221 flow [2023-11-17 16:19:04,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=62, PETRI_TRANSITIONS=49} [2023-11-17 16:19:04,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2023-11-17 16:19:04,231 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 49 transitions, 221 flow [2023-11-17 16:19:04,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.33333333333334) internal successors, (1196), 6 states have internal predecessors, (1196), 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 16:19:04,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:04,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:04,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:19:04,233 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:04,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash -309868943, now seen corresponding path program 1 times [2023-11-17 16:19:04,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:04,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570657676] [2023-11-17 16:19:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:19:04,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:04,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570657676] [2023-11-17 16:19:04,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570657676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:04,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:04,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:19:04,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913246240] [2023-11-17 16:19:04,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:04,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:19:04,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:19:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:19:04,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 541 [2023-11-17 16:19:04,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 49 transitions, 221 flow. Second operand has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 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 16:19:04,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:04,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 541 [2023-11-17 16:19:04,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:05,450 INFO L124 PetriNetUnfolderBase]: 6113/8458 cut-off events. [2023-11-17 16:19:05,450 INFO L125 PetriNetUnfolderBase]: For 4514/4514 co-relation queries the response was YES. [2023-11-17 16:19:05,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21421 conditions, 8458 events. 6113/8458 cut-off events. For 4514/4514 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 38779 event pairs, 1120 based on Foata normal form. 496/8950 useless extension candidates. Maximal degree in co-relation 17388. Up to 5246 conditions per place. [2023-11-17 16:19:05,489 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 75 selfloop transitions, 6 changer transitions 4/85 dead transitions. [2023-11-17 16:19:05,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 505 flow [2023-11-17 16:19:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:19:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:19:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1236 transitions. [2023-11-17 16:19:05,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3807763401109057 [2023-11-17 16:19:05,494 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1236 transitions. [2023-11-17 16:19:05,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1236 transitions. [2023-11-17 16:19:05,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:05,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1236 transitions. [2023-11-17 16:19:05,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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 16:19:05,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:05,503 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:05,503 INFO L175 Difference]: Start difference. First operand has 62 places, 49 transitions, 221 flow. Second operand 6 states and 1236 transitions. [2023-11-17 16:19:05,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 505 flow [2023-11-17 16:19:05,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 484 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-17 16:19:05,511 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 192 flow [2023-11-17 16:19:05,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-11-17 16:19:05,514 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2023-11-17 16:19:05,516 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 192 flow [2023-11-17 16:19:05,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 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 16:19:05,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:05,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:05,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 16:19:05,518 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:05,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:05,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1014263168, now seen corresponding path program 1 times [2023-11-17 16:19:05,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:05,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171994015] [2023-11-17 16:19:05,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:05,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:19:05,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:05,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171994015] [2023-11-17 16:19:05,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171994015] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:05,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:05,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:19:05,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771192076] [2023-11-17 16:19:05,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:05,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:19:05,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:05,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:19:05,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:19:05,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 541 [2023-11-17 16:19:05,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 192 flow. Second operand has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 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 16:19:05,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:05,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 541 [2023-11-17 16:19:05,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:06,426 INFO L124 PetriNetUnfolderBase]: 3784/5147 cut-off events. [2023-11-17 16:19:06,426 INFO L125 PetriNetUnfolderBase]: For 3798/3798 co-relation queries the response was YES. [2023-11-17 16:19:06,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13637 conditions, 5147 events. 