/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-node-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:54:56,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:54:56,238 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 11:54:56,269 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:54:56,271 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:54:56,271 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:54:56,272 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:54:56,272 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:54:56,273 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:54:56,276 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:54:56,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:54:56,277 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:54:56,277 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:54:56,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:54:56,279 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:54:56,279 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:54:56,279 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:54:56,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:54:56,279 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:54:56,280 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:54:56,280 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:54:56,281 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:54:56,281 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:54:56,281 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:54:56,282 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:54:56,283 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:54:56,283 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:54:56,283 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:54:56,283 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:54:56,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:54:56,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:54:56,285 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:54:56,285 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:54:56,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:54:56,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:54:56,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:54:56,553 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:54:56,554 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:54:56,554 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-11-17 11:54:57,763 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:54:57,944 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:54:57,946 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-node-subst.wvr.c [2023-11-17 11:54:57,953 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4e6efd52/18b9b06b8d844abd88915fde6fd23ca8/FLAG66704693a [2023-11-17 11:54:57,965 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b4e6efd52/18b9b06b8d844abd88915fde6fd23ca8 [2023-11-17 11:54:57,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:54:57,967 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:54:57,968 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:54:57,968 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:54:57,971 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:54:57,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:54:57" (1/1) ... [2023-11-17 11:54:57,973 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2918c590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:57, skipping insertion in model container [2023-11-17 11:54:57,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:54:57" (1/1) ... [2023-11-17 11:54:57,996 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:54:58,154 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-subst.wvr.c[4035,4048] [2023-11-17 11:54:58,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:54:58,174 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:54:58,199 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-subst.wvr.c[4035,4048] [2023-11-17 11:54:58,205 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:54:58,222 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:54:58,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58 WrapperNode [2023-11-17 11:54:58,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:54:58,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:54:58,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:54:58,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:54:58,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,237 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,275 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 22, calls inlined = 34, statements flattened = 439 [2023-11-17 11:54:58,275 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:54:58,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:54:58,276 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:54:58,276 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:54:58,287 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,294 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,294 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,305 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,310 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,313 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,315 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,319 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:54:58,321 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:54:58,321 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:54:58,321 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:54:58,322 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (1/1) ... [2023-11-17 11:54:58,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:54:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:58,362 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 11:54:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:54:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:54:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:54:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:54:58,400 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 11:54:58,400 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 11:54:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 11:54:58,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 11:54:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 11:54:58,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 11:54:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:54:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 11:54:58,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:54:58,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:54:58,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:54:58,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 11:54:58,404 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 11:54:58,564 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:54:58,566 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:54:59,178 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:54:59,708 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:54:59,708 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 11:54:59,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:54:59 BoogieIcfgContainer [2023-11-17 11:54:59,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:54:59,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:54:59,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:54:59,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:54:59,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:54:57" (1/3) ... [2023-11-17 11:54:59,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1326e9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:54:59, skipping insertion in model container [2023-11-17 11:54:59,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:58" (2/3) ... [2023-11-17 11:54:59,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1326e9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:54:59, skipping insertion in model container [2023-11-17 11:54:59,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:54:59" (3/3) ... [2023-11-17 11:54:59,719 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-subst.wvr.c [2023-11-17 11:54:59,735 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:54:59,735 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:54:59,735 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:54:59,806 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:54:59,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2023-11-17 11:54:59,878 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-11-17 11:54:59,878 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:54:59,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-17 11:54:59,882 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2023-11-17 11:54:59,889 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2023-11-17 11:54:59,892 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:54:59,907 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 29 transitions, 76 flow [2023-11-17 11:54:59,909 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 29 transitions, 76 flow [2023-11-17 11:54:59,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 76 flow [2023-11-17 11:54:59,956 INFO L124 PetriNetUnfolderBase]: 6/29 cut-off events. [2023-11-17 11:54:59,957 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:54:59,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 29 events. 