/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 13:50:01,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 13:50:01,894 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-VariableLbe.epf [2023-08-24 13:50:01,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 13:50:01,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 13:50:01,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 13:50:01,931 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 13:50:01,936 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 13:50:01,937 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 13:50:01,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 13:50:01,940 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 13:50:01,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 13:50:01,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 13:50:01,942 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 13:50:01,942 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 13:50:01,943 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 13:50:01,943 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 13:50:01,943 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 13:50:01,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 13:50:01,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 13:50:01,944 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 13:50:01,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 13:50:01,945 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 13:50:01,945 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 13:50:01,945 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 13:50:01,945 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 13:50:01,946 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 13:50:01,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:50:01,946 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 13:50:01,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 13:50:01,947 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 13:50:01,947 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 13:50:01,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 13:50:01,948 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 13:50:01,948 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 13:50:01,948 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 13:50:02,219 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 13:50:02,236 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 13:50:02,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 13:50:02,240 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 13:50:02,240 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 13:50:02,241 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-24 13:50:03,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 13:50:03,705 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 13:50:03,705 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-symm.wvr.c [2023-08-24 13:50:03,715 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee826703e/eab695cade494f019af55aee026024c3/FLAG0908184eb [2023-08-24 13:50:03,733 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee826703e/eab695cade494f019af55aee026024c3 [2023-08-24 13:50:03,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 13:50:03,739 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 13:50:03,741 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 13:50:03,742 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 13:50:03,744 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 13:50:03,746 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:50:03" (1/1) ... [2023-08-24 13:50:03,747 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31f12aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:03, skipping insertion in model container [2023-08-24 13:50:03,747 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 01:50:03" (1/1) ... [2023-08-24 13:50:03,777 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 13:50:03,970 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/chl-node-symm.wvr.c[3305,3318] [2023-08-24 13:50:03,991 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:50:04,002 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 13:50:04,038 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/chl-node-symm.wvr.c[3305,3318] [2023-08-24 13:50:04,042 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 13:50:04,057 INFO L206 MainTranslator]: Completed translation [2023-08-24 13:50:04,058 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04 WrapperNode [2023-08-24 13:50:04,058 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 13:50:04,059 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 13:50:04,059 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 13:50:04,059 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 13:50:04,065 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,085 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,126 INFO L138 Inliner]: procedures = 26, calls = 50, calls flagged for inlining = 18, calls inlined = 24, statements flattened = 298 [2023-08-24 13:50:04,126 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 13:50:04,127 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 13:50:04,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 13:50:04,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 13:50:04,135 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,135 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,142 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,143 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,150 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,154 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,156 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,158 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,161 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 13:50:04,161 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 13:50:04,162 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 13:50:04,162 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 13:50:04,162 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (1/1) ... [2023-08-24 13:50:04,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 13:50:04,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 13:50:04,210 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) [2023-08-24 13:50:04,223 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 [2023-08-24 13:50:04,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 13:50:04,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 13:50:04,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 13:50:04,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 13:50:04,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 13:50:04,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 13:50:04,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 13:50:04,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 13:50:04,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 13:50:04,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 13:50:04,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 13:50:04,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 13:50:04,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 13:50:04,254 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 13:50:04,356 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 13:50:04,358 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 13:50:04,874 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 13:50:04,884 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 13:50:04,884 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 13:50:04,886 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:50:04 BoogieIcfgContainer [2023-08-24 13:50:04,887 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 13:50:04,889 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 13:50:04,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 13:50:04,891 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 13:50:04,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 01:50:03" (1/3) ... [2023-08-24 13:50:04,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c4c3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:50:04, skipping insertion in model container [2023-08-24 13:50:04,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 01:50:04" (2/3) ... [2023-08-24 13:50:04,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c4c3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 01:50:04, skipping insertion in model container [2023-08-24 13:50:04,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 01:50:04" (3/3) ... [2023-08-24 13:50:04,893 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2023-08-24 13:50:04,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 13:50:04,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 13:50:04,907 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 13:50:05,041 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 13:50:05,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 326 places, 347 transitions, 710 flow [2023-08-24 13:50:05,191 INFO L124 PetriNetUnfolderBase]: 28/345 cut-off events. [2023-08-24 13:50:05,191 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 13:50:05,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 345 events. 28/345 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 339 event pairs, 0 based on Foata normal form. 0/316 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2023-08-24 13:50:05,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 326 places, 347 transitions, 710 flow [2023-08-24 13:50:05,206 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 316 places, 337 transitions, 686 flow [2023-08-24 13:50:05,209 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 13:50:05,217 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 316 places, 337 transitions, 686 flow [2023-08-24 13:50:05,219 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 316 places, 337 transitions, 686 flow [2023-08-24 13:50:05,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 316 places, 337 transitions, 686 flow [2023-08-24 13:50:05,289 INFO L124 PetriNetUnfolderBase]: 28/337 cut-off events. [2023-08-24 13:50:05,289 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 13:50:05,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 337 events. 28/337 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 339 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 274. Up to 2 conditions per place. [2023-08-24 13:50:05,294 INFO L119 LiptonReduction]: Number of co-enabled transitions 6048 [2023-08-24 13:50:16,320 INFO L134 LiptonReduction]: Checked pairs total: 6619 [2023-08-24 13:50:16,320 INFO L136 LiptonReduction]: Total number of compositions: 398 [2023-08-24 13:50:16,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 13:50:16,340 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=LoopsAndPotentialCycles, 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;@71ab715e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 13:50:16,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 13:50:16,347 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 13:50:16,347 INFO L124 PetriNetUnfolderBase]: 6/25 cut-off events. [2023-08-24 13:50:16,347 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 13:50:16,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:16,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:50:16,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:16,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:16,353 INFO L85 PathProgramCache]: Analyzing trace with hash -523305402, now seen corresponding path program 1 times [2023-08-24 13:50:16,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:16,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967712944] [2023-08-24 13:50:16,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:16,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:50:16,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:16,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967712944] [2023-08-24 13:50:16,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967712944] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:16,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:16,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:50:16,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066066262] [2023-08-24 13:50:16,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:50:16,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:16,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:50:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:50:16,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 315 out of 745 [2023-08-24 13:50:16,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 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) [2023-08-24 13:50:16,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:16,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 315 of 745 [2023-08-24 13:50:16,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:16,809 INFO L124 PetriNetUnfolderBase]: 61/120 cut-off events. [2023-08-24 13:50:16,809 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-24 13:50:16,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 120 events. 61/120 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 287 event pairs, 33 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 220. Up to 91 conditions per place. [2023-08-24 13:50:16,814 INFO L140 encePairwiseOnDemand]: 741/745 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-24 13:50:16,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 31 transitions, 139 flow [2023-08-24 13:50:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:50:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:50:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 977 transitions. [2023-08-24 13:50:16,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43713646532438477 [2023-08-24 13:50:16,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 977 transitions. [2023-08-24 13:50:16,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 977 transitions. [2023-08-24 13:50:16,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:16,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 977 transitions. [2023-08-24 13:50:16,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 325.6666666666667) internal successors, (977), 3 states have internal predecessors, (977), 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) [2023-08-24 13:50:16,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 745.0) internal successors, (2980), 4 states have internal predecessors, (2980), 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) [2023-08-24 13:50:16,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 745.0) internal successors, (2980), 4 states have internal predecessors, (2980), 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) [2023-08-24 13:50:16,861 INFO L175 Difference]: Start difference. First operand has 27 places, 26 transitions, 64 flow. Second operand 3 states and 977 transitions. [2023-08-24 13:50:16,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 31 transitions, 139 flow [2023-08-24 13:50:16,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 13:50:16,866 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 74 flow [2023-08-24 13:50:16,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-24 13:50:16,871 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-24 13:50:16,872 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 74 flow [2023-08-24 13:50:16,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 321.0) internal successors, (963), 3 states have internal predecessors, (963), 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) [2023-08-24 13:50:16,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:16,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 13:50:16,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 13:50:16,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:16,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1830154706, now seen corresponding path program 1 times [2023-08-24 13:50:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990120440] [2023-08-24 13:50:16,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:16,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:17,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 13:50:17,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:17,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990120440] [2023-08-24 13:50:17,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990120440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:17,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:17,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 13:50:17,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952666777] [2023-08-24 13:50:17,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:17,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 13:50:17,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:17,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 13:50:17,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 13:50:17,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 745 [2023-08-24 13:50:17,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 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) [2023-08-24 13:50:17,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:17,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 745 [2023-08-24 13:50:17,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:17,184 INFO L124 PetriNetUnfolderBase]: 61/121 cut-off events. [2023-08-24 13:50:17,185 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 13:50:17,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 121 events. 