3784/5147 cut-off events. For 3798/3798 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 21528 event pairs, 672 based on Foata normal form. 376/5521 useless extension candidates. Maximal degree in co-relation 13608. Up to 2540 conditions per place. [2023-11-17 16:19:06,446 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 75 selfloop transitions, 5 changer transitions 1/81 dead transitions. [2023-11-17 16:19:06,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 476 flow [2023-11-17 16:19:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:19:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:19:06,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1236 transitions. [2023-11-17 16:19:06,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3807763401109057 [2023-11-17 16:19:06,450 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1236 transitions. [2023-11-17 16:19:06,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1236 transitions. [2023-11-17 16:19:06,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:06,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1236 transitions. [2023-11-17 16:19:06,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 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 16:19:06,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:06,458 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:06,458 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 192 flow. Second operand 6 states and 1236 transitions. [2023-11-17 16:19:06,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 476 flow [2023-11-17 16:19:06,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 437 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-17 16:19:06,462 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 172 flow [2023-11-17 16:19:06,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2023-11-17 16:19:06,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2023-11-17 16:19:06,463 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 172 flow [2023-11-17 16:19:06,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 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 16:19:06,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:06,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:06,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 16:19:06,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:06,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:06,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2071093859, now seen corresponding path program 1 times [2023-11-17 16:19:06,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:06,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461217153] [2023-11-17 16:19:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:06,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:06,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:19:06,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:06,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461217153] [2023-11-17 16:19:06,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461217153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:06,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:06,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:19:06,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814478413] [2023-11-17 16:19:06,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:06,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:19:06,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:06,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:19:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:19:06,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 541 [2023-11-17 16:19:06,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 195.83333333333334) internal successors, (1175), 6 states have internal predecessors, (1175), 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 16:19:06,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:06,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 541 [2023-11-17 16:19:06,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:07,250 INFO L124 PetriNetUnfolderBase]: 3152/4226 cut-off events. [2023-11-17 16:19:07,250 INFO L125 PetriNetUnfolderBase]: For 3311/3311 co-relation queries the response was YES. [2023-11-17 16:19:07,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11721 conditions, 4226 events. 3152/4226 cut-off events. For 3311/3311 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15898 event pairs, 563 based on Foata normal form. 208/4433 useless extension candidates. Maximal degree in co-relation 11693. Up to 2526 conditions per place. [2023-11-17 16:19:07,267 INFO L140 encePairwiseOnDemand]: 534/541 looper letters, 89 selfloop transitions, 7 changer transitions 0/96 dead transitions. [2023-11-17 16:19:07,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 96 transitions, 542 flow [2023-11-17 16:19:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:19:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:19:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1416 transitions. [2023-11-17 16:19:07,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37391074729337204 [2023-11-17 16:19:07,272 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1416 transitions. [2023-11-17 16:19:07,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1416 transitions. [2023-11-17 16:19:07,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:07,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1416 transitions. [2023-11-17 16:19:07,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.28571428571428) internal successors, (1416), 7 states have internal predecessors, (1416), 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 16:19:07,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 541.0) internal successors, (4328), 8 states have internal predecessors, (4328), 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 16:19:07,281 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 541.0) internal successors, (4328), 8 states have internal predecessors, (4328), 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 16:19:07,281 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 172 flow. Second operand 7 states and 1416 transitions. [2023-11-17 16:19:07,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 96 transitions, 542 flow [2023-11-17 16:19:07,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 96 transitions, 513 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-11-17 16:19:07,285 INFO L231 Difference]: Finished difference. Result has 58 places, 47 transitions, 186 flow [2023-11-17 16:19:07,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=58, PETRI_TRANSITIONS=47} [2023-11-17 16:19:07,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2023-11-17 16:19:07,286 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 47 transitions, 186 flow [2023-11-17 16:19:07,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.83333333333334) internal successors, (1175), 6 states have internal predecessors, (1175), 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 16:19:07,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:07,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:07,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 16:19:07,287 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:07,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:07,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1012275603, now seen corresponding path program 2 times [2023-11-17 16:19:07,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577518944] [2023-11-17 16:19:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:07,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 16:19:07,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:07,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577518944] [2023-11-17 16:19:07,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577518944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:07,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:07,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:19:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441785873] [2023-11-17 16:19:07,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:07,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:19:07,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:19:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 16:19:07,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 541 [2023-11-17 16:19:07,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 47 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 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 16:19:07,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:07,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 541 [2023-11-17 16:19:07,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:08,243 INFO L124 PetriNetUnfolderBase]: 4670/6207 cut-off events. [2023-11-17 16:19:08,244 INFO L125 PetriNetUnfolderBase]: For 4630/4630 co-relation queries the response was YES. [2023-11-17 16:19:08,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18178 conditions, 6207 events. 