6/29 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 12 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2023-11-17 11:54:59,957 INFO L119 LiptonReduction]: Number of co-enabled transitions 36 [2023-11-17 11:55:00,072 INFO L134 LiptonReduction]: Checked pairs total: 72 [2023-11-17 11:55:00,072 INFO L136 LiptonReduction]: Total number of compositions: 1 [2023-11-17 11:55:00,091 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:55:00,098 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6766772d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:55:00,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:55:00,114 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:55:00,114 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-17 11:55:00,114 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:55:00,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:00,115 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] [2023-11-17 11:55:00,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:00,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:00,120 INFO L85 PathProgramCache]: Analyzing trace with hash -761023605, now seen corresponding path program 1 times [2023-11-17 11:55:00,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:00,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114814561] [2023-11-17 11:55:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:00,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:00,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:55:00,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:00,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114814561] [2023-11-17 11:55:00,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114814561] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:00,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:00,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:55:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164435786] [2023-11-17 11:55:00,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:00,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:55:00,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:00,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:55:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:55:00,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:00,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:00,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:00,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:00,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:00,846 INFO L124 PetriNetUnfolderBase]: 43/93 cut-off events. [2023-11-17 11:55:00,846 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 11:55:00,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 93 events. 43/93 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 157 event pairs, 37 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 120. Up to 93 conditions per place. [2023-11-17 11:55:00,850 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 27 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2023-11-17 11:55:00,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 29 transitions, 134 flow [2023-11-17 11:55:00,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:55:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:55:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-17 11:55:00,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2023-11-17 11:55:00,862 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-17 11:55:00,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-17 11:55:00,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:00,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-17 11:55:00,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:00,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:00,871 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:00,873 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 42 transitions. [2023-11-17 11:55:00,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 29 transitions, 134 flow [2023-11-17 11:55:00,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 29 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 11:55:00,879 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 74 flow [2023-11-17 11:55:00,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-11-17 11:55:00,884 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-17 11:55:00,884 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 74 flow [2023-11-17 11:55:00,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:00,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:00,885 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] [2023-11-17 11:55:00,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:55:00,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:00,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash -796094052, now seen corresponding path program 1 times [2023-11-17 11:55:00,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:00,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518102267] [2023-11-17 11:55:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:00,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:01,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 11:55:01,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:01,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518102267] [2023-11-17 11:55:01,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518102267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:01,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:01,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:55:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734806450] [2023-11-17 11:55:01,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:01,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:55:01,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:01,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:55:01,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:55:01,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:01,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:01,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:01,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:01,280 INFO L124 PetriNetUnfolderBase]: 43/94 cut-off events. [2023-11-17 11:55:01,280 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:55:01,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204 conditions, 94 events. 43/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 158 event pairs, 37 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 193. Up to 92 conditions per place. [2023-11-17 11:55:01,282 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 26 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2023-11-17 11:55:01,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 30 transitions, 136 flow [2023-11-17 11:55:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:55:01,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:55:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2023-11-17 11:55:01,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34558823529411764 [2023-11-17 11:55:01,283 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 47 transitions. [2023-11-17 11:55:01,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 47 transitions. [2023-11-17 11:55:01,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:01,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 47 transitions. [2023-11-17 11:55:01,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,285 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,286 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 74 flow. Second operand 4 states and 47 transitions. [2023-11-17 11:55:01,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 30 transitions, 136 flow [2023-11-17 11:55:01,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 30 transitions, 132 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:55:01,287 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 88 flow [2023-11-17 11:55:01,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-11-17 11:55:01,288 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-11-17 11:55:01,288 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 88 flow [2023-11-17 11:55:01,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:01,289 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] [2023-11-17 11:55:01,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:55:01,289 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:01,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:01,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2111763527, now seen corresponding path program 1 times [2023-11-17 11:55:01,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:01,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779518768] [2023-11-17 11:55:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:01,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 11:55:01,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:01,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779518768] [2023-11-17 11:55:01,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779518768] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:01,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:01,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:55:01,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445995637] [2023-11-17 11:55:01,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:01,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:55:01,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:01,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:55:01,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:55:01,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:01,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:01,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:01,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:01,584 INFO L124 PetriNetUnfolderBase]: 43/95 cut-off events. [2023-11-17 11:55:01,584 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 11:55:01,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 95 events. 43/95 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 158 event pairs, 37 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 193. Up to 93 conditions per place. [2023-11-17 11:55:01,586 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 27 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2023-11-17 11:55:01,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 152 flow [2023-11-17 11:55:01,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:55:01,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:55:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 47 transitions. [2023-11-17 11:55:01,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34558823529411764 [2023-11-17 11:55:01,587 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 47 transitions. [2023-11-17 11:55:01,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 47 transitions. [2023-11-17 11:55:01,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:01,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 47 transitions. [2023-11-17 11:55:01,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,590 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,590 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 88 flow. Second operand 4 states and 47 transitions. [2023-11-17 11:55:01,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 152 flow [2023-11-17 11:55:01,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:55:01,592 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 105 flow [2023-11-17 11:55:01,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-11-17 11:55:01,593 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-11-17 11:55:01,593 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 105 flow [2023-11-17 11:55:01,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:01,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:55:01,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:01,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:01,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1376416146, now seen corresponding path program 1 times [2023-11-17 11:55:01,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:01,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178738857] [2023-11-17 11:55:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:01,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:55:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178738857] [2023-11-17 11:55:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178738857] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:01,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:55:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830045395] [2023-11-17 11:55:01,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:01,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:55:01,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:55:01,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:55:01,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:01,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:01,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:01,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:01,913 INFO L124 PetriNetUnfolderBase]: 43/96 cut-off events. [2023-11-17 11:55:01,914 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:55:01,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 96 events. 