61/121 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 281 event pairs, 45 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 183. Up to 121 conditions per place. [2023-08-24 13:50:17,186 INFO L140 encePairwiseOnDemand]: 742/745 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-24 13:50:17,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 132 flow [2023-08-24 13:50:17,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 13:50:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 13:50:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 922 transitions. [2023-08-24 13:50:17,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41252796420581656 [2023-08-24 13:50:17,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 922 transitions. [2023-08-24 13:50:17,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 922 transitions. [2023-08-24 13:50:17,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:17,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 922 transitions. [2023-08-24 13:50:17,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 307.3333333333333) internal successors, (922), 3 states have internal predecessors, (922), 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) [2023-08-24 13:50:17,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 745.0) internal successors, (2980), 4 states have internal predecessors, (2980), 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) [2023-08-24 13:50:17,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 745.0) internal successors, (2980), 4 states have internal predecessors, (2980), 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) [2023-08-24 13:50:17,197 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 74 flow. Second operand 3 states and 922 transitions. [2023-08-24 13:50:17,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 132 flow [2023-08-24 13:50:17,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 28 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 13:50:17,199 INFO L231 Difference]: Finished difference. Result has 28 places, 28 transitions, 80 flow [2023-08-24 13:50:17,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=28, PETRI_TRANSITIONS=28} [2023-08-24 13:50:17,200 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 1 predicate places. [2023-08-24 13:50:17,200 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 28 transitions, 80 flow [2023-08-24 13:50:17,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 304.3333333333333) internal successors, (913), 3 states have internal predecessors, (913), 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) [2023-08-24 13:50:17,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:17,202 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] [2023-08-24 13:50:17,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 13:50:17,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:17,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:17,206 INFO L85 PathProgramCache]: Analyzing trace with hash -823891966, now seen corresponding path program 1 times [2023-08-24 13:50:17,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:17,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691380144] [2023-08-24 13:50:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:17,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:17,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 13:50:17,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:17,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691380144] [2023-08-24 13:50:17,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691380144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:17,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:17,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:50:17,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056613814] [2023-08-24 13:50:17,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:17,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:50:17,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:17,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:50:17,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:50:17,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 745 [2023-08-24 13:50:17,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 28 transitions, 80 flow. Second operand has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2023-08-24 13:50:17,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:17,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 745 [2023-08-24 13:50:17,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:17,438 INFO L124 PetriNetUnfolderBase]: 61/122 cut-off events. [2023-08-24 13:50:17,439 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 13:50:17,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 122 events. 61/122 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 280 event pairs, 45 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 281. Up to 120 conditions per place. [2023-08-24 13:50:17,440 INFO L140 encePairwiseOnDemand]: 740/745 looper letters, 25 selfloop transitions, 4 changer transitions 0/29 dead transitions. [2023-08-24 13:50:17,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 29 transitions, 140 flow [2023-08-24 13:50:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:50:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:50:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1173 transitions. [2023-08-24 13:50:17,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39362416107382553 [2023-08-24 13:50:17,444 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1173 transitions. [2023-08-24 13:50:17,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1173 transitions. [2023-08-24 13:50:17,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:17,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1173 transitions. [2023-08-24 13:50:17,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 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) [2023-08-24 13:50:17,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 745.0) internal successors, (3725), 5 states have internal predecessors, (3725), 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) [2023-08-24 13:50:17,453 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 745.0) internal successors, (3725), 5 states have internal predecessors, (3725), 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) [2023-08-24 13:50:17,453 INFO L175 Difference]: Start difference. First operand has 28 places, 28 transitions, 80 flow. Second operand 4 states and 1173 transitions. [2023-08-24 13:50:17,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 29 transitions, 140 flow [2023-08-24 13:50:17,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 13:50:17,455 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 94 flow [2023-08-24 13:50:17,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-24 13:50:17,456 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2023-08-24 13:50:17,456 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 94 flow [2023-08-24 13:50:17,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2023-08-24 13:50:17,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:17,457 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] [2023-08-24 13:50:17,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 13:50:17,458 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:17,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash -470754890, now seen corresponding path program 1 times [2023-08-24 13:50:17,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:17,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485427750] [2023-08-24 13:50:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 13:50:17,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:17,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485427750] [2023-08-24 13:50:17,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485427750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:17,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:17,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:50:17,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982895211] [2023-08-24 13:50:17,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:17,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:50:17,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:50:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:50:17,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 745 [2023-08-24 13:50:17,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 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) [2023-08-24 13:50:17,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:17,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 745 [2023-08-24 13:50:17,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:17,640 INFO L124 PetriNetUnfolderBase]: 61/123 cut-off events. [2023-08-24 13:50:17,640 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-24 13:50:17,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 123 events. 61/123 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 282 event pairs, 45 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 281. Up to 122 conditions per place. [2023-08-24 13:50:17,641 INFO L140 encePairwiseOnDemand]: 741/745 looper letters, 27 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2023-08-24 13:50:17,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 156 flow [2023-08-24 13:50:17,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:50:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:50:17,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1180 transitions. [2023-08-24 13:50:17,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959731543624161 [2023-08-24 13:50:17,644 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1180 transitions. [2023-08-24 13:50:17,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1180 transitions. [2023-08-24 13:50:17,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:17,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1180 transitions. [2023-08-24 13:50:17,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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) [2023-08-24 13:50:17,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 745.0) internal successors, (3725), 5 states have internal predecessors, (3725), 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) [2023-08-24 13:50:17,655 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 745.0) internal successors, (3725), 5 states have internal predecessors, (3725), 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) [2023-08-24 13:50:17,656 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 94 flow. Second operand 4 states and 1180 transitions. [2023-08-24 13:50:17,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 156 flow [2023-08-24 13:50:17,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 13:50:17,658 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 107 flow [2023-08-24 13:50:17,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-24 13:50:17,660 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2023-08-24 13:50:17,660 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 107 flow [2023-08-24 13:50:17,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 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) [2023-08-24 13:50:17,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:17,661 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] [2023-08-24 13:50:17,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 13:50:17,661 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:17,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:17,662 INFO L85 PathProgramCache]: Analyzing trace with hash 80420496, now seen corresponding path program 1 times [2023-08-24 13:50:17,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:17,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048999449] [2023-08-24 13:50:17,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:17,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:17,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 13:50:17,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:17,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048999449] [2023-08-24 13:50:17,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048999449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:17,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:17,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 13:50:17,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207712628] [2023-08-24 13:50:17,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:17,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 13:50:17,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:17,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 13:50:17,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 13:50:17,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 745 [2023-08-24 13:50:17,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 107 flow. Second operand has 4 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 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) [2023-08-24 13:50:17,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:17,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 745 [2023-08-24 13:50:17,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:17,921 INFO L124 PetriNetUnfolderBase]: 61/124 cut-off events. [2023-08-24 13:50:17,921 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-24 13:50:17,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 124 events. 61/124 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 280 event pairs, 45 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 288. Up to 123 conditions per place. [2023-08-24 13:50:17,923 INFO L140 encePairwiseOnDemand]: 741/745 looper letters, 28 selfloop transitions, 3 changer transitions 0/31 dead transitions. [2023-08-24 13:50:17,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 171 flow [2023-08-24 13:50:17,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 13:50:17,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 13:50:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1180 transitions. [2023-08-24 13:50:17,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959731543624161 [2023-08-24 13:50:17,926 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1180 transitions. [2023-08-24 13:50:17,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1180 transitions. [2023-08-24 13:50:17,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:17,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1180 transitions. [2023-08-24 13:50:17,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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) [2023-08-24 13:50:17,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 745.0) internal successors, (3725), 5 states have internal predecessors, (3725), 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) [2023-08-24 13:50:17,937 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 745.0) internal successors, (3725), 5 states have internal predecessors, (3725), 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) [2023-08-24 13:50:17,937 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 107 flow. Second operand 4 states and 1180 transitions. [2023-08-24 13:50:17,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 171 flow [2023-08-24 13:50:17,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 165 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 13:50:17,940 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 115 flow [2023-08-24 13:50:17,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-24 13:50:17,942 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 9 predicate places. [2023-08-24 13:50:17,943 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 115 flow [2023-08-24 13:50:17,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 293.5) internal successors, (1174), 4 states have internal predecessors, (1174), 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) [2023-08-24 13:50:17,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:17,944 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] [2023-08-24 13:50:17,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 13:50:17,944 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:17,945 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:17,945 INFO L85 PathProgramCache]: Analyzing trace with hash -499724060, now seen corresponding path program 1 times [2023-08-24 13:50:17,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:17,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345322099] [2023-08-24 13:50:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:17,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:18,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:18,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345322099] [2023-08-24 13:50:18,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345322099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:18,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:18,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:18,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394546584] [2023-08-24 13:50:18,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:18,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:18,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:18,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:18,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:18,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 745 [2023-08-24 13:50:18,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 277.8333333333333) internal successors, (1667), 6 states have internal predecessors, (1667), 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) [2023-08-24 13:50:18,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:18,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 745 [2023-08-24 13:50:18,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:19,111 INFO L124 PetriNetUnfolderBase]: 75/178 cut-off events. [2023-08-24 13:50:19,111 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-24 13:50:19,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 178 events. 