4670/6207 cut-off events. For 4630/4630 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 24823 event pairs, 1011 based on Foata normal form. 150/6356 useless extension candidates. Maximal degree in co-relation 18150. Up to 2355 conditions per place. [2023-11-17 16:19:08,282 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 97 selfloop transitions, 13 changer transitions 0/111 dead transitions. [2023-11-17 16:19:08,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 111 transitions, 626 flow [2023-11-17 16:19:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:19:08,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:19:08,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1535 transitions. [2023-11-17 16:19:08,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728897104128158 [2023-11-17 16:19:08,288 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1535 transitions. [2023-11-17 16:19:08,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1535 transitions. [2023-11-17 16:19:08,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:08,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1535 transitions. [2023-11-17 16:19:08,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 255.83333333333334) internal successors, (1535), 6 states have internal predecessors, (1535), 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 16:19:08,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:08,297 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:08,297 INFO L175 Difference]: Start difference. First operand has 58 places, 47 transitions, 186 flow. Second operand 6 states and 1535 transitions. [2023-11-17 16:19:08,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 111 transitions, 626 flow [2023-11-17 16:19:08,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 111 transitions, 614 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-11-17 16:19:08,305 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 280 flow [2023-11-17 16:19:08,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2023-11-17 16:19:08,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2023-11-17 16:19:08,306 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 280 flow [2023-11-17 16:19:08,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 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 16:19:08,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:08,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:08,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 16:19:08,307 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:08,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:08,308 INFO L85 PathProgramCache]: Analyzing trace with hash 109624972, now seen corresponding path program 1 times [2023-11-17 16:19:08,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:08,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094660141] [2023-11-17 16:19:08,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:08,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 16:19:08,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094660141] [2023-11-17 16:19:08,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094660141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:19:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962216025] [2023-11-17 16:19:08,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:08,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:19:08,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:19:08,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:19:08,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:19:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:08,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:19:08,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:19:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 16:19:08,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 16:19:08,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962216025] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:08,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 16:19:08,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-17 16:19:08,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602985866] [2023-11-17 16:19:08,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:08,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:19:08,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:08,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:19:08,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:19:08,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 541 [2023-11-17 16:19:08,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 55 transitions, 280 flow. Second operand has 5 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 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 16:19:08,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:08,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 541 [2023-11-17 16:19:08,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:10,065 INFO L124 PetriNetUnfolderBase]: 8200/11137 cut-off events. [2023-11-17 16:19:10,065 INFO L125 PetriNetUnfolderBase]: For 21359/21535 co-relation queries the response was YES. [2023-11-17 16:19:10,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37669 conditions, 11137 events. 8200/11137 cut-off events. For 21359/21535 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 53202 event pairs, 1653 based on Foata normal form. 316/11422 useless extension candidates. Maximal degree in co-relation 37637. Up to 4057 conditions per place. [2023-11-17 16:19:10,144 INFO L140 encePairwiseOnDemand]: 535/541 looper letters, 125 selfloop transitions, 11 changer transitions 0/141 dead transitions. [2023-11-17 16:19:10,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 141 transitions, 1021 flow [2023-11-17 16:19:10,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:19:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:19:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1537 transitions. [2023-11-17 16:19:10,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47350585335797907 [2023-11-17 16:19:10,149 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1537 transitions. [2023-11-17 16:19:10,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1537 transitions. [2023-11-17 16:19:10,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:10,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1537 transitions. [2023-11-17 16:19:10,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 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 16:19:10,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:10,157 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 541.0) internal successors, (3787), 7 states have internal predecessors, (3787), 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 16:19:10,157 INFO L175 Difference]: Start difference. First operand has 64 places, 55 transitions, 280 flow. Second operand 6 states and 1537 transitions. [2023-11-17 16:19:10,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 141 transitions, 1021 flow [2023-11-17 16:19:10,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 141 transitions, 993 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 16:19:10,197 INFO L231 Difference]: Finished difference. Result has 71 places, 63 transitions, 359 flow [2023-11-17 16:19:10,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=359, PETRI_PLACES=71, PETRI_TRANSITIONS=63} [2023-11-17 