43/96 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 158 event pairs, 37 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 200. Up to 95 conditions per place. [2023-11-17 11:55:01,915 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 29 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2023-11-17 11:55:01,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 171 flow [2023-11-17 11:55:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:55:01,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:55:01,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-17 11:55:01,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382352941176471 [2023-11-17 11:55:01,916 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-17 11:55:01,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-17 11:55:01,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:01,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-17 11:55:01,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,918 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,918 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 105 flow. Second operand 4 states and 46 transitions. [2023-11-17 11:55:01,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 171 flow [2023-11-17 11:55:01,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 167 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:55:01,920 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 115 flow [2023-11-17 11:55:01,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-17 11:55:01,921 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-11-17 11:55:01,921 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 115 flow [2023-11-17 11:55:01,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:01,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:01,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:55:01,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:01,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:01,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1163564029, now seen corresponding path program 1 times [2023-11-17 11:55:01,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:01,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946350586] [2023-11-17 11:55:01,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:01,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 11:55:02,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:02,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946350586] [2023-11-17 11:55:02,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946350586] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:02,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:02,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:55:02,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318640808] [2023-11-17 11:55:02,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:02,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:55:02,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:02,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:55:02,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:55:02,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:02,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:02,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:02,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:02,215 INFO L124 PetriNetUnfolderBase]: 43/97 cut-off events. [2023-11-17 11:55:02,216 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:55:02,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 97 events. 43/97 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 158 event pairs, 37 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 206. Up to 96 conditions per place. [2023-11-17 11:55:02,217 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 30 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-11-17 11:55:02,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 33 transitions, 183 flow [2023-11-17 11:55:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:55:02,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:55:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-17 11:55:02,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382352941176471 [2023-11-17 11:55:02,218 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-17 11:55:02,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-17 11:55:02,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:02,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-17 11:55:02,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,220 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,220 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,220 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 115 flow. Second operand 4 states and 46 transitions. [2023-11-17 11:55:02,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 33 transitions, 183 flow [2023-11-17 11:55:02,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 33 transitions, 177 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 11:55:02,222 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 123 flow [2023-11-17 11:55:02,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-11-17 11:55:02,222 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-11-17 11:55:02,223 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 123 flow [2023-11-17 11:55:02,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:02,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:02,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 11:55:02,223 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:02,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash -394982038, now seen corresponding path program 1 times [2023-11-17 11:55:02,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:02,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441214373] [2023-11-17 11:55:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:02,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-17 11:55:02,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:02,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441214373] [2023-11-17 11:55:02,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441214373] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:02,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:02,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:55:02,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742905731] [2023-11-17 11:55:02,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:55:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:55:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:55:02,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:02,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:02,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:02,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:02,518 INFO L124 PetriNetUnfolderBase]: 43/98 cut-off events. [2023-11-17 11:55:02,518 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-17 11:55:02,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 98 events. 43/98 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 158 event pairs, 37 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 211. Up to 97 conditions per place. [2023-11-17 11:55:02,519 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 31 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-11-17 11:55:02,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 193 flow [2023-11-17 11:55:02,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:55:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:55:02,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 46 transitions. [2023-11-17 11:55:02,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3382352941176471 [2023-11-17 11:55:02,521 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 46 transitions. [2023-11-17 11:55:02,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 46 transitions. [2023-11-17 11:55:02,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:02,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 46 transitions. [2023-11-17 11:55:02,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,522 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,522 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 123 flow. Second operand 4 states and 46 transitions. [2023-11-17 11:55:02,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 193 flow [2023-11-17 11:55:02,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 187 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 11:55:02,526 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 131 flow [2023-11-17 11:55:02,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-11-17 11:55:02,528 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 9 predicate places. [2023-11-17 11:55:02,528 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 131 flow [2023-11-17 11:55:02,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:02,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:02,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 11:55:02,529 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:02,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:02,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1982506749, now seen corresponding path program 1 times [2023-11-17 11:55:02,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451841013] [2023-11-17 11:55:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:02,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:05,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:05,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451841013] [2023-11-17 11:55:05,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451841013] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:05,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:05,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 11:55:05,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532771541] [2023-11-17 11:55:05,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:05,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 11:55:05,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:05,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 11:55:05,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:55:05,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:06,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 131 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:06,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:06,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:06,382 INFO L124 PetriNetUnfolderBase]: 46/124 cut-off events. [2023-11-17 11:55:06,382 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-11-17 11:55:06,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294 conditions, 124 events. 