75/178 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 584 event pairs, 35 based on Foata normal form. 1/172 useless extension candidates. Maximal degree in co-relation 419. Up to 120 conditions per place. [2023-08-24 13:50:19,112 INFO L140 encePairwiseOnDemand]: 739/745 looper letters, 44 selfloop transitions, 3 changer transitions 7/54 dead transitions. [2023-08-24 13:50:19,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 54 transitions, 286 flow [2023-08-24 13:50:19,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:19,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:19,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1694 transitions. [2023-08-24 13:50:19,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3789709172259508 [2023-08-24 13:50:19,118 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1694 transitions. [2023-08-24 13:50:19,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1694 transitions. [2023-08-24 13:50:19,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:19,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1694 transitions. [2023-08-24 13:50:19,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.3333333333333) internal successors, (1694), 6 states have internal predecessors, (1694), 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) [2023-08-24 13:50:19,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:19,130 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:19,130 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 115 flow. Second operand 6 states and 1694 transitions. [2023-08-24 13:50:19,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 54 transitions, 286 flow [2023-08-24 13:50:19,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 54 transitions, 280 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 13:50:19,134 INFO L231 Difference]: Finished difference. Result has 43 places, 33 transitions, 133 flow [2023-08-24 13:50:19,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=133, PETRI_PLACES=43, PETRI_TRANSITIONS=33} [2023-08-24 13:50:19,136 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 16 predicate places. [2023-08-24 13:50:19,137 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 33 transitions, 133 flow [2023-08-24 13:50:19,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 277.8333333333333) internal successors, (1667), 6 states have internal predecessors, (1667), 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) [2023-08-24 13:50:19,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:19,139 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] [2023-08-24 13:50:19,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 13:50:19,139 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:19,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -239021920, now seen corresponding path program 2 times [2023-08-24 13:50:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:19,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774511134] [2023-08-24 13:50:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:19,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:19,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:19,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774511134] [2023-08-24 13:50:19,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774511134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:19,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:19,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:19,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540506830] [2023-08-24 13:50:19,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:19,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:19,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:19,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:19,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:19,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 745 [2023-08-24 13:50:19,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 133 flow. Second operand has 6 states, 6 states have (on average 277.8333333333333) internal successors, (1667), 6 states have internal predecessors, (1667), 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) [2023-08-24 13:50:19,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:19,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 745 [2023-08-24 13:50:19,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:20,007 INFO L124 PetriNetUnfolderBase]: 91/200 cut-off events. [2023-08-24 13:50:20,008 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 13:50:20,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590 conditions, 200 events. 91/200 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 685 event pairs, 24 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 572. Up to 103 conditions per place. [2023-08-24 13:50:20,009 INFO L140 encePairwiseOnDemand]: 738/745 looper letters, 43 selfloop transitions, 4 changer transitions 9/56 dead transitions. [2023-08-24 13:50:20,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 56 transitions, 324 flow [2023-08-24 13:50:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:20,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1693 transitions. [2023-08-24 13:50:20,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787472035794183 [2023-08-24 13:50:20,014 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1693 transitions. [2023-08-24 13:50:20,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1693 transitions. [2023-08-24 13:50:20,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:20,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1693 transitions. [2023-08-24 13:50:20,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.1666666666667) internal successors, (1693), 6 states have internal predecessors, (1693), 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) [2023-08-24 13:50:20,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:20,026 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:20,026 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 133 flow. Second operand 6 states and 1693 transitions. [2023-08-24 13:50:20,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 56 transitions, 324 flow [2023-08-24 13:50:20,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 56 transitions, 313 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-24 13:50:20,029 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 167 flow [2023-08-24 13:50:20,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=167, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-08-24 13:50:20,030 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2023-08-24 13:50:20,030 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 167 flow [2023-08-24 13:50:20,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 277.8333333333333) internal successors, (1667), 6 states have internal predecessors, (1667), 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) [2023-08-24 13:50:20,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:20,031 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] [2023-08-24 13:50:20,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 13:50:20,031 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:20,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:20,031 INFO L85 PathProgramCache]: Analyzing trace with hash 948141328, now seen corresponding path program 3 times [2023-08-24 13:50:20,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:20,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889558373] [2023-08-24 13:50:20,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:20,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:20,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889558373] [2023-08-24 13:50:20,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889558373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:20,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:20,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:20,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798109673] [2023-08-24 13:50:20,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:20,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:20,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:20,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:20,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:20,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 745 [2023-08-24 13:50:20,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 167 flow. Second operand has 6 states, 6 states have (on average 277.8333333333333) internal successors, (1667), 6 states have internal predecessors, (1667), 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) [2023-08-24 13:50:20,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:20,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 745 [2023-08-24 13:50:20,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:20,865 INFO L124 PetriNetUnfolderBase]: 87/192 cut-off events. [2023-08-24 13:50:20,865 INFO L125 PetriNetUnfolderBase]: For 272/272 co-relation queries the response was YES. [2023-08-24 13:50:20,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 192 events. 87/192 cut-off events. For 272/272 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 619 event pairs, 36 based on Foata normal form. 1/183 useless extension candidates. Maximal degree in co-relation 637. Up to 152 conditions per place. [2023-08-24 13:50:20,867 INFO L140 encePairwiseOnDemand]: 739/745 looper letters, 43 selfloop transitions, 6 changer transitions 7/56 dead transitions. [2023-08-24 13:50:20,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 56 transitions, 358 flow [2023-08-24 13:50:20,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1693 transitions. [2023-08-24 13:50:20,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787472035794183 [2023-08-24 13:50:20,872 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1693 transitions. [2023-08-24 13:50:20,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1693 transitions. [2023-08-24 13:50:20,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:20,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1693 transitions. [2023-08-24 13:50:20,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.1666666666667) internal successors, (1693), 6 states have internal predecessors, (1693), 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) [2023-08-24 13:50:20,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:20,895 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:20,896 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 167 flow. Second operand 6 states and 1693 transitions. [2023-08-24 13:50:20,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 56 transitions, 358 flow [2023-08-24 13:50:20,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 56 transitions, 330 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-24 13:50:20,899 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 195 flow [2023-08-24 13:50:20,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=195, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2023-08-24 13:50:20,899 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-08-24 13:50:20,899 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 195 flow [2023-08-24 13:50:20,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 277.8333333333333) internal successors, (1667), 6 states have internal predecessors, (1667), 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) [2023-08-24 13:50:20,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:20,901 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] [2023-08-24 13:50:20,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 13:50:20,901 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:20,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash 665619861, now seen corresponding path program 1 times [2023-08-24 13:50:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:20,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113324297] [2023-08-24 13:50:20,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:20,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:21,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:21,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113324297] [2023-08-24 13:50:21,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113324297] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:21,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:21,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:21,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771980495] [2023-08-24 13:50:21,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:21,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:21,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:21,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:21,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:21,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 745 [2023-08-24 13:50:21,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 195 flow. Second operand has 6 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 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) [2023-08-24 13:50:21,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:21,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 745 [2023-08-24 13:50:21,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:21,932 INFO L124 PetriNetUnfolderBase]: 129/305 cut-off events. [2023-08-24 13:50:21,932 INFO L125 PetriNetUnfolderBase]: For 249/249 co-relation queries the response was YES. [2023-08-24 13:50:21,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 305 events. 129/305 cut-off events. For 249/249 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1335 event pairs, 35 based on Foata normal form. 1/289 useless extension candidates. Maximal degree in co-relation 938. Up to 170 conditions per place. [2023-08-24 13:50:21,934 INFO L140 encePairwiseOnDemand]: 739/745 looper letters, 63 selfloop transitions, 11 changer transitions 5/79 dead transitions. [2023-08-24 13:50:21,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 520 flow [2023-08-24 13:50:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:21,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1686 transitions. [2023-08-24 13:50:21,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37718120805369126 [2023-08-24 13:50:21,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1686 transitions. [2023-08-24 13:50:21,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1686 transitions. [2023-08-24 13:50:21,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:21,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1686 transitions. [2023-08-24 13:50:21,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 281.0) internal successors, (1686), 6 states have internal predecessors, (1686), 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) [2023-08-24 13:50:21,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:21,950 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:21,950 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 195 flow. Second operand 6 states and 1686 transitions. [2023-08-24 13:50:21,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 520 flow [2023-08-24 13:50:21,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 505 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 13:50:21,954 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 272 flow [2023-08-24 13:50:21,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-24 13:50:21,954 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2023-08-24 13:50:21,954 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 272 flow [2023-08-24 13:50:21,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 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) [2023-08-24 13:50:21,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:21,955 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] [2023-08-24 13:50:21,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 13:50:21,955 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:21,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:21,956 INFO L85 PathProgramCache]: Analyzing trace with hash 128534389, now seen corresponding path program 2 times [2023-08-24 13:50:21,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:21,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658904307] [2023-08-24 13:50:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:21,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:22,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:22,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:22,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658904307] [2023-08-24 13:50:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658904307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:22,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:22,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:22,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029457971] [2023-08-24 13:50:22,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:22,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:22,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:22,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:22,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:22,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 745 [2023-08-24 13:50:22,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 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) [2023-08-24 13:50:22,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:22,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 745 [2023-08-24 13:50:22,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:23,141 INFO L124 PetriNetUnfolderBase]: 133/325 cut-off events. [2023-08-24 13:50:23,141 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-08-24 13:50:23,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1138 conditions, 325 events. 133/325 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1483 event pairs, 39 based on Foata normal form. 1/325 useless extension candidates. Maximal degree in co-relation 1105. Up to 165 conditions per place. [2023-08-24 13:50:23,144 INFO L140 encePairwiseOnDemand]: 740/745 looper letters, 61 selfloop transitions, 8 changer transitions 5/74 dead transitions. [2023-08-24 13:50:23,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 74 transitions, 530 flow [2023-08-24 13:50:23,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1679 transitions. [2023-08-24 13:50:23,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3756152125279642 [2023-08-24 13:50:23,149 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1679 transitions. [2023-08-24 13:50:23,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1679 transitions. [2023-08-24 13:50:23,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:23,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1679 transitions. [2023-08-24 13:50:23,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 279.8333333333333) internal successors, (1679), 6 states have internal predecessors, (1679), 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) [2023-08-24 13:50:23,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:23,159 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:23,159 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 272 flow. Second operand 6 states and 1679 transitions. [2023-08-24 13:50:23,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 74 transitions, 530 flow [2023-08-24 13:50:23,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 74 transitions, 526 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 13:50:23,163 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 315 flow [2023-08-24 13:50:23,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2023-08-24 13:50:23,164 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2023-08-24 13:50:23,164 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 315 flow [2023-08-24 13:50:23,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 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) [2023-08-24 13:50:23,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:23,165 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] [2023-08-24 13:50:23,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 13:50:23,165 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:23,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:23,165 INFO L85 PathProgramCache]: Analyzing trace with hash 904196560, now seen corresponding path program 4 times [2023-08-24 13:50:23,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:23,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155802748] [2023-08-24 13:50:23,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:23,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:23,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:23,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155802748] [2023-08-24 13:50:23,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155802748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:23,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:23,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:23,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75062358] [2023-08-24 13:50:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:23,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:23,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:23,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 274 out of 745 [2023-08-24 13:50:23,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 315 flow. Second operand has 6 states, 6 states have (on average 277.8333333333333) internal successors, (1667), 6 states have internal predecessors, (1667), 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) [2023-08-24 13:50:23,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:23,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 274 of 745 [2023-08-24 13:50:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:23,932 INFO L124 PetriNetUnfolderBase]: 132/317 cut-off events. [2023-08-24 13:50:23,932 INFO L125 PetriNetUnfolderBase]: For 971/971 co-relation queries the response was YES. [2023-08-24 13:50:23,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 317 events. 132/317 cut-off events. For 971/971 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1410 event pairs, 66 based on Foata normal form. 2/318 useless extension candidates. Maximal degree in co-relation 1168. Up to 257 conditions per place. [2023-08-24 13:50:23,935 INFO L140 encePairwiseOnDemand]: 739/745 looper letters, 40 selfloop transitions, 6 changer transitions 16/62 dead transitions. [2023-08-24 13:50:23,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 506 flow [2023-08-24 13:50:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:23,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1689 transitions. [2023-08-24 13:50:23,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37785234899328857 [2023-08-24 13:50:23,939 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1689 transitions. [2023-08-24 13:50:23,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1689 transitions. [2023-08-24 13:50:23,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:23,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1689 transitions. [2023-08-24 13:50:23,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 281.5) internal successors, (1689), 6 states have internal predecessors, (1689), 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) [2023-08-24 13:50:23,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:23,950 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:23,950 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 315 flow. Second operand 6 states and 1689 transitions. [2023-08-24 13:50:23,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 506 flow [2023-08-24 13:50:23,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 496 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-24 13:50:23,955 INFO L231 Difference]: Finished difference. Result has 65 places, 46 transitions, 291 flow [2023-08-24 13:50:23,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=65, PETRI_TRANSITIONS=46} [2023-08-24 13:50:23,955 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 38 predicate places. [2023-08-24 13:50:23,955 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 46 transitions, 291 flow [2023-08-24 13:50:23,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 277.8333333333333) internal successors, (1667), 6 states have internal predecessors, (1667), 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) [2023-08-24 13:50:23,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:23,956 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] [2023-08-24 13:50:23,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 13:50:23,957 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:23,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1983406555, now seen corresponding path program 3 times [2023-08-24 13:50:23,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:23,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505942430] [2023-08-24 13:50:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505942430] [2023-08-24 13:50:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505942430] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:24,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:24,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419625655] [2023-08-24 13:50:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:24,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 745 [2023-08-24 13:50:24,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 46 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 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) [2023-08-24 13:50:24,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:24,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 745 [2023-08-24 13:50:24,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:24,960 INFO L124 PetriNetUnfolderBase]: 127/311 cut-off events. [2023-08-24 13:50:24,961 INFO L125 PetriNetUnfolderBase]: For 630/630 co-relation queries the response was YES. [2023-08-24 13:50:24,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1171 conditions, 311 events. 127/311 cut-off events. For 630/630 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1412 event pairs, 32 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 1134. Up to 158 conditions per place. [2023-08-24 13:50:24,963 INFO L140 encePairwiseOnDemand]: 739/745 looper letters, 55 selfloop transitions, 12 changer transitions 9/76 dead transitions. [2023-08-24 13:50:24,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 76 transitions, 579 flow [2023-08-24 13:50:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1684 transitions. [2023-08-24 13:50:24,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3767337807606264 [2023-08-24 13:50:24,968 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1684 transitions. [2023-08-24 13:50:24,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1684 transitions. [2023-08-24 13:50:24,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:24,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1684 transitions. [2023-08-24 13:50:24,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 280.6666666666667) internal successors, (1684), 6 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 13:50:24,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:24,979 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:24,979 INFO L175 Difference]: Start difference. First operand has 65 places, 46 transitions, 291 flow. Second operand 6 states and 1684 transitions. [2023-08-24 13:50:24,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 76 transitions, 579 flow [2023-08-24 13:50:24,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 76 transitions, 541 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-24 13:50:24,983 INFO L231 Difference]: Finished difference. Result has 63 places, 48 transitions, 322 flow [2023-08-24 13:50:24,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=63, PETRI_TRANSITIONS=48} [2023-08-24 13:50:24,983 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 36 predicate places. [2023-08-24 13:50:24,984 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 48 transitions, 322 flow [2023-08-24 13:50:24,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 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) [2023-08-24 13:50:24,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:24,984 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] [2023-08-24 13:50:24,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 13:50:24,985 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:24,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:24,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1128098041, now seen corresponding path program 4 times [2023-08-24 13:50:24,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:24,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274944210] [2023-08-24 13:50:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:24,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:25,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:25,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:25,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274944210] [2023-08-24 13:50:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274944210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:25,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:25,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221976672] [2023-08-24 13:50:25,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:25,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:25,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 745 [2023-08-24 13:50:25,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 48 transitions, 322 flow. Second operand has 6 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 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) [2023-08-24 13:50:25,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:25,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 745 [2023-08-24 13:50:25,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:26,130 INFO L124 PetriNetUnfolderBase]: 124/302 cut-off events. [2023-08-24 13:50:26,130 INFO L125 PetriNetUnfolderBase]: For 711/711 co-relation queries the response was YES. [2023-08-24 13:50:26,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 302 events. 124/302 cut-off events. For 711/711 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1334 event pairs, 26 based on Foata normal form. 1/302 useless extension candidates. Maximal degree in co-relation 1121. Up to 158 conditions per place. [2023-08-24 13:50:26,133 INFO L140 encePairwiseOnDemand]: 739/745 looper letters, 66 selfloop transitions, 13 changer transitions 8/87 dead transitions. [2023-08-24 13:50:26,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 87 transitions, 658 flow [2023-08-24 13:50:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1692 transitions. [2023-08-24 13:50:26,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3785234899328859 [2023-08-24 13:50:26,138 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1692 transitions. [2023-08-24 13:50:26,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1692 transitions. [2023-08-24 13:50:26,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:26,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1692 transitions. [2023-08-24 13:50:26,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 282.0) internal successors, (1692), 6 states have internal predecessors, (1692), 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) [2023-08-24 13:50:26,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:26,149 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:26,149 INFO L175 Difference]: Start difference. First operand has 63 places, 48 transitions, 322 flow. Second operand 6 states and 1692 transitions. [2023-08-24 13:50:26,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 87 transitions, 658 flow [2023-08-24 13:50:26,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 631 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-24 13:50:26,154 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 373 flow [2023-08-24 13:50:26,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=373, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-08-24 13:50:26,155 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2023-08-24 13:50:26,155 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 373 flow [2023-08-24 13:50:26,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 274.8333333333333) internal successors, (1649), 6 states have internal predecessors, (1649), 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) [2023-08-24 13:50:26,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:26,156 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] [2023-08-24 13:50:26,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 13:50:26,156 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:26,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1541815509, now seen corresponding path program 5 times [2023-08-24 13:50:26,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:26,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246262771] [2023-08-24 13:50:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:26,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:27,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:27,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246262771] [2023-08-24 13:50:27,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246262771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:27,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:27,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 13:50:27,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677551344] [2023-08-24 13:50:27,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:27,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:50:27,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:27,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:50:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-24 13:50:27,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 745 [2023-08-24 13:50:27,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 373 flow. Second operand has 9 states, 9 states have (on average 263.55555555555554) internal successors, (2372), 9 states have internal predecessors, (2372), 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) [2023-08-24 13:50:27,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:27,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 745 [2023-08-24 13:50:27,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:27,523 INFO L124 PetriNetUnfolderBase]: 127/319 cut-off events. [2023-08-24 13:50:27,524 INFO L125 PetriNetUnfolderBase]: For 985/985 co-relation queries the response was YES. [2023-08-24 13:50:27,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 319 events. 127/319 cut-off events. For 985/985 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1473 event pairs, 20 based on Foata normal form. 1/319 useless extension candidates. Maximal degree in co-relation 1207. Up to 174 conditions per place. [2023-08-24 13:50:27,526 INFO L140 encePairwiseOnDemand]: 738/745 looper letters, 63 selfloop transitions, 11 changer transitions 5/79 dead transitions. [2023-08-24 13:50:27,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 640 flow [2023-08-24 13:50:27,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:50:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:50:27,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2144 transitions. [2023-08-24 13:50:27,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597315436241611 [2023-08-24 13:50:27,532 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2144 transitions. [2023-08-24 13:50:27,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2144 transitions. [2023-08-24 13:50:27,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:27,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2144 transitions. [2023-08-24 13:50:27,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 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) [2023-08-24 13:50:27,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:27,548 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:27,548 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 373 flow. Second operand 8 states and 2144 transitions. [2023-08-24 13:50:27,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 640 flow [2023-08-24 13:50:27,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 623 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-24 13:50:27,554 INFO L231 Difference]: Finished difference. Result has 76 places, 52 transitions, 422 flow [2023-08-24 13:50:27,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=76, PETRI_TRANSITIONS=52} [2023-08-24 13:50:27,555 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 49 predicate places. [2023-08-24 13:50:27,555 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 52 transitions, 422 flow [2023-08-24 13:50:27,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 263.55555555555554) internal successors, (2372), 9 states have internal predecessors, (2372), 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) [2023-08-24 13:50:27,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:27,556 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] [2023-08-24 13:50:27,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 13:50:27,556 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:27,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1217777413, now seen corresponding path program 6 times [2023-08-24 13:50:27,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:27,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361850480] [2023-08-24 13:50:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:27,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:27,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:28,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361850480] [2023-08-24 13:50:28,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361850480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:28,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:28,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 13:50:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659422845] [2023-08-24 13:50:28,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:28,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:50:28,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:50:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-24 13:50:28,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 745 [2023-08-24 13:50:28,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 52 transitions, 422 flow. Second operand has 9 states, 9 states have (on average 263.55555555555554) internal successors, (2372), 9 states have internal predecessors, (2372), 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) [2023-08-24 13:50:28,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:28,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 745 [2023-08-24 13:50:28,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:28,694 INFO L124 PetriNetUnfolderBase]: 160/405 cut-off events. [2023-08-24 13:50:28,694 INFO L125 PetriNetUnfolderBase]: For 1806/1806 co-relation queries the response was YES. [2023-08-24 13:50:28,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1669 conditions, 405 events. 160/405 cut-off events. For 1806/1806 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2062 event pairs, 38 based on Foata normal form. 1/405 useless extension candidates. Maximal degree in co-relation 1624. Up to 211 conditions per place. [2023-08-24 13:50:28,697 INFO L140 encePairwiseOnDemand]: 737/745 looper letters, 56 selfloop transitions, 17 changer transitions 9/82 dead transitions. [2023-08-24 13:50:28,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 82 transitions, 725 flow [2023-08-24 13:50:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:50:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:50:28,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2145 transitions. [2023-08-24 13:50:28,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3598993288590604 [2023-08-24 13:50:28,706 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2145 transitions. [2023-08-24 13:50:28,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2145 transitions. [2023-08-24 13:50:28,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:28,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2145 transitions. [2023-08-24 13:50:28,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 268.125) internal successors, (2145), 8 states have internal predecessors, (2145), 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) [2023-08-24 13:50:28,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:28,720 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:28,720 INFO L175 Difference]: Start difference. First operand has 76 places, 52 transitions, 422 flow. Second operand 8 states and 2145 transitions. [2023-08-24 13:50:28,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 82 transitions, 725 flow [2023-08-24 13:50:28,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 82 transitions, 711 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-24 13:50:28,729 INFO L231 Difference]: Finished difference. Result has 81 places, 53 transitions, 475 flow [2023-08-24 13:50:28,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=475, PETRI_PLACES=81, PETRI_TRANSITIONS=53} [2023-08-24 13:50:28,729 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 54 predicate places. [2023-08-24 13:50:28,730 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 53 transitions, 475 flow [2023-08-24 13:50:28,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 263.55555555555554) internal successors, (2372), 9 states have internal predecessors, (2372), 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) [2023-08-24 13:50:28,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:28,730 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] [2023-08-24 13:50:28,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 13:50:28,731 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:28,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:28,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1573332637, now seen corresponding path program 7 times [2023-08-24 13:50:28,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:28,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884396735] [2023-08-24 13:50:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:28,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:29,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:29,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884396735] [2023-08-24 13:50:29,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884396735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:29,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:29,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-24 13:50:29,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924977738] [2023-08-24 13:50:29,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:29,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 13:50:29,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 13:50:29,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-08-24 13:50:29,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 745 [2023-08-24 13:50:29,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 53 transitions, 475 flow. Second operand has 11 states, 11 states have (on average 252.0909090909091) internal successors, (2773), 11 states have internal predecessors, (2773), 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) [2023-08-24 13:50:29,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:29,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 745 [2023-08-24 13:50:29,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:30,245 INFO L124 PetriNetUnfolderBase]: 161/428 cut-off events. [2023-08-24 13:50:30,245 INFO L125 PetriNetUnfolderBase]: For 2078/2078 co-relation queries the response was YES. [2023-08-24 13:50:30,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1798 conditions, 428 events. 161/428 cut-off events. For 2078/2078 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2287 event pairs, 18 based on Foata normal form. 1/428 useless extension candidates. Maximal degree in co-relation 1751. Up to 114 conditions per place. [2023-08-24 13:50:30,249 INFO L140 encePairwiseOnDemand]: 732/745 looper letters, 62 selfloop transitions, 37 changer transitions 11/110 dead transitions. [2023-08-24 13:50:30,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 1015 flow [2023-08-24 13:50:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 13:50:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 13:50:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 3336 transitions. [2023-08-24 13:50:30,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34445018069179145 [2023-08-24 13:50:30,257 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 3336 transitions. [2023-08-24 13:50:30,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 3336 transitions. [2023-08-24 13:50:30,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:30,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 3336 transitions. [2023-08-24 13:50:30,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 256.61538461538464) internal successors, (3336), 13 states have internal predecessors, (3336), 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) [2023-08-24 13:50:30,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 745.0) internal successors, (10430), 14 states have internal predecessors, (10430), 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) [2023-08-24 13:50:30,276 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 745.0) internal successors, (10430), 14 states have internal predecessors, (10430), 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) [2023-08-24 13:50:30,276 INFO L175 Difference]: Start difference. First operand has 81 places, 53 transitions, 475 flow. Second operand 13 states and 3336 transitions. [2023-08-24 13:50:30,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 1015 flow [2023-08-24 13:50:30,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 110 transitions, 978 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-24 13:50:30,284 INFO L231 Difference]: Finished difference. Result has 90 places, 73 transitions, 776 flow [2023-08-24 13:50:30,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=776, PETRI_PLACES=90, PETRI_TRANSITIONS=73} [2023-08-24 13:50:30,285 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 63 predicate places. [2023-08-24 13:50:30,285 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 73 transitions, 776 flow [2023-08-24 13:50:30,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 252.0909090909091) internal successors, (2773), 11 states have internal predecessors, (2773), 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) [2023-08-24 13:50:30,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:30,286 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] [2023-08-24 13:50:30,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 13:50:30,286 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:30,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:30,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1541221753, now seen corresponding path program 8 times [2023-08-24 13:50:30,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:30,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217615293] [2023-08-24 13:50:30,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:30,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:30,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:30,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217615293] [2023-08-24 13:50:30,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217615293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:30,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:30,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 13:50:30,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488156511] [2023-08-24 13:50:30,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:30,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 13:50:30,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:30,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 13:50:30,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-24 13:50:30,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 261 out of 745 [2023-08-24 13:50:30,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 73 transitions, 776 flow. Second operand has 9 states, 9 states have (on average 263.55555555555554) internal successors, (2372), 9 states have internal predecessors, (2372), 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) [2023-08-24 13:50:30,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:30,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 261 of 745 [2023-08-24 13:50:30,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:31,275 INFO L124 PetriNetUnfolderBase]: 154/404 cut-off events. [2023-08-24 13:50:31,275 INFO L125 PetriNetUnfolderBase]: For 2490/2490 co-relation queries the response was YES. [2023-08-24 13:50:31,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 404 events. 154/404 cut-off events. For 2490/2490 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2096 event pairs, 19 based on Foata normal form. 1/404 useless extension candidates. Maximal degree in co-relation 1901. Up to 168 conditions per place. [2023-08-24 13:50:31,278 INFO L140 encePairwiseOnDemand]: 737/745 looper letters, 63 selfloop transitions, 25 changer transitions 6/94 dead transitions. [2023-08-24 13:50:31,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 94 transitions, 1043 flow [2023-08-24 13:50:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:50:31,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:50:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2146 transitions. [2023-08-24 13:50:31,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36006711409395975 [2023-08-24 13:50:31,284 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2146 transitions. [2023-08-24 13:50:31,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2146 transitions. [2023-08-24 13:50:31,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:31,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2146 transitions. [2023-08-24 13:50:31,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 268.25) internal successors, (2146), 8 states have internal predecessors, (2146), 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) [2023-08-24 13:50:31,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:31,296 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:31,296 INFO L175 Difference]: Start difference. First operand has 90 places, 73 transitions, 776 flow. Second operand 8 states and 2146 transitions. [2023-08-24 13:50:31,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 94 transitions, 1043 flow [2023-08-24 13:50:31,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 986 flow, removed 24 selfloop flow, removed 5 redundant places. [2023-08-24 13:50:31,308 INFO L231 Difference]: Finished difference. Result has 92 places, 72 transitions, 764 flow [2023-08-24 13:50:31,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=764, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2023-08-24 13:50:31,310 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 65 predicate places. [2023-08-24 13:50:31,310 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 764 flow [2023-08-24 13:50:31,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 263.55555555555554) internal successors, (2372), 9 states have internal predecessors, (2372), 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) [2023-08-24 13:50:31,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:31,311 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] [2023-08-24 13:50:31,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 13:50:31,311 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:31,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:31,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1370610357, now seen corresponding path program 9 times [2023-08-24 13:50:31,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:31,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528045864] [2023-08-24 13:50:31,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:31,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:32,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:32,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528045864] [2023-08-24 13:50:32,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528045864] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:32,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:32,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-24 13:50:32,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052050610] [2023-08-24 13:50:32,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:32,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 13:50:32,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:32,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 13:50:32,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-08-24 13:50:32,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 745 [2023-08-24 13:50:32,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 764 flow. Second operand has 12 states, 12 states have (on average 245.91666666666666) internal successors, (2951), 12 states have internal predecessors, (2951), 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) [2023-08-24 13:50:32,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:32,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 745 [2023-08-24 13:50:32,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:32,895 INFO L124 PetriNetUnfolderBase]: 150/403 cut-off events. [2023-08-24 13:50:32,896 INFO L125 PetriNetUnfolderBase]: For 2240/2240 co-relation queries the response was YES. [2023-08-24 13:50:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1880 conditions, 403 events. 150/403 cut-off events. For 2240/2240 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2114 event pairs, 13 based on Foata normal form. 1/403 useless extension candidates. Maximal degree in co-relation 1831. Up to 149 conditions per place. [2023-08-24 13:50:32,899 INFO L140 encePairwiseOnDemand]: 733/745 looper letters, 60 selfloop transitions, 36 changer transitions 11/107 dead transitions. [2023-08-24 13:50:32,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 107 transitions, 1110 flow [2023-08-24 13:50:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 13:50:32,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 13:50:32,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2754 transitions. [2023-08-24 13:50:32,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33605857230018304 [2023-08-24 13:50:32,904 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2754 transitions. [2023-08-24 13:50:32,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2754 transitions. [2023-08-24 13:50:32,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:32,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2754 transitions. [2023-08-24 13:50:32,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 250.36363636363637) internal successors, (2754), 11 states have internal predecessors, (2754), 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) [2023-08-24 13:50:32,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 745.0) internal successors, (8940), 12 states have internal predecessors, (8940), 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) [2023-08-24 13:50:32,918 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 745.0) internal successors, (8940), 12 states have internal predecessors, (8940), 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) [2023-08-24 13:50:32,918 INFO L175 Difference]: Start difference. First operand has 92 places, 72 transitions, 764 flow. Second operand 11 states and 2754 transitions. [2023-08-24 13:50:32,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 107 transitions, 1110 flow [2023-08-24 13:50:32,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 107 transitions, 1046 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-24 13:50:32,929 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 889 flow [2023-08-24 13:50:32,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=889, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2023-08-24 13:50:32,930 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 68 predicate places. [2023-08-24 13:50:32,930 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 889 flow [2023-08-24 13:50:32,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 245.91666666666666) internal successors, (2951), 12 states have internal predecessors, (2951), 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) [2023-08-24 13:50:32,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:32,930 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] [2023-08-24 13:50:32,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 13:50:32,931 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:32,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash -474618431, now seen corresponding path program 10 times [2023-08-24 13:50:32,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:32,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682760450] [2023-08-24 13:50:32,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:33,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:33,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682760450] [2023-08-24 13:50:33,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682760450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:33,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:33,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:50:33,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489453703] [2023-08-24 13:50:33,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:33,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:50:33,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:33,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:50:33,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:50:33,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 745 [2023-08-24 13:50:33,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 889 flow. Second operand has 10 states, 10 states have (on average 257.3) internal successors, (2573), 10 states have internal predecessors, (2573), 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) [2023-08-24 13:50:33,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:33,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 745 [2023-08-24 13:50:33,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:34,054 INFO L124 PetriNetUnfolderBase]: 154/417 cut-off events. [2023-08-24 13:50:34,055 INFO L125 PetriNetUnfolderBase]: For 3096/3096 co-relation queries the response was YES. [2023-08-24 13:50:34,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2176 conditions, 417 events. 154/417 cut-off events. For 3096/3096 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2202 event pairs, 31 based on Foata normal form. 1/417 useless extension candidates. Maximal degree in co-relation 2129. Up to 344 conditions per place. [2023-08-24 13:50:34,058 INFO L140 encePairwiseOnDemand]: 739/745 looper letters, 72 selfloop transitions, 8 changer transitions 13/93 dead transitions. [2023-08-24 13:50:34,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 93 transitions, 1145 flow [2023-08-24 13:50:34,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:50:34,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:50:34,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1830 transitions. [2023-08-24 13:50:34,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35091083413231067 [2023-08-24 13:50:34,062 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1830 transitions. [2023-08-24 13:50:34,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1830 transitions. [2023-08-24 13:50:34,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:34,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1830 transitions. [2023-08-24 13:50:34,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 261.42857142857144) internal successors, (1830), 7 states have internal predecessors, (1830), 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) [2023-08-24 13:50:34,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 745.0) internal successors, (5960), 8 states have internal predecessors, (5960), 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) [2023-08-24 13:50:34,071 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 745.0) internal successors, (5960), 8 states have internal predecessors, (5960), 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) [2023-08-24 13:50:34,071 INFO L175 Difference]: Start difference. First operand has 95 places, 79 transitions, 889 flow. Second operand 7 states and 1830 transitions. [2023-08-24 13:50:34,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 93 transitions, 1145 flow [2023-08-24 13:50:34,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 93 transitions, 1122 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-24 13:50:34,083 INFO L231 Difference]: Finished difference. Result has 96 places, 76 transitions, 851 flow [2023-08-24 13:50:34,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=96, PETRI_TRANSITIONS=76} [2023-08-24 13:50:34,083 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 69 predicate places. [2023-08-24 13:50:34,083 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 76 transitions, 851 flow [2023-08-24 13:50:34,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 257.3) internal successors, (2573), 10 states have internal predecessors, (2573), 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) [2023-08-24 13:50:34,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:34,084 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] [2023-08-24 13:50:34,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 13:50:34,085 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:34,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:34,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1450455224, now seen corresponding path program 5 times [2023-08-24 13:50:34,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:34,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738466750] [2023-08-24 13:50:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:34,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:34,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:34,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738466750] [2023-08-24 13:50:34,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738466750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:34,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:34,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:50:34,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234709434] [2023-08-24 13:50:34,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:34,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:50:34,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:34,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:50:34,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:50:34,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 745 [2023-08-24 13:50:34,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 76 transitions, 851 flow. Second operand has 10 states, 10 states have (on average 260.3) internal successors, (2603), 10 states have internal predecessors, (2603), 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) [2023-08-24 13:50:34,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:34,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 745 [2023-08-24 13:50:34,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:34,971 INFO L124 PetriNetUnfolderBase]: 153/440 cut-off events. [2023-08-24 13:50:34,971 INFO L125 PetriNetUnfolderBase]: For 3654/3654 co-relation queries the response was YES. [2023-08-24 13:50:34,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 440 events. 153/440 cut-off events. For 3654/3654 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2453 event pairs, 89 based on Foata normal form. 1/440 useless extension candidates. Maximal degree in co-relation 2224. Up to 326 conditions per place. [2023-08-24 13:50:34,975 INFO L140 encePairwiseOnDemand]: 737/745 looper letters, 85 selfloop transitions, 11 changer transitions 7/103 dead transitions. [2023-08-24 13:50:34,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 103 transitions, 1237 flow [2023-08-24 13:50:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:50:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:50:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2117 transitions. [2023-08-24 13:50:34,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3552013422818792 [2023-08-24 13:50:34,981 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2117 transitions. [2023-08-24 13:50:34,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2117 transitions. [2023-08-24 13:50:34,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:34,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2117 transitions. [2023-08-24 13:50:34,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 264.625) internal successors, (2117), 8 states have internal predecessors, (2117), 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) [2023-08-24 13:50:34,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:34,994 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:34,994 INFO L175 Difference]: Start difference. First operand has 96 places, 76 transitions, 851 flow. Second operand 8 states and 2117 transitions. [2023-08-24 13:50:34,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 103 transitions, 1237 flow [2023-08-24 13:50:35,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 1156 flow, removed 8 selfloop flow, removed 12 redundant places. [2023-08-24 13:50:35,007 INFO L231 Difference]: Finished difference. Result has 91 places, 78 transitions, 847 flow [2023-08-24 13:50:35,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=785, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=847, PETRI_PLACES=91, PETRI_TRANSITIONS=78} [2023-08-24 13:50:35,009 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 64 predicate places. [2023-08-24 13:50:35,009 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 78 transitions, 847 flow [2023-08-24 13:50:35,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 260.3) internal successors, (2603), 10 states have internal predecessors, (2603), 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) [2023-08-24 13:50:35,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:35,010 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] [2023-08-24 13:50:35,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 13:50:35,011 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:35,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:35,011 INFO L85 PathProgramCache]: Analyzing trace with hash -813225734, now seen corresponding path program 6 times [2023-08-24 13:50:35,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:35,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890840916] [2023-08-24 13:50:35,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:35,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:35,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:35,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:35,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890840916] [2023-08-24 13:50:35,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890840916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:35,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:35,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:50:35,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100494000] [2023-08-24 13:50:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:35,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:50:35,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:35,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:50:35,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:50:35,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 745 [2023-08-24 13:50:35,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 78 transitions, 847 flow. Second operand has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 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) [2023-08-24 13:50:35,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:35,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 745 [2023-08-24 13:50:35,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:35,769 INFO L124 PetriNetUnfolderBase]: 151/457 cut-off events. [2023-08-24 13:50:35,770 INFO L125 PetriNetUnfolderBase]: For 2874/2874 co-relation queries the response was YES. [2023-08-24 13:50:35,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2301 conditions, 457 events. 151/457 cut-off events. For 2874/2874 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2660 event pairs, 86 based on Foata normal form. 4/460 useless extension candidates. Maximal degree in co-relation 2258. Up to 358 conditions per place. [2023-08-24 13:50:35,773 INFO L140 encePairwiseOnDemand]: 740/745 looper letters, 61 selfloop transitions, 15 changer transitions 13/89 dead transitions. [2023-08-24 13:50:35,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 89 transitions, 1089 flow [2023-08-24 13:50:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:50:35,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:50:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1417 transitions. [2023-08-24 13:50:35,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38040268456375836 [2023-08-24 13:50:35,777 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1417 transitions. [2023-08-24 13:50:35,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1417 transitions. [2023-08-24 13:50:35,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:35,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1417 transitions. [2023-08-24 13:50:35,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 283.4) internal successors, (1417), 5 states have internal predecessors, (1417), 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) [2023-08-24 13:50:35,782 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 745.0) internal successors, (4470), 6 states have internal predecessors, (4470), 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) [2023-08-24 13:50:35,783 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 745.0) internal successors, (4470), 6 states have internal predecessors, (4470), 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) [2023-08-24 13:50:35,783 INFO L175 Difference]: Start difference. First operand has 91 places, 78 transitions, 847 flow. Second operand 5 states and 1417 transitions. [2023-08-24 13:50:35,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 89 transitions, 1089 flow [2023-08-24 13:50:35,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 89 transitions, 1072 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-24 13:50:35,796 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 821 flow [2023-08-24 13:50:35,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=821, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2023-08-24 13:50:35,796 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 64 predicate places. [2023-08-24 13:50:35,797 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 821 flow [2023-08-24 13:50:35,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 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) [2023-08-24 13:50:35,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:35,797 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] [2023-08-24 13:50:35,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-24 13:50:35,798 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:35,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:35,799 INFO L85 PathProgramCache]: Analyzing trace with hash -858156676, now seen corresponding path program 7 times [2023-08-24 13:50:35,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:35,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892375144] [2023-08-24 13:50:35,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:35,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:36,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:36,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:36,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892375144] [2023-08-24 13:50:36,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892375144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:36,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:36,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-24 13:50:36,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807024438] [2023-08-24 13:50:36,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:36,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 13:50:36,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:36,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 13:50:36,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-24 13:50:36,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 745 [2023-08-24 13:50:36,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 821 flow. Second operand has 11 states, 11 states have (on average 250.0909090909091) internal successors, (2751), 11 states have internal predecessors, (2751), 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) [2023-08-24 13:50:36,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:36,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 745 [2023-08-24 13:50:36,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:36,847 INFO L124 PetriNetUnfolderBase]: 139/413 cut-off events. [2023-08-24 13:50:36,847 INFO L125 PetriNetUnfolderBase]: For 2651/2651 co-relation queries the response was YES. [2023-08-24 13:50:36,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2200 conditions, 413 events. 139/413 cut-off events. For 2651/2651 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2290 event pairs, 87 based on Foata normal form. 1/413 useless extension candidates. Maximal degree in co-relation 2157. Up to 325 conditions per place. [2023-08-24 13:50:36,851 INFO L140 encePairwiseOnDemand]: 738/745 looper letters, 77 selfloop transitions, 7 changer transitions 9/93 dead transitions. [2023-08-24 13:50:36,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 93 transitions, 1126 flow [2023-08-24 13:50:36,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:50:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:50:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2032 transitions. [2023-08-24 13:50:36,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3409395973154362 [2023-08-24 13:50:36,855 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2032 transitions. [2023-08-24 13:50:36,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2032 transitions. [2023-08-24 13:50:36,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:36,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2032 transitions. [2023-08-24 13:50:36,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 254.0) internal successors, (2032), 8 states have internal predecessors, (2032), 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) [2023-08-24 13:50:36,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:36,863 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:36,863 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 821 flow. Second operand 8 states and 2032 transitions. [2023-08-24 13:50:36,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 93 transitions, 1126 flow [2023-08-24 13:50:36,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 93 transitions, 1068 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-24 13:50:36,874 INFO L231 Difference]: Finished difference. Result has 94 places, 73 transitions, 782 flow [2023-08-24 13:50:36,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=782, PETRI_PLACES=94, PETRI_TRANSITIONS=73} [2023-08-24 13:50:36,875 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2023-08-24 13:50:36,875 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 73 transitions, 782 flow [2023-08-24 13:50:36,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 250.0909090909091) internal successors, (2751), 11 states have internal predecessors, (2751), 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) [2023-08-24 13:50:36,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:36,876 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] [2023-08-24 13:50:36,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-24 13:50:36,876 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:36,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:36,877 INFO L85 PathProgramCache]: Analyzing trace with hash -897357754, now seen corresponding path program 8 times [2023-08-24 13:50:36,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:36,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123690904] [2023-08-24 13:50:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:36,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:37,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123690904] [2023-08-24 13:50:37,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123690904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:37,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:37,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:37,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303632768] [2023-08-24 13:50:37,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:37,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 13:50:37,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 13:50:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-24 13:50:37,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 745 [2023-08-24 13:50:37,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 73 transitions, 782 flow. Second operand has 7 states, 7 states have (on average 269.2857142857143) internal successors, (1885), 7 states have internal predecessors, (1885), 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) [2023-08-24 13:50:37,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:37,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 745 [2023-08-24 13:50:37,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:37,826 INFO L124 PetriNetUnfolderBase]: 128/385 cut-off events. [2023-08-24 13:50:37,826 INFO L125 PetriNetUnfolderBase]: For 2212/2212 co-relation queries the response was YES. [2023-08-24 13:50:37,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 385 events. 128/385 cut-off events. For 2212/2212 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2069 event pairs, 74 based on Foata normal form. 2/386 useless extension candidates. Maximal degree in co-relation 1955. Up to 301 conditions per place. [2023-08-24 13:50:37,830 INFO L140 encePairwiseOnDemand]: 739/745 looper letters, 57 selfloop transitions, 14 changer transitions 10/81 dead transitions. [2023-08-24 13:50:37,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 81 transitions, 977 flow [2023-08-24 13:50:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:50:37,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:50:37,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1898 transitions. [2023-08-24 13:50:37,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3639501438159156 [2023-08-24 13:50:37,833 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1898 transitions. [2023-08-24 13:50:37,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1898 transitions. [2023-08-24 13:50:37,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:37,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1898 transitions. [2023-08-24 13:50:37,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 271.14285714285717) internal successors, (1898), 7 states have internal predecessors, (1898), 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) [2023-08-24 13:50:37,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 745.0) internal successors, (5960), 8 states have internal predecessors, (5960), 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) [2023-08-24 13:50:37,842 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 745.0) internal successors, (5960), 8 states have internal predecessors, (5960), 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) [2023-08-24 13:50:37,842 INFO L175 Difference]: Start difference. First operand has 94 places, 73 transitions, 782 flow. Second operand 7 states and 1898 transitions. [2023-08-24 13:50:37,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 81 transitions, 977 flow [2023-08-24 13:50:37,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 81 transitions, 940 flow, removed 6 selfloop flow, removed 7 redundant places. [2023-08-24 13:50:37,854 INFO L231 Difference]: Finished difference. Result has 93 places, 69 transitions, 740 flow [2023-08-24 13:50:37,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=740, PETRI_PLACES=93, PETRI_TRANSITIONS=69} [2023-08-24 13:50:37,855 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 66 predicate places. [2023-08-24 13:50:37,855 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 69 transitions, 740 flow [2023-08-24 13:50:37,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 269.2857142857143) internal successors, (1885), 7 states have internal predecessors, (1885), 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) [2023-08-24 13:50:37,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:37,856 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] [2023-08-24 13:50:37,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-24 13:50:37,856 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:37,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:37,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1731286972, now seen corresponding path program 9 times [2023-08-24 13:50:37,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:37,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553898640] [2023-08-24 13:50:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:37,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:38,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:38,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553898640] [2023-08-24 13:50:38,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553898640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:38,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:38,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 13:50:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719314491] [2023-08-24 13:50:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:38,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 13:50:38,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:38,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 13:50:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 13:50:38,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 745 [2023-08-24 13:50:38,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 69 transitions, 740 flow. Second operand has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 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) [2023-08-24 13:50:38,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:38,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 745 [2023-08-24 13:50:38,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:38,677 INFO L124 PetriNetUnfolderBase]: 120/346 cut-off events. [2023-08-24 13:50:38,677 INFO L125 PetriNetUnfolderBase]: For 2113/2113 co-relation queries the response was YES. [2023-08-24 13:50:38,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1860 conditions, 346 events. 120/346 cut-off events. For 2113/2113 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1777 event pairs, 36 based on Foata normal form. 7/352 useless extension candidates. Maximal degree in co-relation 1824. Up to 153 conditions per place. [2023-08-24 13:50:38,680 INFO L140 encePairwiseOnDemand]: 741/745 looper letters, 41 selfloop transitions, 4 changer transitions 36/81 dead transitions. [2023-08-24 13:50:38,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 81 transitions, 959 flow [2023-08-24 13:50:38,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 13:50:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 13:50:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1420 transitions. [2023-08-24 13:50:38,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3812080536912752 [2023-08-24 13:50:38,683 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1420 transitions. [2023-08-24 13:50:38,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1420 transitions. [2023-08-24 13:50:38,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:38,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1420 transitions. [2023-08-24 13:50:38,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 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) [2023-08-24 13:50:38,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 745.0) internal successors, (4470), 6 states have internal predecessors, (4470), 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) [2023-08-24 13:50:38,689 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 745.0) internal successors, (4470), 6 states have internal predecessors, (4470), 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) [2023-08-24 13:50:38,689 INFO L175 Difference]: Start difference. First operand has 93 places, 69 transitions, 740 flow. Second operand 5 states and 1420 transitions. [2023-08-24 13:50:38,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 81 transitions, 959 flow [2023-08-24 13:50:38,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 915 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-08-24 13:50:38,699 INFO L231 Difference]: Finished difference. Result has 90 places, 42 transitions, 362 flow [2023-08-24 13:50:38,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=90, PETRI_TRANSITIONS=42} [2023-08-24 13:50:38,700 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 63 predicate places. [2023-08-24 13:50:38,700 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 42 transitions, 362 flow [2023-08-24 13:50:38,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 280.6) internal successors, (1403), 5 states have internal predecessors, (1403), 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) [2023-08-24 13:50:38,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:38,701 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] [2023-08-24 13:50:38,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-24 13:50:38,702 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:38,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1063722864, now seen corresponding path program 1 times [2023-08-24 13:50:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:38,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030423704] [2023-08-24 13:50:38,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:39,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:39,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030423704] [2023-08-24 13:50:39,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030423704] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:39,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:39,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 13:50:39,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054396787] [2023-08-24 13:50:39,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:39,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 13:50:39,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:39,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 13:50:39,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 13:50:39,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 267 out of 745 [2023-08-24 13:50:39,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 42 transitions, 362 flow. Second operand has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 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) [2023-08-24 13:50:39,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:39,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 267 of 745 [2023-08-24 13:50:39,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:39,340 INFO L124 PetriNetUnfolderBase]: 77/216 cut-off events. [2023-08-24 13:50:39,340 INFO L125 PetriNetUnfolderBase]: For 2002/2002 co-relation queries the response was YES. [2023-08-24 13:50:39,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1202 conditions, 216 events. 77/216 cut-off events. For 2002/2002 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 872 event pairs, 18 based on Foata normal form. 3/218 useless extension candidates. Maximal degree in co-relation 1174. Up to 84 conditions per place. [2023-08-24 13:50:39,342 INFO L140 encePairwiseOnDemand]: 738/745 looper letters, 27 selfloop transitions, 6 changer transitions 30/63 dead transitions. [2023-08-24 13:50:39,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 63 transitions, 667 flow [2023-08-24 13:50:39,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 13:50:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 13:50:39,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1647 transitions. [2023-08-24 13:50:39,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36845637583892615 [2023-08-24 13:50:39,345 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1647 transitions. [2023-08-24 13:50:39,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1647 transitions. [2023-08-24 13:50:39,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:39,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1647 transitions. [2023-08-24 13:50:39,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.5) internal successors, (1647), 6 states have internal predecessors, (1647), 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) [2023-08-24 13:50:39,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:39,351 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 745.0) internal successors, (5215), 7 states have internal predecessors, (5215), 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) [2023-08-24 13:50:39,351 INFO L175 Difference]: Start difference. First operand has 90 places, 42 transitions, 362 flow. Second operand 6 states and 1647 transitions. [2023-08-24 13:50:39,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 63 transitions, 667 flow [2023-08-24 13:50:39,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 505 flow, removed 19 selfloop flow, removed 19 redundant places. [2023-08-24 13:50:39,357 INFO L231 Difference]: Finished difference. Result has 68 places, 33 transitions, 209 flow [2023-08-24 13:50:39,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=209, PETRI_PLACES=68, PETRI_TRANSITIONS=33} [2023-08-24 13:50:39,357 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 41 predicate places. [2023-08-24 13:50:39,357 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 33 transitions, 209 flow [2023-08-24 13:50:39,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 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) [2023-08-24 13:50:39,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:39,358 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] [2023-08-24 13:50:39,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-24 13:50:39,358 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:39,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -382399426, now seen corresponding path program 2 times [2023-08-24 13:50:39,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:39,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756735821] [2023-08-24 13:50:39,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:39,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756735821] [2023-08-24 13:50:39,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756735821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:39,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:39,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 13:50:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239405125] [2023-08-24 13:50:39,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:39,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 13:50:39,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:39,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 13:50:39,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-24 13:50:39,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 251 out of 745 [2023-08-24 13:50:39,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 33 transitions, 209 flow. Second operand has 10 states, 10 states have (on average 253.4) internal successors, (2534), 10 states have internal predecessors, (2534), 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) [2023-08-24 13:50:39,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:39,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 251 of 745 [2023-08-24 13:50:39,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:40,198 INFO L124 PetriNetUnfolderBase]: 20/79 cut-off events. [2023-08-24 13:50:40,199 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2023-08-24 13:50:40,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 79 events. 20/79 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 193 event pairs, 6 based on Foata normal form. 1/79 useless extension candidates. Maximal degree in co-relation 365. Up to 26 conditions per place. [2023-08-24 13:50:40,200 INFO L140 encePairwiseOnDemand]: 737/745 looper letters, 29 selfloop transitions, 8 changer transitions 14/51 dead transitions. [2023-08-24 13:50:40,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 51 transitions, 383 flow [2023-08-24 13:50:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:50:40,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:50:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2054 transitions. [2023-08-24 13:50:40,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3446308724832215 [2023-08-24 13:50:40,203 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2054 transitions. [2023-08-24 13:50:40,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2054 transitions. [2023-08-24 13:50:40,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:40,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2054 transitions. [2023-08-24 13:50:40,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 256.75) internal successors, (2054), 8 states have internal predecessors, (2054), 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) [2023-08-24 13:50:40,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:40,211 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:40,211 INFO L175 Difference]: Start difference. First operand has 68 places, 33 transitions, 209 flow. Second operand 8 states and 2054 transitions. [2023-08-24 13:50:40,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 51 transitions, 383 flow [2023-08-24 13:50:40,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 299 flow, removed 10 selfloop flow, removed 19 redundant places. [2023-08-24 13:50:40,213 INFO L231 Difference]: Finished difference. Result has 53 places, 30 transitions, 146 flow [2023-08-24 13:50:40,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=146, PETRI_PLACES=53, PETRI_TRANSITIONS=30} [2023-08-24 13:50:40,214 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 26 predicate places. [2023-08-24 13:50:40,214 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 30 transitions, 146 flow [2023-08-24 13:50:40,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 253.4) internal successors, (2534), 10 states have internal predecessors, (2534), 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) [2023-08-24 13:50:40,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:40,214 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] [2023-08-24 13:50:40,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-24 13:50:40,215 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:40,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:40,215 INFO L85 PathProgramCache]: Analyzing trace with hash -466531446, now seen corresponding path program 3 times [2023-08-24 13:50:40,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:40,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762186463] [2023-08-24 13:50:40,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:40,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:40,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:40,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762186463] [2023-08-24 13:50:40,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762186463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:40,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:40,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 13:50:40,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377575723] [2023-08-24 13:50:40,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:40,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 13:50:40,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:40,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 13:50:40,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 13:50:40,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 745 [2023-08-24 13:50:40,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 30 transitions, 146 flow. Second operand has 8 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 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) [2023-08-24 13:50:40,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:40,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 745 [2023-08-24 13:50:40,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:40,994 INFO L124 PetriNetUnfolderBase]: 12/52 cut-off events. [2023-08-24 13:50:40,994 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-24 13:50:40,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 52 events. 12/52 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 3 based on Foata normal form. 1/52 useless extension candidates. Maximal degree in co-relation 204. Up to 29 conditions per place. [2023-08-24 13:50:40,994 INFO L140 encePairwiseOnDemand]: 738/745 looper letters, 23 selfloop transitions, 5 changer transitions 13/41 dead transitions. [2023-08-24 13:50:40,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 41 transitions, 264 flow [2023-08-24 13:50:40,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 13:50:40,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 13:50:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1899 transitions. [2023-08-24 13:50:40,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641418983700863 [2023-08-24 13:50:40,997 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1899 transitions. [2023-08-24 13:50:40,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1899 transitions. [2023-08-24 13:50:40,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:40,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1899 transitions. [2023-08-24 13:50:41,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 271.2857142857143) internal successors, (1899), 7 states have internal predecessors, (1899), 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) [2023-08-24 13:50:41,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 745.0) internal successors, (5960), 8 states have internal predecessors, (5960), 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) [2023-08-24 13:50:41,004 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 745.0) internal successors, (5960), 8 states have internal predecessors, (5960), 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) [2023-08-24 13:50:41,005 INFO L175 Difference]: Start difference. First operand has 53 places, 30 transitions, 146 flow. Second operand 7 states and 1899 transitions. [2023-08-24 13:50:41,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 41 transitions, 264 flow [2023-08-24 13:50:41,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 41 transitions, 230 flow, removed 4 selfloop flow, removed 11 redundant places. [2023-08-24 13:50:41,006 INFO L231 Difference]: Finished difference. Result has 49 places, 28 transitions, 123 flow [2023-08-24 13:50:41,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=28} [2023-08-24 13:50:41,006 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2023-08-24 13:50:41,006 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 28 transitions, 123 flow [2023-08-24 13:50:41,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 269.0) internal successors, (2152), 8 states have internal predecessors, (2152), 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) [2023-08-24 13:50:41,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 13:50:41,007 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] [2023-08-24 13:50:41,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-24 13:50:41,007 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 13:50:41,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 13:50:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1179001526, now seen corresponding path program 4 times [2023-08-24 13:50:41,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 13:50:41,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555813036] [2023-08-24 13:50:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 13:50:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 13:50:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 13:50:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 13:50:41,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 13:50:41,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555813036] [2023-08-24 13:50:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555813036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 13:50:41,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 13:50:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-24 13:50:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988916208] [2023-08-24 13:50:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 13:50:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 13:50:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 13:50:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 13:50:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-24 13:50:41,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 745 [2023-08-24 13:50:41,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 28 transitions, 123 flow. Second operand has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 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) [2023-08-24 13:50:41,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 13:50:41,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 745 [2023-08-24 13:50:41,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 13:50:42,003 INFO L124 PetriNetUnfolderBase]: 7/33 cut-off events. [2023-08-24 13:50:42,003 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-24 13:50:42,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 33 events. 7/33 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 120. Up to 10 conditions per place. [2023-08-24 13:50:42,004 INFO L140 encePairwiseOnDemand]: 738/745 looper letters, 0 selfloop transitions, 0 changer transitions 30/30 dead transitions. [2023-08-24 13:50:42,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 30 transitions, 186 flow [2023-08-24 13:50:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 13:50:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 13:50:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1987 transitions. [2023-08-24 13:50:42,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33338926174496647 [2023-08-24 13:50:42,007 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1987 transitions. [2023-08-24 13:50:42,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1987 transitions. [2023-08-24 13:50:42,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 13:50:42,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1987 transitions. [2023-08-24 13:50:42,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 248.375) internal successors, (1987), 8 states have internal predecessors, (1987), 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) [2023-08-24 13:50:42,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:42,015 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 745.0) internal successors, (6705), 9 states have internal predecessors, (6705), 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) [2023-08-24 13:50:42,015 INFO L175 Difference]: Start difference. First operand has 49 places, 28 transitions, 123 flow. Second operand 8 states and 1987 transitions. [2023-08-24 13:50:42,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 30 transitions, 186 flow [2023-08-24 13:50:42,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 30 transitions, 160 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-08-24 13:50:42,016 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2023-08-24 13:50:42,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=745, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2023-08-24 13:50:42,016 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2023-08-24 13:50:42,016 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2023-08-24 13:50:42,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 247.0) internal successors, (2964), 12 states have internal predecessors, (2964), 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) [2023-08-24 13:50:42,019 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 13:50:42,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 13:50:42,020 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 13:50:42,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-24 13:50:42,020 INFO L445 BasicCegarLoop]: Path program histogram: [10, 9, 4, 1, 1, 1, 1, 1] [2023-08-24 13:50:42,023 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 13:50:42,024 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 13:50:42,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 01:50:42 BasicIcfg [2023-08-24 13:50:42,026 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 13:50:42,026 INFO L158 Benchmark]: Toolchain (without parser) took 38287.85ms. Allocated memory was 369.1MB in the beginning and 792.7MB in the end (delta: 423.6MB). Free memory was 345.6MB in the beginning and 415.6MB in the end (delta: -70.0MB). Peak memory consumption was 355.9MB. Max. memory is 16.0GB. [2023-08-24 13:50:42,027 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 369.1MB. Free memory is still 346.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 13:50:42,027 INFO L158 Benchmark]: CACSL2BoogieTranslator took 316.99ms. Allocated memory is still 369.1MB. Free memory was 345.1MB in the beginning and 332.8MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 13:50:42,027 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.29ms. Allocated memory is still 369.1MB. Free memory was 332.8MB in the beginning and 330.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 13:50:42,027 INFO L158 Benchmark]: Boogie Preprocessor took 33.63ms. Allocated memory is still 369.1MB. Free memory was 330.2MB in the beginning and 328.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 13:50:42,027 INFO L158 Benchmark]: RCFGBuilder took 725.30ms. Allocated memory is still 369.1MB. Free memory was 328.1MB in the beginning and 301.8MB in the end (delta: 26.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-24 13:50:42,028 INFO L158 Benchmark]: TraceAbstraction took 37137.35ms. Allocated memory was 369.1MB in the beginning and 792.7MB in the end (delta: 423.6MB). Free memory was 301.3MB in the beginning and 415.6MB in the end (delta: -114.3MB). Peak memory consumption was 311.9MB. Max. memory is 16.0GB. [2023-08-24 13:50:42,032 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 369.1MB. Free memory is still 346.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 316.99ms. Allocated memory is still 369.1MB. Free memory was 345.1MB in the beginning and 332.8MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 67.29ms. Allocated memory is still 369.1MB. Free memory was 332.8MB in the beginning and 330.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.63ms. Allocated memory is still 369.1MB. Free memory was 330.2MB in the beginning and 328.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 725.30ms. Allocated memory is still 369.1MB. Free memory was 328.1MB in the beginning and 301.8MB in the end (delta: 26.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 37137.35ms. Allocated memory was 369.1MB in the beginning and 792.7MB in the end (delta: 423.6MB). Free memory was 301.3MB in the beginning and 415.6MB in the end (delta: -114.3MB). Peak memory consumption was 311.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11.1s, 316 PlacesBefore, 27 PlacesAfterwards, 337 TransitionsBefore, 26 TransitionsAfterwards, 6048 CoEnabledTransitionPairs, 8 FixpointIterations, 202 TrivialSequentialCompositions, 95 ConcurrentSequentialCompositions, 53 TrivialYvCompositions, 26 ConcurrentYvCompositions, 22 ChoiceCompositions, 398 TotalNumberOfCompositions, 6619 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6038, independent: 5944, independent conditional: 0, independent unconditional: 5944, dependent: 94, dependent conditional: 0, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3610, independent: 3586, independent conditional: 0, independent unconditional: 3586, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6038, independent: 2358, independent conditional: 0, independent unconditional: 2358, dependent: 70, dependent conditional: 0, dependent unconditional: 70, unknown: 3610, unknown conditional: 0, unknown unconditional: 3610] , Statistics on independence cache: Total cache size (in pairs): 34, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 93]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 412 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 36.9s, OverallIterations: 28, TraceHistogramMax: 1, PathProgramHistogramMax: 10, EmptinessCheckTime: 0.0s, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 11.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1191 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1191 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 71 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4474 IncrementalHoareTripleChecker+Invalid, 4545 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 71 mSolverCounterUnsat, 0 mSDtfsCounter, 4474 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 264 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=889occurred in iteration=18, InterpolantAutomatonStates: 183, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 633 NumberOfCodeBlocks, 633 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 605 ConstructedInterpolants, 0 QuantifiedInterpolants, 8524 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 PerfectInterpolantSequences, 98/98 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 13:50:42,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...