16:19:10,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2023-11-17 16:19:10,198 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 63 transitions, 359 flow [2023-11-17 16:19:10,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 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 16:19:10,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:10,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:10,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:19:10,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-17 16:19:10,405 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:10,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:10,405 INFO L85 PathProgramCache]: Analyzing trace with hash 104314252, now seen corresponding path program 2 times [2023-11-17 16:19:10,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:10,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435291116] [2023-11-17 16:19:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:10,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 16:19:10,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435291116] [2023-11-17 16:19:10,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435291116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:19:10,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:19:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:19:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756492577] [2023-11-17 16:19:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:19:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 16:19:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:19:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 16:19:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-17 16:19:10,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 541 [2023-11-17 16:19:10,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 63 transitions, 359 flow. Second operand has 6 states, 6 states have (on average 195.83333333333334) internal successors, (1175), 6 states have internal predecessors, (1175), 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 16:19:10,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:19:10,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 541 [2023-11-17 16:19:10,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:19:12,121 INFO L124 PetriNetUnfolderBase]: 10240/13631 cut-off events. [2023-11-17 16:19:12,122 INFO L125 PetriNetUnfolderBase]: For 36096/36096 co-relation queries the response was YES. [2023-11-17 16:19:12,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53631 conditions, 13631 events. 10240/13631 cut-off events. For 36096/36096 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 60691 event pairs, 2287 based on Foata normal form. 380/14010 useless extension candidates. Maximal degree in co-relation 53595. Up to 10183 conditions per place. [2023-11-17 16:19:12,178 INFO L140 encePairwiseOnDemand]: 534/541 looper letters, 140 selfloop transitions, 8 changer transitions 0/148 dead transitions. [2023-11-17 16:19:12,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 148 transitions, 1205 flow [2023-11-17 16:19:12,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:19:12,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:19:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1416 transitions. [2023-11-17 16:19:12,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37391074729337204 [2023-11-17 16:19:12,183 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1416 transitions. [2023-11-17 16:19:12,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1416 transitions. [2023-11-17 16:19:12,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:19:12,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1416 transitions. [2023-11-17 16:19:12,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 202.28571428571428) internal successors, (1416), 7 states have internal predecessors, (1416), 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 16:19:12,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 541.0) internal successors, (4328), 8 states have internal predecessors, (4328), 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 16:19:12,192 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 541.0) internal successors, (4328), 8 states have internal predecessors, (4328), 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 16:19:12,192 INFO L175 Difference]: Start difference. First operand has 71 places, 63 transitions, 359 flow. Second operand 7 states and 1416 transitions. [2023-11-17 16:19:12,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 148 transitions, 1205 flow [2023-11-17 16:19:12,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 148 transitions, 1202 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 16:19:12,245 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 404 flow [2023-11-17 16:19:12,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=404, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2023-11-17 16:19:12,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2023-11-17 16:19:12,246 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 404 flow [2023-11-17 16:19:12,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 195.83333333333334) internal successors, (1175), 6 states have internal predecessors, (1175), 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 16:19:12,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:19:12,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:19:12,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 16:19:12,247 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:19:12,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:19:12,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1709407834, now seen corresponding path program 1 times [2023-11-17 16:19:12,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:19:12,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233681513] [2023-11-17 16:19:12,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:12,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:19:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:19:15,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:19:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233681513] [2023-11-17 16:19:15,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233681513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:19:15,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331323457] [2023-11-17 16:19:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:19:15,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:19:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:19:15,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:19:15,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:19:15,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:19:15,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-17 16:19:15,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:19:16,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:19:16,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:19:16,729 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 16:19:16,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-17 16:19:17,280 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-17 16:19:17,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 30 [2023-11-17 16:19:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:19:17,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:19:17,935 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:19:17,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 234 treesize of output 406 [2023-11-17 16:19:18,018 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:19:18,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 188 [2023-11-17 