46/124 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 353 event pairs, 7 based on Foata normal form. 1/124 useless extension candidates. Maximal degree in co-relation 267. Up to 49 conditions per place. [2023-11-17 11:55:06,384 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 44 selfloop transitions, 5 changer transitions 8/57 dead transitions. [2023-11-17 11:55:06,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 57 transitions, 300 flow [2023-11-17 11:55:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:55:06,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:55:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2023-11-17 11:55:06,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33613445378151263 [2023-11-17 11:55:06,385 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 80 transitions. [2023-11-17 11:55:06,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 80 transitions. [2023-11-17 11:55:06,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:06,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 80 transitions. [2023-11-17 11:55:06,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,388 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,388 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 131 flow. Second operand 7 states and 80 transitions. [2023-11-17 11:55:06,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 57 transitions, 300 flow [2023-11-17 11:55:06,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 294 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 11:55:06,391 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 152 flow [2023-11-17 11:55:06,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=152, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-11-17 11:55:06,393 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-11-17 11:55:06,393 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 152 flow [2023-11-17 11:55:06,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:06,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:06,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:55:06,395 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:06,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:06,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1331036715, now seen corresponding path program 2 times [2023-11-17 11:55:06,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:06,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545079930] [2023-11-17 11:55:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:06,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:09,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:09,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545079930] [2023-11-17 11:55:09,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545079930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:09,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:09,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:55:09,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530294095] [2023-11-17 11:55:09,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:09,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:55:09,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:09,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:55:09,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:55:09,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:09,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:09,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:09,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:09,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:10,105 INFO L124 PetriNetUnfolderBase]: 49/157 cut-off events. [2023-11-17 11:55:10,105 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-11-17 11:55:10,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 157 events. 49/157 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 547 event pairs, 21 based on Foata normal form. 1/157 useless extension candidates. Maximal degree in co-relation 419. Up to 83 conditions per place. [2023-11-17 11:55:10,109 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 49 selfloop transitions, 5 changer transitions 7/61 dead transitions. [2023-11-17 11:55:10,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 348 flow [2023-11-17 11:55:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:55:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:55:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 74 transitions. [2023-11-17 11:55:10,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43529411764705883 [2023-11-17 11:55:10,111 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 74 transitions. [2023-11-17 11:55:10,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 74 transitions. [2023-11-17 11:55:10,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:10,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 74 transitions. [2023-11-17 11:55:10,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:10,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:10,116 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:10,116 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 152 flow. Second operand 5 states and 74 transitions. [2023-11-17 11:55:10,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 348 flow [2023-11-17 11:55:10,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 335 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-17 11:55:10,121 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 177 flow [2023-11-17 11:55:10,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-11-17 11:55:10,124 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 18 predicate places. [2023-11-17 11:55:10,124 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 177 flow [2023-11-17 11:55:10,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:10,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:10,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:10,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:55:10,124 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:10,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:10,125 INFO L85 PathProgramCache]: Analyzing trace with hash 13098059, now seen corresponding path program 3 times [2023-11-17 11:55:10,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:10,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477468747] [2023-11-17 11:55:10,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:10,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:12,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:12,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477468747] [2023-11-17 11:55:12,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477468747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:12,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:12,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 11:55:12,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496742200] [2023-11-17 11:55:12,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:12,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 11:55:12,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 11:55:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:55:12,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:12,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 177 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:12,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:12,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:12,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:12,691 INFO L124 PetriNetUnfolderBase]: 63/225 cut-off events. [2023-11-17 11:55:12,691 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2023-11-17 11:55:12,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 725 conditions, 225 events. 63/225 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1063 event pairs, 25 based on Foata normal form. 1/225 useless extension candidates. Maximal degree in co-relation 694. Up to 94 conditions per place. [2023-11-17 11:55:12,693 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 53 selfloop transitions, 6 changer transitions 9/68 dead transitions. [2023-11-17 11:55:12,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 68 transitions, 428 flow [2023-11-17 11:55:12,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:55:12,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:55:12,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 84 transitions. [2023-11-17 11:55:12,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35294117647058826 [2023-11-17 11:55:12,695 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 84 transitions. [2023-11-17 11:55:12,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 84 transitions. [2023-11-17 11:55:12,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:12,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 84 transitions. [2023-11-17 11:55:12,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:12,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:12,697 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:12,697 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 177 flow. Second operand 7 states and 84 transitions. [2023-11-17 11:55:12,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 68 transitions, 428 flow [2023-11-17 11:55:12,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 68 transitions, 406 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 11:55:12,701 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 199 flow [2023-11-17 11:55:12,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=199, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-11-17 11:55:12,701 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2023-11-17 11:55:12,702 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 199 flow [2023-11-17 11:55:12,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:12,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:12,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:12,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:55:12,705 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:12,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:12,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1638413389, now seen corresponding path program 4 times [2023-11-17 11:55:12,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:12,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102342195] [2023-11-17 11:55:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:12,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:12,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:15,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:15,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102342195] [2023-11-17 11:55:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102342195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:15,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:15,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:55:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883734833] [2023-11-17 11:55:15,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:15,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:55:15,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:55:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:55:15,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:15,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:15,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:15,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:15,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:15,649 INFO L124 PetriNetUnfolderBase]: 59/211 cut-off events. [2023-11-17 11:55:15,649 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2023-11-17 11:55:15,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 211 events. 59/211 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 924 event pairs, 19 based on Foata normal form. 1/211 useless extension candidates. Maximal degree in co-relation 705. Up to 106 conditions per place. [2023-11-17 11:55:15,651 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 50 selfloop transitions, 4 changer transitions 8/62 dead transitions. [2023-11-17 11:55:15,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 403 flow [2023-11-17 11:55:15,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:55:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:55:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 70 transitions. [2023-11-17 11:55:15,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117647058823529 [2023-11-17 11:55:15,653 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 70 transitions. [2023-11-17 11:55:15,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 70 transitions. [2023-11-17 11:55:15,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:15,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 70 transitions. [2023-11-17 11:55:15,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:15,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:15,655 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:15,656 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 199 flow. Second operand 5 states and 70 transitions. [2023-11-17 11:55:15,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 403 flow [2023-11-17 11:55:15,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 384 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-11-17 11:55:15,659 INFO L231 Difference]: Finished difference. Result has 57 places, 41 transitions, 219 flow [2023-11-17 11:55:15,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=57, PETRI_TRANSITIONS=41} [2023-11-17 11:55:15,660 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2023-11-17 11:55:15,660 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 41 transitions, 219 flow [2023-11-17 11:55:15,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:15,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:15,661 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, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:15,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-17 11:55:15,661 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:15,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:15,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1367526521, now seen corresponding path program 5 times [2023-11-17 11:55:15,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:15,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139984313] [2023-11-17 11:55:15,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:15,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:18,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:18,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139984313] [2023-11-17 11:55:18,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139984313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:18,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:18,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:55:18,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684451091] [2023-11-17 11:55:18,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:18,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:55:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:55:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:55:18,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:18,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 41 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:18,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:18,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:18,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:18,406 INFO L124 PetriNetUnfolderBase]: 57/199 cut-off events. [2023-11-17 11:55:18,407 INFO L125 PetriNetUnfolderBase]: For 768/768 co-relation queries the response was YES. [2023-11-17 11:55:18,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 764 conditions, 199 events. 57/199 cut-off events. For 768/768 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 845 event pairs, 26 based on Foata normal form. 1/199 useless extension candidates. Maximal degree in co-relation 732. Up to 126 conditions per place. [2023-11-17 11:55:18,408 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 42 selfloop transitions, 7 changer transitions 14/63 dead transitions. [2023-11-17 11:55:18,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 411 flow [2023-11-17 11:55:18,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:55:18,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:55:18,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 73 transitions. [2023-11-17 11:55:18,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4294117647058823 [2023-11-17 11:55:18,410 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 73 transitions. [2023-11-17 11:55:18,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 73 transitions. [2023-11-17 11:55:18,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:18,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 73 transitions. [2023-11-17 11:55:18,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:18,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:18,411 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:18,411 INFO L175 Difference]: Start difference. First operand has 57 places, 41 transitions, 219 flow. Second operand 5 states and 73 transitions. [2023-11-17 11:55:18,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 411 flow [2023-11-17 11:55:18,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 397 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 11:55:18,414 INFO L231 Difference]: Finished difference. Result has 59 places, 42 transitions, 232 flow [2023-11-17 11:55:18,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=232, PETRI_PLACES=59, PETRI_TRANSITIONS=42} [2023-11-17 11:55:18,415 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2023-11-17 11:55:18,415 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 42 transitions, 232 flow [2023-11-17 11:55:18,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:18,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:18,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:18,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 11:55:18,416 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:18,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:18,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1944108197, now seen corresponding path program 6 times [2023-11-17 11:55:18,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:18,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104877308] [2023-11-17 11:55:18,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:18,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:21,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:21,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104877308] [2023-11-17 11:55:21,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104877308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:21,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:21,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 11:55:21,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866731011] [2023-11-17 11:55:21,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:21,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 11:55:21,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:21,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 11:55:21,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-17 11:55:21,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:21,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:21,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:21,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:21,640 INFO L124 PetriNetUnfolderBase]: 52/186 cut-off events. [2023-11-17 11:55:21,640 INFO L125 PetriNetUnfolderBase]: For 691/691 co-relation queries the response was YES. [2023-11-17 11:55:21,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 186 events. 52/186 cut-off events. For 691/691 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 772 event pairs, 12 based on Foata normal form. 1/186 useless extension candidates. Maximal degree in co-relation 695. Up to 83 conditions per place. [2023-11-17 11:55:21,642 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 48 selfloop transitions, 7 changer transitions 8/63 dead transitions. [2023-11-17 11:55:21,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 436 flow [2023-11-17 11:55:21,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:55:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:55:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2023-11-17 11:55:21,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277310924369748 [2023-11-17 11:55:21,643 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 78 transitions. [2023-11-17 11:55:21,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 78 transitions. [2023-11-17 11:55:21,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:21,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 78 transitions. [2023-11-17 11:55:21,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,645 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,645 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 232 flow. Second operand 7 states and 78 transitions. [2023-11-17 11:55:21,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 436 flow [2023-11-17 11:55:21,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 418 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 11:55:21,653 INFO L231 Difference]: Finished difference. Result has 63 places, 43 transitions, 251 flow [2023-11-17 11:55:21,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=251, PETRI_PLACES=63, PETRI_TRANSITIONS=43} [2023-11-17 11:55:21,654 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 31 predicate places. [2023-11-17 11:55:21,654 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 43 transitions, 251 flow [2023-11-17 11:55:21,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:21,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:21,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:55:21,655 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:21,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:21,655 INFO L85 PathProgramCache]: Analyzing trace with hash 26897641, now seen corresponding path program 7 times [2023-11-17 11:55:21,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:21,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549272465] [2023-11-17 11:55:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:21,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:24,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:24,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549272465] [2023-11-17 11:55:24,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549272465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:24,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:24,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:55:24,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525437035] [2023-11-17 11:55:24,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:24,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:55:24,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:55:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:55:24,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:24,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 43 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:24,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:24,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:24,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:24,369 INFO L124 PetriNetUnfolderBase]: 48/170 cut-off events. [2023-11-17 11:55:24,369 INFO L125 PetriNetUnfolderBase]: For 951/951 co-relation queries the response was YES. [2023-11-17 11:55:24,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 170 events. 48/170 cut-off events. For 951/951 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 653 event pairs, 18 based on Foata normal form. 1/170 useless extension candidates. Maximal degree in co-relation 685. Up to 106 conditions per place. [2023-11-17 11:55:24,370 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 45 selfloop transitions, 3 changer transitions 11/59 dead transitions. [2023-11-17 11:55:24,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 430 flow [2023-11-17 11:55:24,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:55:24,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:55:24,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 66 transitions. [2023-11-17 11:55:24,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38823529411764707 [2023-11-17 11:55:24,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 66 transitions. [2023-11-17 11:55:24,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 66 transitions. [2023-11-17 11:55:24,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:24,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 66 transitions. [2023-11-17 11:55:24,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:24,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:24,373 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:24,373 INFO L175 Difference]: Start difference. First operand has 63 places, 43 transitions, 251 flow. Second operand 5 states and 66 transitions. [2023-11-17 11:55:24,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 430 flow [2023-11-17 11:55:24,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 415 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-11-17 11:55:24,376 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 254 flow [2023-11-17 11:55:24,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-11-17 11:55:24,377 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-11-17 11:55:24,378 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 254 flow [2023-11-17 11:55:24,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:24,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:24,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:24,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:55:24,378 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:24,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:24,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1907618391, now seen corresponding path program 8 times [2023-11-17 11:55:24,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:24,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356968609] [2023-11-17 11:55:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:24,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:26,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:26,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:26,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356968609] [2023-11-17 11:55:26,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356968609] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:26,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:26,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 11:55:26,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192185887] [2023-11-17 11:55:26,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:26,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 11:55:26,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 11:55:26,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-17 11:55:26,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:26,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 254 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:26,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:26,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:26,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:27,383 INFO L124 PetriNetUnfolderBase]: 48/173 cut-off events. [2023-11-17 11:55:27,383 INFO L125 PetriNetUnfolderBase]: For 1106/1106 co-relation queries the response was YES. [2023-11-17 11:55:27,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 754 conditions, 173 events. 48/173 cut-off events. For 1106/1106 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 686 event pairs, 19 based on Foata normal form. 1/173 useless extension candidates. Maximal degree in co-relation 725. Up to 88 conditions per place. [2023-11-17 11:55:27,388 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 39 selfloop transitions, 7 changer transitions 15/61 dead transitions. [2023-11-17 11:55:27,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 444 flow [2023-11-17 11:55:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:55:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:55:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 78 transitions. [2023-11-17 11:55:27,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3277310924369748 [2023-11-17 11:55:27,390 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 78 transitions. [2023-11-17 11:55:27,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 78 transitions. [2023-11-17 11:55:27,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:27,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 78 transitions. [2023-11-17 11:55:27,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:27,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:27,391 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:27,392 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 254 flow. Second operand 7 states and 78 transitions. [2023-11-17 11:55:27,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 444 flow [2023-11-17 11:55:27,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 61 transitions, 429 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-17 11:55:27,395 INFO L231 Difference]: Finished difference. Result has 67 places, 42 transitions, 263 flow [2023-11-17 11:55:27,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=263, PETRI_PLACES=67, PETRI_TRANSITIONS=42} [2023-11-17 11:55:27,395 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2023-11-17 11:55:27,395 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 42 transitions, 263 flow [2023-11-17 11:55:27,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:27,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:27,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:27,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 11:55:27,396 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:27,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash -729386427, now seen corresponding path program 9 times [2023-11-17 11:55:27,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:27,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172389206] [2023-11-17 11:55:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:27,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:32,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:32,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:32,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172389206] [2023-11-17 11:55:32,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172389206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:32,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:32,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-17 11:55:32,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870738397] [2023-11-17 11:55:32,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:32,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:55:32,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:32,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:55:32,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:55:32,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:32,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 42 transitions, 263 flow. Second operand has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:32,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:32,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:32,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:32,621 INFO L124 PetriNetUnfolderBase]: 47/179 cut-off events. [2023-11-17 11:55:32,621 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2023-11-17 11:55:32,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 179 events. 47/179 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 737 event pairs, 27 based on Foata normal form. 1/179 useless extension candidates. Maximal degree in co-relation 778. Up to 109 conditions per place. [2023-11-17 11:55:32,622 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 35 selfloop transitions, 7 changer transitions 29/71 dead transitions. [2023-11-17 11:55:32,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 513 flow [2023-11-17 11:55:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 11:55:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 11:55:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2023-11-17 11:55:32,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3104575163398693 [2023-11-17 11:55:32,624 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 95 transitions. [2023-11-17 11:55:32,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 95 transitions. [2023-11-17 11:55:32,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:32,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 95 transitions. [2023-11-17 11:55:32,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:32,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:32,625 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:32,625 INFO L175 Difference]: Start difference. First operand has 67 places, 42 transitions, 263 flow. Second operand 9 states and 95 transitions. [2023-11-17 11:55:32,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 513 flow [2023-11-17 11:55:32,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 71 transitions, 475 flow, removed 4 selfloop flow, removed 9 redundant places. [2023-11-17 11:55:32,628 INFO L231 Difference]: Finished difference. Result has 69 places, 42 transitions, 261 flow [2023-11-17 11:55:32,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=261, PETRI_PLACES=69, PETRI_TRANSITIONS=42} [2023-11-17 11:55:32,629 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2023-11-17 11:55:32,629 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 42 transitions, 261 flow [2023-11-17 11:55:32,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.153846153846154) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:32,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:32,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:32,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 11:55:32,630 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:32,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:32,630 INFO L85 PathProgramCache]: Analyzing trace with hash -466083743, now seen corresponding path program 10 times [2023-11-17 11:55:32,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:32,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092294343] [2023-11-17 11:55:32,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:32,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:34,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:34,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092294343] [2023-11-17 11:55:34,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092294343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:34,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:34,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-17 11:55:34,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128385564] [2023-11-17 11:55:34,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:34,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 11:55:34,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 11:55:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-17 11:55:34,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:34,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 42 transitions, 261 flow. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:34,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:34,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:34,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:35,018 INFO L124 PetriNetUnfolderBase]: 34/131 cut-off events. [2023-11-17 11:55:35,018 INFO L125 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2023-11-17 11:55:35,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 131 events. 34/131 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 421 event pairs, 12 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 553. Up to 64 conditions per place. [2023-11-17 11:55:35,020 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 39 selfloop transitions, 5 changer transitions 24/68 dead transitions. [2023-11-17 11:55:35,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 464 flow [2023-11-17 11:55:35,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 11:55:35,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 11:55:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 91 transitions. [2023-11-17 11:55:35,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33455882352941174 [2023-11-17 11:55:35,021 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 91 transitions. [2023-11-17 11:55:35,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 91 transitions. [2023-11-17 11:55:35,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:35,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 91 transitions. [2023-11-17 11:55:35,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:35,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:35,023 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:35,023 INFO L175 Difference]: Start difference. First operand has 69 places, 42 transitions, 261 flow. Second operand 8 states and 91 transitions. [2023-11-17 11:55:35,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 464 flow [2023-11-17 11:55:35,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 68 transitions, 446 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-17 11:55:35,026 INFO L231 Difference]: Finished difference. Result has 67 places, 37 transitions, 210 flow [2023-11-17 11:55:35,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=210, PETRI_PLACES=67, PETRI_TRANSITIONS=37} [2023-11-17 11:55:35,027 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 35 predicate places. [2023-11-17 11:55:35,027 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 37 transitions, 210 flow [2023-11-17 11:55:35,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:35,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:35,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:35,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 11:55:35,027 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:35,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -995825095, now seen corresponding path program 11 times [2023-11-17 11:55:35,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:35,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34292412] [2023-11-17 11:55:35,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:35,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:35,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:37,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:37,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34292412] [2023-11-17 11:55:37,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34292412] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:37,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:37,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-17 11:55:37,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636670227] [2023-11-17 11:55:37,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:37,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 11:55:37,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 11:55:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:55:37,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:37,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 37 transitions, 210 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:37,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:37,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:37,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:37,341 INFO L124 PetriNetUnfolderBase]: 21/77 cut-off events. [2023-11-17 11:55:37,341 INFO L125 PetriNetUnfolderBase]: For 330/330 co-relation queries the response was YES. [2023-11-17 11:55:37,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344 conditions, 77 events. 21/77 cut-off events. For 330/330 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 146 event pairs, 4 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 323. Up to 27 conditions per place. [2023-11-17 11:55:37,342 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 35 selfloop transitions, 4 changer transitions 9/48 dead transitions. [2023-11-17 11:55:37,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 48 transitions, 333 flow [2023-11-17 11:55:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:55:37,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:55:37,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2023-11-17 11:55:37,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28991596638655465 [2023-11-17 11:55:37,343 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 69 transitions. [2023-11-17 11:55:37,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 69 transitions. [2023-11-17 11:55:37,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:37,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 69 transitions. [2023-11-17 11:55:37,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:37,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:37,344 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:37,344 INFO L175 Difference]: Start difference. First operand has 67 places, 37 transitions, 210 flow. Second operand 7 states and 69 transitions. [2023-11-17 11:55:37,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 48 transitions, 333 flow [2023-11-17 11:55:37,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 288 flow, removed 5 selfloop flow, removed 14 redundant places. [2023-11-17 11:55:37,350 INFO L231 Difference]: Finished difference. Result has 55 places, 34 transitions, 153 flow [2023-11-17 11:55:37,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=153, PETRI_PLACES=55, PETRI_TRANSITIONS=34} [2023-11-17 11:55:37,351 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2023-11-17 11:55:37,351 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 34 transitions, 153 flow [2023-11-17 11:55:37,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:37,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:37,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:37,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 11:55:37,351 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:37,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:37,352 INFO L85 PathProgramCache]: Analyzing trace with hash -97785307, now seen corresponding path program 12 times [2023-11-17 11:55:37,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:37,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881155791] [2023-11-17 11:55:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:37,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:39,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:39,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881155791] [2023-11-17 11:55:39,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881155791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:55:39,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:55:39,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-17 11:55:39,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377846529] [2023-11-17 11:55:39,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:55:39,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 11:55:39,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:39,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 11:55:39,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-11-17 11:55:39,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:39,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 34 transitions, 153 flow. Second operand has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:39,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:39,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:39,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:39,818 INFO L124 PetriNetUnfolderBase]: 11/43 cut-off events. [2023-11-17 11:55:39,818 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-11-17 11:55:39,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 43 events. 11/43 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 22 event pairs, 0 based on Foata normal form. 1/43 useless extension candidates. Maximal degree in co-relation 159. Up to 12 conditions per place. [2023-11-17 11:55:39,819 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 0 selfloop transitions, 0 changer transitions 38/38 dead transitions. [2023-11-17 11:55:39,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 38 transitions, 236 flow [2023-11-17 11:55:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 11:55:39,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 11:55:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 65 transitions. [2023-11-17 11:55:39,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23897058823529413 [2023-11-17 11:55:39,820 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 65 transitions. [2023-11-17 11:55:39,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 65 transitions. [2023-11-17 11:55:39,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:39,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 65 transitions. [2023-11-17 11:55:39,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 8.125) internal successors, (65), 8 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:39,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:39,822 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 34.0) internal successors, (306), 9 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:39,822 INFO L175 Difference]: Start difference. First operand has 55 places, 34 transitions, 153 flow. Second operand 8 states and 65 transitions. [2023-11-17 11:55:39,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 38 transitions, 236 flow [2023-11-17 11:55:39,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 209 flow, removed 3 selfloop flow, removed 11 redundant places. [2023-11-17 11:55:39,823 INFO L231 Difference]: Finished difference. Result has 48 places, 0 transitions, 0 flow [2023-11-17 11:55:39,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=48, PETRI_TRANSITIONS=0} [2023-11-17 11:55:39,823 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-11-17 11:55:39,823 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 0 transitions, 0 flow [2023-11-17 11:55:39,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.545454545454546) internal successors, (72), 11 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:39,826 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-17 11:55:39,826 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-17 11:55:39,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 11:55:39,828 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-17 11:55:39,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 11:55:39,829 INFO L445 BasicCegarLoop]: Path program histogram: [12, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:39,833 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 11:55:39,833 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 11:55:39,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 11:55:39 BasicIcfg [2023-11-17 11:55:39,836 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 11:55:39,837 INFO L158 Benchmark]: Toolchain (without parser) took 41869.45ms. Allocated memory was 286.3MB in the beginning and 971.0MB in the end (delta: 684.7MB). Free memory was 231.0MB in the beginning and 665.8MB in the end (delta: -434.8MB). Peak memory consumption was 251.5MB. Max. memory is 8.0GB. [2023-11-17 11:55:39,837 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 198.2MB. Free memory is still 146.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 11:55:39,837 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.29ms. Allocated memory is still 286.3MB. Free memory was 231.0MB in the beginning and 217.9MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-11-17 11:55:39,837 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.04ms. Allocated memory is still 286.3MB. Free memory was 217.3MB in the beginning and 214.2MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 11:55:39,838 INFO L158 Benchmark]: Boogie Preprocessor took 43.80ms. Allocated memory is still 286.3MB. Free memory was 214.2MB in the beginning and 211.6MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 11:55:39,838 INFO L158 Benchmark]: RCFGBuilder took 1390.19ms. Allocated memory is still 286.3MB. Free memory was 211.1MB in the beginning and 154.4MB in the end (delta: 56.6MB). Peak memory consumption was 73.4MB. Max. memory is 8.0GB. [2023-11-17 11:55:39,838 INFO L158 Benchmark]: TraceAbstraction took 40122.86ms. Allocated memory was 286.3MB in the beginning and 971.0MB in the end (delta: 684.7MB). Free memory was 153.4MB in the beginning and 665.8MB in the end (delta: -512.4MB). Peak memory consumption was 172.9MB. Max. memory is 8.0GB. [2023-11-17 11:55:39,839 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 198.2MB. Free memory is still 146.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 254.29ms. Allocated memory is still 286.3MB. Free memory was 231.0MB in the beginning and 217.9MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.04ms. Allocated memory is still 286.3MB. Free memory was 217.3MB in the beginning and 214.2MB in the end (delta: 3.1MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.80ms. Allocated memory is still 286.3MB. Free memory was 214.2MB in the beginning and 211.6MB in the end (delta: 2.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 1390.19ms. Allocated memory is still 286.3MB. Free memory was 211.1MB in the beginning and 154.4MB in the end (delta: 56.6MB). Peak memory consumption was 73.4MB. Max. memory is 8.0GB. * TraceAbstraction took 40122.86ms. Allocated memory was 286.3MB in the beginning and 971.0MB in the end (delta: 684.7MB). Free memory was 153.4MB in the beginning and 665.8MB in the end (delta: -512.4MB). Peak memory consumption was 172.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 33 PlacesBefore, 32 PlacesAfterwards, 29 TransitionsBefore, 28 TransitionsAfterwards, 36 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 72 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 54, independent: 46, independent conditional: 0, independent unconditional: 46, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 23, independent: 19, independent conditional: 0, independent unconditional: 19, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 23, independent: 19, independent conditional: 0, independent unconditional: 19, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 61, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 61, dependent conditional: 0, dependent unconditional: 61, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 54, independent: 27, independent conditional: 0, independent unconditional: 27, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 23, unknown conditional: 0, unknown unconditional: 23] , Statistics on independence cache: Total cache size (in pairs): 23, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 109]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 37 locations, 4 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: 40.0s, OverallIterations: 18, TraceHistogramMax: 1, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 663 SdHoareTripleChecker+Valid, 2.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 663 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 2.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 71 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2853 IncrementalHoareTripleChecker+Invalid, 2924 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 71 mSolverCounterUnsat, 0 mSDtfsCounter, 2853 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 158 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=263occurred in iteration=14, InterpolantAutomatonStates: 103, 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, 3.7s SatisfiabilityAnalysisTime, 30.3s InterpolantComputationTime, 483 NumberOfCodeBlocks, 483 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 465 ConstructedInterpolants, 0 QuantifiedInterpolants, 9930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 87/87 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! [2023-11-17 11:55:39,872 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...