16:21:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:37,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331323457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:37,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:37,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 34 [2023-11-17 16:21:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999756207] [2023-11-17 16:21:37,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:37,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 16:21:37,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 16:21:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1122, Unknown=1, NotChecked=0, Total=1260 [2023-11-17 16:21:37,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 541 [2023-11-17 16:21:37,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 404 flow. Second operand has 36 states, 36 states have (on average 148.63888888888889) internal successors, (5351), 36 states have internal predecessors, (5351), 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 16:21:37,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:37,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 541 [2023-11-17 16:21:37,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:22:01,175 INFO L124 PetriNetUnfolderBase]: 90946/120686 cut-off events. [2023-11-17 16:22:01,175 INFO L125 PetriNetUnfolderBase]: For 407022/407022 co-relation queries the response was YES. [2023-11-17 16:22:01,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505752 conditions, 120686 events. 90946/120686 cut-off events. For 407022/407022 co-relation queries the response was YES. Maximal size of possible extension queue 3504. Compared 723238 event pairs, 6306 based on Foata normal form. 19/120697 useless extension candidates. Maximal degree in co-relation 504531. Up to 22393 conditions per place. [2023-11-17 16:22:02,125 INFO L140 encePairwiseOnDemand]: 526/541 looper letters, 812 selfloop transitions, 362 changer transitions 10/1184 dead transitions. [2023-11-17 16:22:02,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 1184 transitions, 9382 flow [2023-11-17 16:22:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-17 16:22:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-11-17 16:22:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 8871 transitions. [2023-11-17 16:22:02,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29813476726600574 [2023-11-17 16:22:02,144 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 8871 transitions. [2023-11-17 16:22:02,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 8871 transitions. [2023-11-17 16:22:02,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:22:02,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 8871 transitions. [2023-11-17 16:22:02,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 161.29090909090908) internal successors, (8871), 55 states have internal predecessors, (8871), 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 16:22:02,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 541.0) internal successors, (30296), 56 states have internal predecessors, (30296), 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 16:22:02,200 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 541.0) internal successors, (30296), 56 states have internal predecessors, (30296), 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 16:22:02,201 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 404 flow. Second operand 55 states and 8871 transitions. [2023-11-17 16:22:02,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 1184 transitions, 9382 flow [2023-11-17 16:22:03,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 1184 transitions, 9278 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-11-17 16:22:03,587 INFO L231 Difference]: Finished difference. Result has 157 places, 454 transitions, 4845 flow [2023-11-17 16:22:03,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=541, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=4845, PETRI_PLACES=157, PETRI_TRANSITIONS=454} [2023-11-17 16:22:03,588 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2023-11-17 16:22:03,588 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 454 transitions, 4845 flow [2023-11-17 16:22:03,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 148.63888888888889) internal successors, (5351), 36 states have internal predecessors, (5351), 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 16:22:03,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:22:03,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:22:03,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:22:03,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:22:03,796 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 16:22:03,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:22:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2012676838, now seen corresponding path program 2 times [2023-11-17 16:22:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:22:03,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050970815] [2023-11-17 16:22:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:22:03,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:22:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:22:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:22:05,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:22:05,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050970815] [2023-11-17 16:22:05,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050970815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:22:05,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834234008] [2023-11-17 16:22:05,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:22:05,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:22:05,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:22:05,415 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:22:05,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:22:05,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:22:05,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:22:05,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-17 16:22:05,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:22:06,696 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-11-17 16:22:06,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 30 [2023-11-17 16:22:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:22:06,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:22:07,179 INFO L349 Elim1Store]: treesize reduction 19, result has 92.5 percent of original size [2023-11-17 16:22:07,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 250 [2023-11-17 16:22:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:22:10,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834234008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:22:10,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:22:10,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-11-17 16:22:10,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781026412] [2023-11-17 16:22:10,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:22:10,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:22:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:22:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:22:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:22:10,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 541 [2023-11-17 16:22:10,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 454 transitions, 4845 flow. Second operand has 30 states, 30 states have (on average 164.3) internal successors, (4929), 30 states have internal predecessors, (4929), 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 16:22:10,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:22:10,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 541 [2023-11-17 16:22:10,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand