/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:04:40,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:04:40,124 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 16:04:40,147 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:04:40,148 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:04:40,148 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:04:40,148 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:04:40,149 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:04:40,149 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:04:40,152 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:04:40,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:04:40,153 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:04:40,153 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:04:40,154 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:04:40,154 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:04:40,154 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:04:40,154 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:04:40,154 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:04:40,155 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:04:40,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:04:40,155 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:04:40,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:04:40,156 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:04:40,156 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:04:40,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:04:40,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:04:40,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:04:40,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:04:40,157 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:04:40,157 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:04:40,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:04:40,158 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:04:40,158 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:04:40,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:04:40,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:04:40,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:04:40,341 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:04:40,341 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:04:40,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-11-17 16:04:41,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:04:41,418 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:04:41,419 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-11-17 16:04:41,425 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec0efde2/847283899fbc4a6595c92b450f5db7f0/FLAG810a2393a [2023-11-17 16:04:41,438 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ec0efde2/847283899fbc4a6595c92b450f5db7f0 [2023-11-17 16:04:41,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:04:41,441 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:04:41,443 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:04:41,443 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:04:41,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:04:41,447 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,448 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba3f205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41, skipping insertion in model container [2023-11-17 16:04:41,448 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,466 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:04:41,610 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/parallel-misc-2.wvr.c[2580,2593] [2023-11-17 16:04:41,613 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:04:41,618 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:04:41,646 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/parallel-misc-2.wvr.c[2580,2593] [2023-11-17 16:04:41,646 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:04:41,653 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:04:41,653 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:04:41,658 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:04:41,659 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41 WrapperNode [2023-11-17 16:04:41,659 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:04:41,660 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:04:41,660 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:04:41,660 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:04:41,665 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,671 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,684 INFO L138 Inliner]: procedures = 21, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2023-11-17 16:04:41,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:04:41,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:04:41,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:04:41,685 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:04:41,691 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,692 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,698 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,705 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,705 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,707 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:04:41,707 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:04:41,707 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:04:41,708 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:04:41,708 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (1/1) ... [2023-11-17 16:04:41,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:04:41,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:41,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 16:04:41,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 16:04:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:04:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:04:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:04:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:04:41,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:04:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:04:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:04:41,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:04:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:04:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:04:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:04:41,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:04:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:04:41,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:04:41,758 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:04:41,837 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:04:41,839 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:04:42,040 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:04:42,057 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:04:42,057 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 16:04:42,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:04:42 BoogieIcfgContainer [2023-11-17 16:04:42,059 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:04:42,060 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:04:42,060 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:04:42,062 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:04:42,062 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:04:41" (1/3) ... [2023-11-17 16:04:42,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e56ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:04:42, skipping insertion in model container [2023-11-17 16:04:42,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:04:41" (2/3) ... [2023-11-17 16:04:42,063 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42e56ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:04:42, skipping insertion in model container [2023-11-17 16:04:42,063 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:04:42" (3/3) ... [2023-11-17 16:04:42,064 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2023-11-17 16:04:42,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:04:42,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:04:42,076 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:04:42,133 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:04:42,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 230 flow [2023-11-17 16:04:42,193 INFO L124 PetriNetUnfolderBase]: 8/106 cut-off events. [2023-11-17 16:04:42,194 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:04:42,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 106 events. 8/106 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-17 16:04:42,197 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 108 transitions, 230 flow [2023-11-17 16:04:42,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 97 transitions, 206 flow [2023-11-17 16:04:42,202 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:04:42,209 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 97 transitions, 206 flow [2023-11-17 16:04:42,211 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 97 transitions, 206 flow [2023-11-17 16:04:42,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 97 transitions, 206 flow [2023-11-17 16:04:42,228 INFO L124 PetriNetUnfolderBase]: 8/97 cut-off events. [2023-11-17 16:04:42,228 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:04:42,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 97 events. 8/97 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2023-11-17 16:04:42,230 INFO L119 LiptonReduction]: Number of co-enabled transitions 812 [2023-11-17 16:04:44,207 INFO L134 LiptonReduction]: Checked pairs total: 850 [2023-11-17 16:04:44,207 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-11-17 16:04:44,240 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:04:44,246 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;@4495e5b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:04:44,246 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:04:44,251 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:04:44,252 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 16:04:44,252 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:04:44,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:44,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:44,253 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:44,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:44,257 INFO L85 PathProgramCache]: Analyzing trace with hash 282715572, now seen corresponding path program 1 times [2023-11-17 16:04:44,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:44,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67057914] [2023-11-17 16:04:44,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:44,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:44,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:44,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67057914] [2023-11-17 16:04:44,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67057914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:44,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:44,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:04:44,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616305002] [2023-11-17 16:04:44,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:44,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:04:44,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:44,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:04:44,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:04:44,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 206 [2023-11-17 16:04:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:44,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 206 [2023-11-17 16:04:44,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:44,584 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-11-17 16:04:44,584 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-17 16:04:44,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 114 events. 65/114 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 316 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-11-17 16:04:44,586 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-11-17 16:04:44,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-11-17 16:04:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:04:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:04:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-11-17 16:04:44,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48058252427184467 [2023-11-17 16:04:44,596 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-11-17 16:04:44,597 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-11-17 16:04:44,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:44,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-11-17 16:04:44,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,604 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 206.0) internal successors, (824), 4 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,605 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 297 transitions. [2023-11-17 16:04:44,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-11-17 16:04:44,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:04:44,608 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 53 flow [2023-11-17 16:04:44,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-11-17 16:04:44,611 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-17 16:04:44,612 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 53 flow [2023-11-17 16:04:44,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:44,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:44,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:04:44,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:44,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash 358619973, now seen corresponding path program 1 times [2023-11-17 16:04:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:44,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493987429] [2023-11-17 16:04:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:44,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:44,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493987429] [2023-11-17 16:04:44,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493987429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:44,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:44,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:04:44,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28854631] [2023-11-17 16:04:44,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:44,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:04:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:04:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:04:44,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 206 [2023-11-17 16:04:44,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 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 16:04:44,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:44,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 206 [2023-11-17 16:04:44,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:44,847 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-17 16:04:44,848 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-17 16:04:44,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 126 events. 66/126 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 375 event pairs, 9 based on Foata normal form. 8/134 useless extension candidates. Maximal degree in co-relation 79. Up to 52 conditions per place. [2023-11-17 16:04:44,849 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 29 selfloop transitions, 7 changer transitions 2/40 dead transitions. [2023-11-17 16:04:44,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 40 transitions, 193 flow [2023-11-17 16:04:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:04:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:04:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 446 transitions. [2023-11-17 16:04:44,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4330097087378641 [2023-11-17 16:04:44,854 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 446 transitions. [2023-11-17 16:04:44,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 446 transitions. [2023-11-17 16:04:44,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:44,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 446 transitions. [2023-11-17 16:04:44,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 89.2) internal successors, (446), 5 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,860 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:44,860 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 53 flow. Second operand 5 states and 446 transitions. [2023-11-17 16:04:44,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 40 transitions, 193 flow [2023-11-17 16:04:44,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:04:44,861 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 106 flow [2023-11-17 16:04:44,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-11-17 16:04:44,862 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-17 16:04:44,863 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 106 flow [2023-11-17 16:04:44,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 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 16:04:44,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:44,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:44,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:04:44,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:44,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:44,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1626814145, now seen corresponding path program 2 times [2023-11-17 16:04:44,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:44,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42531859] [2023-11-17 16:04:44,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:44,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:44,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42531859] [2023-11-17 16:04:44,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42531859] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:44,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:04:44,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093360096] [2023-11-17 16:04:44,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:44,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:04:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:04:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:04:44,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 206 [2023-11-17 16:04:44,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 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 16:04:44,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:44,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 206 [2023-11-17 16:04:44,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:45,021 INFO L124 PetriNetUnfolderBase]: 59/116 cut-off events. [2023-11-17 16:04:45,022 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-11-17 16:04:45,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 116 events. 59/116 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 351 event pairs, 15 based on Foata normal form. 4/120 useless extension candidates. Maximal degree in co-relation 257. Up to 79 conditions per place. [2023-11-17 16:04:45,023 INFO L140 encePairwiseOnDemand]: 202/206 looper letters, 20 selfloop transitions, 6 changer transitions 6/34 dead transitions. [2023-11-17 16:04:45,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 211 flow [2023-11-17 16:04:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:04:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:04:45,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 356 transitions. [2023-11-17 16:04:45,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4320388349514563 [2023-11-17 16:04:45,024 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 356 transitions. [2023-11-17 16:04:45,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 356 transitions. [2023-11-17 16:04:45,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:45,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 356 transitions. [2023-11-17 16:04:45,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.0) internal successors, (356), 4 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,027 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 206.0) internal successors, (1030), 5 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,027 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 106 flow. Second operand 4 states and 356 transitions. [2023-11-17 16:04:45,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 211 flow [2023-11-17 16:04:45,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 16:04:45,029 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 123 flow [2023-11-17 16:04:45,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-11-17 16:04:45,029 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-11-17 16:04:45,029 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 123 flow [2023-11-17 16:04:45,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 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 16:04:45,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:45,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:45,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:04:45,030 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:45,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash -140958070, now seen corresponding path program 1 times [2023-11-17 16:04:45,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:45,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669536905] [2023-11-17 16:04:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:45,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:45,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:45,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:45,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669536905] [2023-11-17 16:04:45,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669536905] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:45,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047462922] [2023-11-17 16:04:45,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:45,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:45,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:45,095 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:45,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:04:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:45,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 16:04:45,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:45,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:45,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047462922] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:45,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:45,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 16:04:45,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258052523] [2023-11-17 16:04:45,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:45,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:04:45,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:45,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:04:45,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:04:45,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-11-17 16:04:45,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 80.71428571428571) internal successors, (565), 7 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:45,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-11-17 16:04:45,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:45,620 INFO L124 PetriNetUnfolderBase]: 67/139 cut-off events. [2023-11-17 16:04:45,621 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-11-17 16:04:45,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 139 events. 67/139 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 414 event pairs, 2 based on Foata normal form. 20/159 useless extension candidates. Maximal degree in co-relation 344. Up to 65 conditions per place. [2023-11-17 16:04:45,622 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 35 selfloop transitions, 10 changer transitions 4/51 dead transitions. [2023-11-17 16:04:45,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 51 transitions, 352 flow [2023-11-17 16:04:45,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:04:45,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:04:45,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 508 transitions. [2023-11-17 16:04:45,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110032362459547 [2023-11-17 16:04:45,624 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 508 transitions. [2023-11-17 16:04:45,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 508 transitions. [2023-11-17 16:04:45,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:45,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 508 transitions. [2023-11-17 16:04:45,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 84.66666666666667) internal successors, (508), 6 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,627 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,628 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 123 flow. Second operand 6 states and 508 transitions. [2023-11-17 16:04:45,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 51 transitions, 352 flow [2023-11-17 16:04:45,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 51 transitions, 327 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-17 16:04:45,630 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 192 flow [2023-11-17 16:04:45,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-11-17 16:04:45,631 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-11-17 16:04:45,631 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 192 flow [2023-11-17 16:04:45,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 80.71428571428571) internal successors, (565), 7 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:45,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:45,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:45,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:45,838 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:45,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1623312732, now seen corresponding path program 2 times [2023-11-17 16:04:45,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:45,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750082042] [2023-11-17 16:04:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:45,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:45,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:45,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750082042] [2023-11-17 16:04:45,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750082042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:04:45,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:04:45,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 16:04:45,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772864865] [2023-11-17 16:04:45,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:04:45,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:04:45,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:04:45,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:04:45,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 206 [2023-11-17 16:04:45,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 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 16:04:45,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:45,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 206 [2023-11-17 16:04:45,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:45,945 INFO L124 PetriNetUnfolderBase]: 69/144 cut-off events. [2023-11-17 16:04:45,945 INFO L125 PetriNetUnfolderBase]: For 385/387 co-relation queries the response was YES. [2023-11-17 16:04:45,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 610 conditions, 144 events. 69/144 cut-off events. For 385/387 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 436 event pairs, 9 based on Foata normal form. 2/146 useless extension candidates. Maximal degree in co-relation 409. Up to 62 conditions per place. [2023-11-17 16:04:45,946 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 35 selfloop transitions, 8 changer transitions 2/47 dead transitions. [2023-11-17 16:04:45,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 387 flow [2023-11-17 16:04:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:04:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:04:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 442 transitions. [2023-11-17 16:04:45,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.429126213592233 [2023-11-17 16:04:45,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 442 transitions. [2023-11-17 16:04:45,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 442 transitions. [2023-11-17 16:04:45,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:45,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 442 transitions. [2023-11-17 16:04:45,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.4) internal successors, (442), 5 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,950 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 206.0) internal successors, (1236), 6 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:45,950 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 192 flow. Second operand 5 states and 442 transitions. [2023-11-17 16:04:45,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 387 flow [2023-11-17 16:04:45,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 366 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-17 16:04:45,953 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 227 flow [2023-11-17 16:04:45,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2023-11-17 16:04:45,953 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-11-17 16:04:45,953 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 227 flow [2023-11-17 16:04:45,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.0) internal successors, (340), 4 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 16:04:45,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:45,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:45,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:04:45,954 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:45,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1712020504, now seen corresponding path program 1 times [2023-11-17 16:04:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183060531] [2023-11-17 16:04:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:45,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:46,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:46,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:46,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183060531] [2023-11-17 16:04:46,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183060531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:46,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116724708] [2023-11-17 16:04:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:46,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:46,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:46,094 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:46,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:04:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:46,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:04:46,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:46,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:04:46,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:46,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116724708] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:46,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 6] total 10 [2023-11-17 16:04:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107637881] [2023-11-17 16:04:46,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:46,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 16:04:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 16:04:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-11-17 16:04:46,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-11-17 16:04:46,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 227 flow. Second operand has 11 states, 11 states have (on average 79.9090909090909) internal successors, (879), 11 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:46,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:46,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-11-17 16:04:46,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:50,204 INFO L124 PetriNetUnfolderBase]: 161/290 cut-off events. [2023-11-17 16:04:50,204 INFO L125 PetriNetUnfolderBase]: For 1095/1095 co-relation queries the response was YES. [2023-11-17 16:04:50,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 290 events. 161/290 cut-off events. For 1095/1095 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1017 event pairs, 0 based on Foata normal form. 28/318 useless extension candidates. Maximal degree in co-relation 790. Up to 126 conditions per place. [2023-11-17 16:04:50,207 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 66 selfloop transitions, 46 changer transitions 0/114 dead transitions. [2023-11-17 16:04:50,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 114 transitions, 951 flow [2023-11-17 16:04:50,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:04:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:04:50,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1567 transitions. [2023-11-17 16:04:50,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40035769034236074 [2023-11-17 16:04:50,210 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1567 transitions. [2023-11-17 16:04:50,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1567 transitions. [2023-11-17 16:04:50,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:50,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1567 transitions. [2023-11-17 16:04:50,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 82.47368421052632) internal successors, (1567), 19 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:50,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:50,217 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 206.0) internal successors, (4120), 20 states have internal predecessors, (4120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:50,218 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 227 flow. Second operand 19 states and 1567 transitions. [2023-11-17 16:04:50,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 114 transitions, 951 flow [2023-11-17 16:04:50,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 114 transitions, 949 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-17 16:04:50,221 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 728 flow [2023-11-17 16:04:50,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=728, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2023-11-17 16:04:50,222 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-11-17 16:04:50,222 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 728 flow [2023-11-17 16:04:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 79.9090909090909) internal successors, (879), 11 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:50,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:50,222 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:50,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:50,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 16:04:50,427 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:50,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash 245695766, now seen corresponding path program 2 times [2023-11-17 16:04:50,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:50,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146708823] [2023-11-17 16:04:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:50,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:50,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:50,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146708823] [2023-11-17 16:04:50,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146708823] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:50,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987191555] [2023-11-17 16:04:50,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:04:50,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:50,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:50,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:50,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:04:50,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:04:50,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:50,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 16:04:50,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:50,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:50,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:51,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987191555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:51,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:51,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-17 16:04:51,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397982666] [2023-11-17 16:04:51,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:51,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 16:04:51,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 16:04:51,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-17 16:04:51,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-11-17 16:04:51,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 728 flow. Second operand has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:51,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-11-17 16:04:51,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:51,355 INFO L124 PetriNetUnfolderBase]: 270/489 cut-off events. [2023-11-17 16:04:51,355 INFO L125 PetriNetUnfolderBase]: For 4371/4371 co-relation queries the response was YES. [2023-11-17 16:04:51,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3091 conditions, 489 events. 270/489 cut-off events. For 4371/4371 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1985 event pairs, 24 based on Foata normal form. 30/519 useless extension candidates. Maximal degree in co-relation 2324. Up to 217 conditions per place. [2023-11-17 16:04:51,359 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 95 selfloop transitions, 36 changer transitions 0/133 dead transitions. [2023-11-17 16:04:51,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 133 transitions, 1600 flow [2023-11-17 16:04:51,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 16:04:51,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 16:04:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 908 transitions. [2023-11-17 16:04:51,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007060900264784 [2023-11-17 16:04:51,362 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 908 transitions. [2023-11-17 16:04:51,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 908 transitions. [2023-11-17 16:04:51,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:51,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 908 transitions. [2023-11-17 16:04:51,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 82.54545454545455) internal successors, (908), 11 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 206.0) internal successors, (2472), 12 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,368 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 206.0) internal successors, (2472), 12 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,368 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 728 flow. Second operand 11 states and 908 transitions. [2023-11-17 16:04:51,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 133 transitions, 1600 flow [2023-11-17 16:04:51,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 133 transitions, 1266 flow, removed 150 selfloop flow, removed 4 redundant places. [2023-11-17 16:04:51,381 INFO L231 Difference]: Finished difference. Result has 78 places, 78 transitions, 888 flow [2023-11-17 16:04:51,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=888, PETRI_PLACES=78, PETRI_TRANSITIONS=78} [2023-11-17 16:04:51,381 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 58 predicate places. [2023-11-17 16:04:51,381 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 78 transitions, 888 flow [2023-11-17 16:04:51,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.0) internal successors, (800), 10 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:51,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:51,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:51,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 16:04:51,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:51,589 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:51,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:51,590 INFO L85 PathProgramCache]: Analyzing trace with hash -11557260, now seen corresponding path program 3 times [2023-11-17 16:04:51,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:51,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421754452] [2023-11-17 16:04:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:51,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:04:52,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421754452] [2023-11-17 16:04:52,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421754452] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9534055] [2023-11-17 16:04:52,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:04:52,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:52,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:52,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:52,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:04:52,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:04:52,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:52,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:04:52,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:52,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:52,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:52,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9534055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:52,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:52,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2023-11-17 16:04:52,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520112556] [2023-11-17 16:04:52,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:52,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:04:52,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:52,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:04:52,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:04:52,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-11-17 16:04:52,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 888 flow. Second operand has 13 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:52,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:52,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-11-17 16:04:52,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:53,528 INFO L124 PetriNetUnfolderBase]: 458/852 cut-off events. [2023-11-17 16:04:53,528 INFO L125 PetriNetUnfolderBase]: For 7681/7681 co-relation queries the response was YES. [2023-11-17 16:04:53,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5110 conditions, 852 events. 458/852 cut-off events. For 7681/7681 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4192 event pairs, 4 based on Foata normal form. 5/857 useless extension candidates. Maximal degree in co-relation 4381. Up to 293 conditions per place. [2023-11-17 16:04:53,534 INFO L140 encePairwiseOnDemand]: 200/206 looper letters, 88 selfloop transitions, 103 changer transitions 5/198 dead transitions. [2023-11-17 16:04:53,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 198 transitions, 2539 flow [2023-11-17 16:04:53,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:04:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:04:53,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1099 transitions. [2023-11-17 16:04:53,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35566343042071197 [2023-11-17 16:04:53,538 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1099 transitions. [2023-11-17 16:04:53,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1099 transitions. [2023-11-17 16:04:53,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:53,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1099 transitions. [2023-11-17 16:04:53,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 73.26666666666667) internal successors, (1099), 15 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,543 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 206.0) internal successors, (3296), 16 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,543 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 888 flow. Second operand 15 states and 1099 transitions. [2023-11-17 16:04:53,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 198 transitions, 2539 flow [2023-11-17 16:04:53,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 198 transitions, 2093 flow, removed 201 selfloop flow, removed 4 redundant places. [2023-11-17 16:04:53,561 INFO L231 Difference]: Finished difference. Result has 94 places, 143 transitions, 1844 flow [2023-11-17 16:04:53,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1844, PETRI_PLACES=94, PETRI_TRANSITIONS=143} [2023-11-17 16:04:53,564 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 74 predicate places. [2023-11-17 16:04:53,564 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 143 transitions, 1844 flow [2023-11-17 16:04:53,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:53,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:53,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:53,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:53,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:53,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:53,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash -568748978, now seen corresponding path program 4 times [2023-11-17 16:04:53,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:53,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701462730] [2023-11-17 16:04:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:04:54,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701462730] [2023-11-17 16:04:54,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701462730] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:54,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528022418] [2023-11-17 16:04:54,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:04:54,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:54,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:54,320 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:54,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:04:54,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:04:54,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:54,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:04:54,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:54,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:55,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528022418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:55,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:55,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2023-11-17 16:04:55,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041211245] [2023-11-17 16:04:55,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:55,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:04:55,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:04:55,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:04:55,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-11-17 16:04:55,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 143 transitions, 1844 flow. Second operand has 13 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:55,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:55,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-11-17 16:04:55,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:56,486 INFO L124 PetriNetUnfolderBase]: 610/1139 cut-off events. [2023-11-17 16:04:56,487 INFO L125 PetriNetUnfolderBase]: For 9727/9727 co-relation queries the response was YES. [2023-11-17 16:04:56,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6902 conditions, 1139 events. 610/1139 cut-off events. For 9727/9727 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6021 event pairs, 24 based on Foata normal form. 4/1143 useless extension candidates. Maximal degree in co-relation 5837. Up to 434 conditions per place. [2023-11-17 16:04:56,495 INFO L140 encePairwiseOnDemand]: 200/206 looper letters, 118 selfloop transitions, 126 changer transitions 7/253 dead transitions. [2023-11-17 16:04:56,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 253 transitions, 3486 flow [2023-11-17 16:04:56,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:04:56,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:04:56,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1226 transitions. [2023-11-17 16:04:56,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3500856653340948 [2023-11-17 16:04:56,498 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1226 transitions. [2023-11-17 16:04:56,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1226 transitions. [2023-11-17 16:04:56,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:56,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1226 transitions. [2023-11-17 16:04:56,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 72.11764705882354) internal successors, (1226), 17 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,505 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 206.0) internal successors, (3708), 18 states have internal predecessors, (3708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,505 INFO L175 Difference]: Start difference. First operand has 94 places, 143 transitions, 1844 flow. Second operand 17 states and 1226 transitions. [2023-11-17 16:04:56,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 253 transitions, 3486 flow [2023-11-17 16:04:56,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 253 transitions, 3196 flow, removed 137 selfloop flow, removed 3 redundant places. [2023-11-17 16:04:56,540 INFO L231 Difference]: Finished difference. Result has 114 places, 202 transitions, 2847 flow [2023-11-17 16:04:56,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2847, PETRI_PLACES=114, PETRI_TRANSITIONS=202} [2023-11-17 16:04:56,540 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 94 predicate places. [2023-11-17 16:04:56,540 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 202 transitions, 2847 flow [2023-11-17 16:04:56,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:56,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:56,541 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:56,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:56,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:56,746 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:56,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:56,747 INFO L85 PathProgramCache]: Analyzing trace with hash 796145528, now seen corresponding path program 5 times [2023-11-17 16:04:56,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:56,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144196365] [2023-11-17 16:04:56,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:56,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:04:57,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:57,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144196365] [2023-11-17 16:04:57,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144196365] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:57,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937574706] [2023-11-17 16:04:57,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:04:57,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:57,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:57,360 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:57,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:04:57,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:04:57,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:04:57,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:04:57,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:04:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:57,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:04:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:58,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937574706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:04:58,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:04:58,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-11-17 16:04:58,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531365179] [2023-11-17 16:04:58,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:04:58,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:04:58,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:04:58,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:04:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:04:58,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-11-17 16:04:58,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 202 transitions, 2847 flow. Second operand has 14 states, 14 states have (on average 69.35714285714286) internal successors, (971), 14 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:58,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:04:58,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-11-17 16:04:58,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:04:59,477 INFO L124 PetriNetUnfolderBase]: 817/1546 cut-off events. [2023-11-17 16:04:59,477 INFO L125 PetriNetUnfolderBase]: For 13219/13219 co-relation queries the response was YES. [2023-11-17 16:04:59,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9840 conditions, 1546 events. 817/1546 cut-off events. For 13219/13219 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8941 event pairs, 26 based on Foata normal form. 6/1552 useless extension candidates. Maximal degree in co-relation 9190. Up to 443 conditions per place. [2023-11-17 16:04:59,489 INFO L140 encePairwiseOnDemand]: 200/206 looper letters, 78 selfloop transitions, 240 changer transitions 9/329 dead transitions. [2023-11-17 16:04:59,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 329 transitions, 5028 flow [2023-11-17 16:04:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:04:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:04:59,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1300 transitions. [2023-11-17 16:04:59,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3505933117583603 [2023-11-17 16:04:59,493 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1300 transitions. [2023-11-17 16:04:59,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1300 transitions. [2023-11-17 16:04:59,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:04:59,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1300 transitions. [2023-11-17 16:04:59,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 72.22222222222223) internal successors, (1300), 18 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 206.0) internal successors, (3914), 19 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,500 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 206.0) internal successors, (3914), 19 states have internal predecessors, (3914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,500 INFO L175 Difference]: Start difference. First operand has 114 places, 202 transitions, 2847 flow. Second operand 18 states and 1300 transitions. [2023-11-17 16:04:59,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 329 transitions, 5028 flow [2023-11-17 16:04:59,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 329 transitions, 4649 flow, removed 180 selfloop flow, removed 4 redundant places. [2023-11-17 16:04:59,571 INFO L231 Difference]: Finished difference. Result has 130 places, 274 transitions, 4301 flow [2023-11-17 16:04:59,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4301, PETRI_PLACES=130, PETRI_TRANSITIONS=274} [2023-11-17 16:04:59,572 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 110 predicate places. [2023-11-17 16:04:59,572 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 274 transitions, 4301 flow [2023-11-17 16:04:59,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 69.35714285714286) internal successors, (971), 14 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:04:59,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:04:59,573 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:04:59,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:04:59,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:59,778 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:04:59,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:04:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1997888013, now seen corresponding path program 6 times [2023-11-17 16:04:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:04:59,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483850261] [2023-11-17 16:04:59,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:04:59,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:04:59,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:04:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:04:59,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:04:59,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483850261] [2023-11-17 16:04:59,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483850261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:04:59,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234798031] [2023-11-17 16:04:59,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:04:59,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:04:59,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:04:59,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:04:59,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:05:00,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:05:00,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:05:00,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:05:00,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:05:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:00,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:05:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:01,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234798031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:05:01,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:05:01,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-17 16:05:01,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119000125] [2023-11-17 16:05:01,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:05:01,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:05:01,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:05:01,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:05:01,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:05:01,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-11-17 16:05:01,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 274 transitions, 4301 flow. Second operand has 19 states, 19 states have (on average 69.05263157894737) internal successors, (1312), 19 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:01,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:05:01,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-11-17 16:05:01,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:05:03,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:05:11,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:05:13,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 16:05:16,903 INFO L124 PetriNetUnfolderBase]: 1287/2448 cut-off events. [2023-11-17 16:05:16,903 INFO L125 PetriNetUnfolderBase]: For 18223/18223 co-relation queries the response was YES. [2023-11-17 16:05:16,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16661 conditions, 2448 events. 1287/2448 cut-off events. For 18223/18223 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15796 event pairs, 32 based on Foata normal form. 56/2504 useless extension candidates. Maximal degree in co-relation 16065. Up to 673 conditions per place. [2023-11-17 16:05:16,923 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 245 selfloop transitions, 301 changer transitions 28/576 dead transitions. [2023-11-17 16:05:16,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 576 transitions, 9576 flow [2023-11-17 16:05:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:05:16,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:05:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1583 transitions. [2023-11-17 16:05:16,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492939099735216 [2023-11-17 16:05:16,926 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1583 transitions. [2023-11-17 16:05:16,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1583 transitions. [2023-11-17 16:05:16,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:05:16,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1583 transitions. [2023-11-17 16:05:16,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:16,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:16,933 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 206.0) internal successors, (4738), 23 states have internal predecessors, (4738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:16,933 INFO L175 Difference]: Start difference. First operand has 130 places, 274 transitions, 4301 flow. Second operand 22 states and 1583 transitions. [2023-11-17 16:05:16,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 576 transitions, 9576 flow [2023-11-17 16:05:17,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 576 transitions, 8469 flow, removed 495 selfloop flow, removed 10 redundant places. [2023-11-17 16:05:17,083 INFO L231 Difference]: Finished difference. Result has 151 places, 453 transitions, 7632 flow [2023-11-17 16:05:17,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=3786, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=7632, PETRI_PLACES=151, PETRI_TRANSITIONS=453} [2023-11-17 16:05:17,083 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-11-17 16:05:17,083 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 453 transitions, 7632 flow [2023-11-17 16:05:17,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 69.05263157894737) internal successors, (1312), 19 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:17,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:05:17,084 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:05:17,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 16:05:17,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:17,289 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:05:17,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:05:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash 450703085, now seen corresponding path program 7 times [2023-11-17 16:05:17,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:05:17,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804963878] [2023-11-17 16:05:17,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:05:17,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:05:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:05:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:17,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:05:17,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804963878] [2023-11-17 16:05:17,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804963878] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:05:17,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751864204] [2023-11-17 16:05:17,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:05:17,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:17,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:05:17,498 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:05:17,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:05:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:05:17,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:05:17,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:05:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:17,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:05:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:18,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751864204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:05:18,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:05:18,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-17 16:05:18,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251222572] [2023-11-17 16:05:18,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:05:18,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:05:18,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:05:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:05:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:05:18,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-11-17 16:05:18,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 453 transitions, 7632 flow. Second operand has 19 states, 19 states have (on average 69.05263157894737) internal successors, (1312), 19 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:18,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:05:18,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-11-17 16:05:18,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:05:30,883 INFO L124 PetriNetUnfolderBase]: 1940/3565 cut-off events. [2023-11-17 16:05:30,883 INFO L125 PetriNetUnfolderBase]: For 31840/31840 co-relation queries the response was YES. [2023-11-17 16:05:30,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25496 conditions, 3565 events. 1940/3565 cut-off events. For 31840/31840 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 24019 event pairs, 42 based on Foata normal form. 82/3647 useless extension candidates. Maximal degree in co-relation 25296. Up to 841 conditions per place. [2023-11-17 16:05:30,913 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 285 selfloop transitions, 579 changer transitions 16/882 dead transitions. [2023-11-17 16:05:30,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 882 transitions, 15285 flow [2023-11-17 16:05:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 16:05:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 16:05:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2106 transitions. [2023-11-17 16:05:30,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.352527619685303 [2023-11-17 16:05:30,916 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2106 transitions. [2023-11-17 16:05:30,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2106 transitions. [2023-11-17 16:05:30,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:05:30,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2106 transitions. [2023-11-17 16:05:30,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 72.62068965517241) internal successors, (2106), 29 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:30,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:30,924 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 206.0) internal successors, (6180), 30 states have internal predecessors, (6180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:30,924 INFO L175 Difference]: Start difference. First operand has 151 places, 453 transitions, 7632 flow. Second operand 29 states and 2106 transitions. [2023-11-17 16:05:30,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 882 transitions, 15285 flow [2023-11-17 16:05:31,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 882 transitions, 14566 flow, removed 300 selfloop flow, removed 16 redundant places. [2023-11-17 16:05:31,405 INFO L231 Difference]: Finished difference. Result has 173 places, 743 transitions, 14053 flow [2023-11-17 16:05:31,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=7118, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14053, PETRI_PLACES=173, PETRI_TRANSITIONS=743} [2023-11-17 16:05:31,405 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-11-17 16:05:31,406 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 743 transitions, 14053 flow [2023-11-17 16:05:31,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 69.05263157894737) internal successors, (1312), 19 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:31,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:05:31,407 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:05:31,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 16:05:31,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-17 16:05:31,613 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:05:31,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:05:31,613 INFO L85 PathProgramCache]: Analyzing trace with hash -605020969, now seen corresponding path program 8 times [2023-11-17 16:05:31,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:05:31,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399380880] [2023-11-17 16:05:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:05:31,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:05:31,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:05:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:31,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:05:31,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399380880] [2023-11-17 16:05:31,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399380880] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:05:31,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893094957] [2023-11-17 16:05:31,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:05:31,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:05:31,746 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:05:31,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:05:31,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:05:31,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:05:31,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:05:31,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:05:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:32,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:05:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:32,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893094957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:05:32,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:05:32,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-11-17 16:05:32,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624546624] [2023-11-17 16:05:32,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:05:32,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:05:32,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:05:32,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:05:32,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:05:32,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-11-17 16:05:32,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 743 transitions, 14053 flow. Second operand has 19 states, 19 states have (on average 74.10526315789474) internal successors, (1408), 19 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:32,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:05:32,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-11-17 16:05:32,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:05:40,002 INFO L124 PetriNetUnfolderBase]: 3117/5852 cut-off events. [2023-11-17 16:05:40,003 INFO L125 PetriNetUnfolderBase]: For 61673/61673 co-relation queries the response was YES. [2023-11-17 16:05:40,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45508 conditions, 5852 events. 3117/5852 cut-off events. For 61673/61673 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 43777 event pairs, 16 based on Foata normal form. 256/6108 useless extension candidates. Maximal degree in co-relation 43603. Up to 1259 conditions per place. [2023-11-17 16:05:40,048 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 406 selfloop transitions, 1049 changer transitions 16/1473 dead transitions. [2023-11-17 16:05:40,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 1473 transitions, 28571 flow [2023-11-17 16:05:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-17 16:05:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-11-17 16:05:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4422 transitions. [2023-11-17 16:05:40,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3765968318855391 [2023-11-17 16:05:40,053 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4422 transitions. [2023-11-17 16:05:40,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4422 transitions. [2023-11-17 16:05:40,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:05:40,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4422 transitions. [2023-11-17 16:05:40,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 77.57894736842105) internal successors, (4422), 57 states have internal predecessors, (4422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:40,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 206.0) internal successors, (11948), 58 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:40,067 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 206.0) internal successors, (11948), 58 states have internal predecessors, (11948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:40,067 INFO L175 Difference]: Start difference. First operand has 173 places, 743 transitions, 14053 flow. Second operand 57 states and 4422 transitions. [2023-11-17 16:05:40,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 1473 transitions, 28571 flow [2023-11-17 16:05:41,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1473 transitions, 27740 flow, removed 411 selfloop flow, removed 3 redundant places. [2023-11-17 16:05:41,527 INFO L231 Difference]: Finished difference. Result has 246 places, 1302 transitions, 27924 flow [2023-11-17 16:05:41,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=13430, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=27924, PETRI_PLACES=246, PETRI_TRANSITIONS=1302} [2023-11-17 16:05:41,530 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 226 predicate places. [2023-11-17 16:05:41,530 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 1302 transitions, 27924 flow [2023-11-17 16:05:41,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 74.10526315789474) internal successors, (1408), 19 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:41,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:05:41,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:05:41,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 16:05:41,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 16:05:41,735 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:05:41,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:05:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1467002360, now seen corresponding path program 9 times [2023-11-17 16:05:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:05:41,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833373832] [2023-11-17 16:05:41,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:05:41,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:05:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:05:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:05:42,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:05:42,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833373832] [2023-11-17 16:05:42,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833373832] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:05:42,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072534983] [2023-11-17 16:05:42,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:05:42,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:42,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:05:42,067 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:05:42,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:05:42,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:05:42,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:05:42,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:05:42,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:05:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:05:42,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:05:43,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:05:43,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072534983] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:05:43,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:05:43,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-17 16:05:43,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96957608] [2023-11-17 16:05:43,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:05:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 16:05:43,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:05:43,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 16:05:43,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-17 16:05:43,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-11-17 16:05:43,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 1302 transitions, 27924 flow. Second operand has 18 states, 18 states have (on average 74.22222222222223) internal successors, (1336), 18 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:43,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:05:43,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-11-17 16:05:43,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:05:46,648 INFO L124 PetriNetUnfolderBase]: 3131/5552 cut-off events. [2023-11-17 16:05:46,648 INFO L125 PetriNetUnfolderBase]: For 74943/74943 co-relation queries the response was YES. [2023-11-17 16:05:46,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49585 conditions, 5552 events. 3131/5552 cut-off events. For 74943/74943 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37790 event pairs, 254 based on Foata normal form. 324/5876 useless extension candidates. Maximal degree in co-relation 48850. Up to 1181 conditions per place. [2023-11-17 16:05:46,701 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 807 selfloop transitions, 730 changer transitions 13/1552 dead transitions. [2023-11-17 16:05:46,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1552 transitions, 34553 flow [2023-11-17 16:05:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:05:46,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:05:46,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1626 transitions. [2023-11-17 16:05:46,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37586685159500693 [2023-11-17 16:05:46,704 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1626 transitions. [2023-11-17 16:05:46,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1626 transitions. [2023-11-17 16:05:46,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:05:46,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1626 transitions. [2023-11-17 16:05:46,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 77.42857142857143) internal successors, (1626), 21 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:46,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 206.0) internal successors, (4532), 22 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:46,709 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 206.0) internal successors, (4532), 22 states have internal predecessors, (4532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:46,709 INFO L175 Difference]: Start difference. First operand has 246 places, 1302 transitions, 27924 flow. Second operand 21 states and 1626 transitions. [2023-11-17 16:05:46,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1552 transitions, 34553 flow [2023-11-17 16:05:48,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1552 transitions, 32974 flow, removed 728 selfloop flow, removed 13 redundant places. [2023-11-17 16:05:48,738 INFO L231 Difference]: Finished difference. Result has 254 places, 1276 transitions, 27398 flow [2023-11-17 16:05:48,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=22704, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=614, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=27398, PETRI_PLACES=254, PETRI_TRANSITIONS=1276} [2023-11-17 16:05:48,739 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 234 predicate places. [2023-11-17 16:05:48,740 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 1276 transitions, 27398 flow [2023-11-17 16:05:48,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 74.22222222222223) internal successors, (1336), 18 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:48,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:05:48,740 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:05:48,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-17 16:05:48,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 16:05:48,945 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:05:48,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:05:48,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2090287693, now seen corresponding path program 10 times [2023-11-17 16:05:48,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:05:48,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957806163] [2023-11-17 16:05:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:05:48,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:05:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:05:49,181 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:05:49,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:05:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957806163] [2023-11-17 16:05:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957806163] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:05:49,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819790884] [2023-11-17 16:05:49,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:05:49,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:05:49,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:05:49,193 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:05:49,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:05:49,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:05:49,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:05:49,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:05:49,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:05:49,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:05:49,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:05:50,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:05:50,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819790884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:05:50,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:05:50,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2023-11-17 16:05:50,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446189369] [2023-11-17 16:05:50,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:05:50,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:05:50,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:05:50,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:05:50,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:05:50,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-11-17 16:05:50,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 1276 transitions, 27398 flow. Second operand has 21 states, 21 states have (on average 74.0952380952381) internal successors, (1556), 21 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:50,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:05:50,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-11-17 16:05:50,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:05:58,791 INFO L124 PetriNetUnfolderBase]: 4026/6921 cut-off events. [2023-11-17 16:05:58,791 INFO L125 PetriNetUnfolderBase]: For 93457/93457 co-relation queries the response was YES. [2023-11-17 16:05:58,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62597 conditions, 6921 events. 4026/6921 cut-off events. For 93457/93457 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 46326 event pairs, 20 based on Foata normal form. 382/7303 useless extension candidates. Maximal degree in co-relation 61954. Up to 1623 conditions per place. [2023-11-17 16:05:58,875 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 677 selfloop transitions, 1257 changer transitions 32/1968 dead transitions. [2023-11-17 16:05:58,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1968 transitions, 43352 flow [2023-11-17 16:05:58,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-17 16:05:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-11-17 16:05:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 5273 transitions. [2023-11-17 16:05:58,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37097228084986633 [2023-11-17 16:05:58,889 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 5273 transitions. [2023-11-17 16:05:58,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 5273 transitions. [2023-11-17 16:05:58,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:05:58,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 5273 transitions. [2023-11-17 16:05:58,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 76.42028985507247) internal successors, (5273), 69 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:58,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 206.0) internal successors, (14420), 70 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:58,918 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 206.0) internal successors, (14420), 70 states have internal predecessors, (14420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:05:58,918 INFO L175 Difference]: Start difference. First operand has 254 places, 1276 transitions, 27398 flow. Second operand 69 states and 5273 transitions. [2023-11-17 16:05:58,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1968 transitions, 43352 flow [2023-11-17 16:06:01,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 1968 transitions, 41853 flow, removed 742 selfloop flow, removed 3 redundant places. [2023-11-17 16:06:01,929 INFO L231 Difference]: Finished difference. Result has 351 places, 1674 transitions, 38997 flow [2023-11-17 16:06:01,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=24655, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=38997, PETRI_PLACES=351, PETRI_TRANSITIONS=1674} [2023-11-17 16:06:01,930 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 331 predicate places. [2023-11-17 16:06:01,930 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1674 transitions, 38997 flow [2023-11-17 16:06:01,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 74.0952380952381) internal successors, (1556), 21 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:01,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:06:01,930 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:06:01,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-17 16:06:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:06:02,134 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:06:02,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:06:02,135 INFO L85 PathProgramCache]: Analyzing trace with hash 133208234, now seen corresponding path program 11 times [2023-11-17 16:06:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:06:02,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077857716] [2023-11-17 16:06:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:06:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:06:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:06:02,444 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:06:02,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:06:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077857716] [2023-11-17 16:06:02,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077857716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:06:02,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530088926] [2023-11-17 16:06:02,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:06:02,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:06:02,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:06:02,446 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:06:02,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:06:02,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-11-17 16:06:02,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:06:02,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 16:06:02,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:06:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:06:04,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:06:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:06:07,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530088926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:06:07,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:06:07,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2023-11-17 16:06:07,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329240644] [2023-11-17 16:06:07,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:06:07,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 16:06:07,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:06:07,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 16:06:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2023-11-17 16:06:07,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-11-17 16:06:07,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1674 transitions, 38997 flow. Second operand has 36 states, 36 states have (on average 68.69444444444444) internal successors, (2473), 36 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:07,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:06:07,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-11-17 16:06:07,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:06:16,983 INFO L124 PetriNetUnfolderBase]: 5109/8915 cut-off events. [2023-11-17 16:06:16,983 INFO L125 PetriNetUnfolderBase]: For 151688/151688 co-relation queries the response was YES. [2023-11-17 16:06:17,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84442 conditions, 8915 events. 5109/8915 cut-off events. For 151688/151688 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 62912 event pairs, 2 based on Foata normal form. 554/9469 useless extension candidates. Maximal degree in co-relation 84290. Up to 2870 conditions per place. [2023-11-17 16:06:17,071 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 1246 selfloop transitions, 1065 changer transitions 0/2313 dead transitions. [2023-11-17 16:06:17,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 2313 transitions, 55104 flow [2023-11-17 16:06:17,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:06:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:06:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2559 transitions. [2023-11-17 16:06:17,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3549237170596394 [2023-11-17 16:06:17,074 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2559 transitions. [2023-11-17 16:06:17,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2559 transitions. [2023-11-17 16:06:17,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:06:17,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2559 transitions. [2023-11-17 16:06:17,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 73.11428571428571) internal successors, (2559), 35 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:17,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:17,081 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 206.0) internal successors, (7416), 36 states have internal predecessors, (7416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:17,081 INFO L175 Difference]: Start difference. First operand has 351 places, 1674 transitions, 38997 flow. Second operand 35 states and 2559 transitions. [2023-11-17 16:06:17,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 2313 transitions, 55104 flow [2023-11-17 16:06:22,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 2313 transitions, 53000 flow, removed 584 selfloop flow, removed 20 redundant places. [2023-11-17 16:06:22,316 INFO L231 Difference]: Finished difference. Result has 366 places, 2065 transitions, 48442 flow [2023-11-17 16:06:22,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=36766, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=958, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=48442, PETRI_PLACES=366, PETRI_TRANSITIONS=2065} [2023-11-17 16:06:22,317 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 346 predicate places. [2023-11-17 16:06:22,317 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 2065 transitions, 48442 flow [2023-11-17 16:06:22,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 68.69444444444444) internal successors, (2473), 36 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:22,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:06:22,318 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:06:22,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 16:06:22,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:06:22,522 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:06:22,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:06:22,523 INFO L85 PathProgramCache]: Analyzing trace with hash 913574079, now seen corresponding path program 12 times [2023-11-17 16:06:22,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:06:22,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514593953] [2023-11-17 16:06:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:06:22,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:06:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:06:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:06:22,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:06:22,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514593953] [2023-11-17 16:06:22,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514593953] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:06:22,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080978424] [2023-11-17 16:06:22,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:06:22,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:06:22,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:06:22,801 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:06:22,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:06:23,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-17 16:06:23,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:06:23,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:06:23,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:06:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:06:24,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:06:27,430 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:06:27,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080978424] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:06:27,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:06:27,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2023-11-17 16:06:27,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349339857] [2023-11-17 16:06:27,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:06:27,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-17 16:06:27,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:06:27,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-17 16:06:27,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2023-11-17 16:06:27,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-11-17 16:06:27,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 2065 transitions, 48442 flow. Second operand has 31 states, 31 states have (on average 73.74193548387096) internal successors, (2286), 31 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:27,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:06:27,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-11-17 16:06:27,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:06:33,056 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 16:06:46,443 INFO L124 PetriNetUnfolderBase]: 5143/9010 cut-off events. [2023-11-17 16:06:46,444 INFO L125 PetriNetUnfolderBase]: For 137719/137719 co-relation queries the response was YES. [2023-11-17 16:06:46,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86966 conditions, 9010 events. 5143/9010 cut-off events. For 137719/137719 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 64000 event pairs, 10 based on Foata normal form. 16/9026 useless extension candidates. Maximal degree in co-relation 86417. Up to 5193 conditions per place. [2023-11-17 16:06:46,536 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 1273 selfloop transitions, 841 changer transitions 66/2182 dead transitions. [2023-11-17 16:06:46,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 2182 transitions, 53633 flow [2023-11-17 16:06:46,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-17 16:06:46,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-11-17 16:06:46,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2383 transitions. [2023-11-17 16:06:46,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3731600375822111 [2023-11-17 16:06:46,548 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2383 transitions. [2023-11-17 16:06:46,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2383 transitions. [2023-11-17 16:06:46,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:06:46,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2383 transitions. [2023-11-17 16:06:46,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 76.87096774193549) internal successors, (2383), 31 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:46,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:46,567 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 206.0) internal successors, (6592), 32 states have internal predecessors, (6592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:46,568 INFO L175 Difference]: Start difference. First operand has 366 places, 2065 transitions, 48442 flow. Second operand 31 states and 2383 transitions. [2023-11-17 16:06:46,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 2182 transitions, 53633 flow [2023-11-17 16:06:52,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 2182 transitions, 52952 flow, removed 333 selfloop flow, removed 5 redundant places. [2023-11-17 16:06:52,272 INFO L231 Difference]: Finished difference. Result has 400 places, 2067 transitions, 49506 flow [2023-11-17 16:06:52,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=47773, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=49506, PETRI_PLACES=400, PETRI_TRANSITIONS=2067} [2023-11-17 16:06:52,274 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 380 predicate places. [2023-11-17 16:06:52,274 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 2067 transitions, 49506 flow [2023-11-17 16:06:52,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 73.74193548387096) internal successors, (2286), 31 states have internal predecessors, (2286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:52,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:06:52,275 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:06:52,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:06:52,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 16:06:52,489 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:06:52,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:06:52,489 INFO L85 PathProgramCache]: Analyzing trace with hash 447713621, now seen corresponding path program 13 times [2023-11-17 16:06:52,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:06:52,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501204887] [2023-11-17 16:06:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:06:52,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:06:52,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:06:52,909 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:06:52,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:06:52,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501204887] [2023-11-17 16:06:52,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501204887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:06:52,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613353127] [2023-11-17 16:06:52,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:06:52,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:06:52,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:06:52,911 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:06:52,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:06:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:06:53,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 16:06:53,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:06:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:06:53,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:06:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:06:54,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613353127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:06:54,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:06:54,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-11-17 16:06:54,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332171007] [2023-11-17 16:06:54,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:06:54,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 16:06:54,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:06:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 16:06:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-11-17 16:06:54,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 206 [2023-11-17 16:06:54,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 2067 transitions, 49506 flow. Second operand has 29 states, 29 states have (on average 83.93103448275862) internal successors, (2434), 29 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:06:54,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:06:54,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 206 [2023-11-17 16:06:54,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:07:05,576 INFO L124 PetriNetUnfolderBase]: 6009/10689 cut-off events. [2023-11-17 16:07:05,577 INFO L125 PetriNetUnfolderBase]: For 207723/207723 co-relation queries the response was YES. [2023-11-17 16:07:05,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103603 conditions, 10689 events. 6009/10689 cut-off events. For 207723/207723 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 79522 event pairs, 24 based on Foata normal form. 636/11325 useless extension candidates. Maximal degree in co-relation 103358. Up to 2775 conditions per place. [2023-11-17 16:07:05,709 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 1554 selfloop transitions, 740 changer transitions 454/2750 dead transitions. [2023-11-17 16:07:05,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 2750 transitions, 67516 flow [2023-11-17 16:07:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:07:05,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:07:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2107 transitions. [2023-11-17 16:07:05,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261731391585761 [2023-11-17 16:07:05,713 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2107 transitions. [2023-11-17 16:07:05,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2107 transitions. [2023-11-17 16:07:05,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:07:05,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2107 transitions. [2023-11-17 16:07:05,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 87.79166666666667) internal successors, (2107), 24 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:05,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:05,730 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 206.0) internal successors, (5150), 25 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:05,730 INFO L175 Difference]: Start difference. First operand has 400 places, 2067 transitions, 49506 flow. Second operand 24 states and 2107 transitions. [2023-11-17 16:07:05,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 2750 transitions, 67516 flow [2023-11-17 16:07:11,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 2750 transitions, 65621 flow, removed 66 selfloop flow, removed 21 redundant places. [2023-11-17 16:07:11,441 INFO L231 Difference]: Finished difference. Result has 389 places, 1541 transitions, 34094 flow [2023-11-17 16:07:11,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=41506, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=647, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=34094, PETRI_PLACES=389, PETRI_TRANSITIONS=1541} [2023-11-17 16:07:11,443 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 369 predicate places. [2023-11-17 16:07:11,443 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1541 transitions, 34094 flow [2023-11-17 16:07:11,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 83.93103448275862) internal successors, (2434), 29 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:11,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:07:11,443 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:07:11,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:07:11,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:07:11,648 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:07:11,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:07:11,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1285915268, now seen corresponding path program 14 times [2023-11-17 16:07:11,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:07:11,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623046211] [2023-11-17 16:07:11,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:07:11,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:07:11,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:07:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:07:11,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:07:11,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623046211] [2023-11-17 16:07:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623046211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:07:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016898837] [2023-11-17 16:07:11,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:07:11,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:07:11,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:07:11,933 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:07:11,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:07:12,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:07:12,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:07:12,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 16:07:12,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:07:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-17 16:07:12,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:07:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:07:13,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016898837] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:07:13,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:07:13,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 22 [2023-11-17 16:07:13,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652791844] [2023-11-17 16:07:13,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:07:13,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:07:13,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:07:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:07:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:07:13,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-11-17 16:07:13,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1541 transitions, 34094 flow. Second operand has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:13,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:07:13,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-11-17 16:07:13,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:07:21,663 INFO L124 PetriNetUnfolderBase]: 5642/9943 cut-off events. [2023-11-17 16:07:21,663 INFO L125 PetriNetUnfolderBase]: For 146371/146371 co-relation queries the response was YES. [2023-11-17 16:07:21,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96669 conditions, 9943 events. 5642/9943 cut-off events. For 146371/146371 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 72128 event pairs, 26 based on Foata normal form. 122/10065 useless extension candidates. Maximal degree in co-relation 96468. Up to 5180 conditions per place. [2023-11-17 16:07:21,768 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 1215 selfloop transitions, 871 changer transitions 83/2171 dead transitions. [2023-11-17 16:07:21,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 2171 transitions, 50528 flow [2023-11-17 16:07:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-17 16:07:21,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-11-17 16:07:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3747 transitions. [2023-11-17 16:07:21,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39542000844238073 [2023-11-17 16:07:21,772 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3747 transitions. [2023-11-17 16:07:21,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3747 transitions. [2023-11-17 16:07:21,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:07:21,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3747 transitions. [2023-11-17 16:07:21,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 81.45652173913044) internal successors, (3747), 46 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:21,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 206.0) internal successors, (9682), 47 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:21,802 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 206.0) internal successors, (9682), 47 states have internal predecessors, (9682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:21,802 INFO L175 Difference]: Start difference. First operand has 389 places, 1541 transitions, 34094 flow. Second operand 46 states and 3747 transitions. [2023-11-17 16:07:21,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 2171 transitions, 50528 flow [2023-11-17 16:07:26,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 2171 transitions, 45593 flow, removed 239 selfloop flow, removed 37 redundant places. [2023-11-17 16:07:26,194 INFO L231 Difference]: Finished difference. Result has 408 places, 1920 transitions, 41236 flow [2023-11-17 16:07:26,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=29751, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=496, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=938, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=41236, PETRI_PLACES=408, PETRI_TRANSITIONS=1920} [2023-11-17 16:07:26,196 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 388 predicate places. [2023-11-17 16:07:26,196 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 1920 transitions, 41236 flow [2023-11-17 16:07:26,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 78.91304347826087) internal successors, (1815), 23 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:26,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:07:26,212 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:07:26,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:07:26,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:07:26,413 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:07:26,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:07:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1565962426, now seen corresponding path program 15 times [2023-11-17 16:07:26,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:07:26,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712612962] [2023-11-17 16:07:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:07:26,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:07:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:07:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:07:26,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:07:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712612962] [2023-11-17 16:07:26,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712612962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:07:26,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228853742] [2023-11-17 16:07:26,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:07:26,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:07:26,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:07:26,700 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:07:26,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:07:26,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 16:07:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:07:26,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:07:26,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:07:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:07:27,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:07:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:07:27,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228853742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:07:27,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:07:27,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-11-17 16:07:27,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825548123] [2023-11-17 16:07:27,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:07:27,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:07:27,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:07:27,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:07:27,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:07:27,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-11-17 16:07:27,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 1920 transitions, 41236 flow. Second operand has 22 states, 22 states have (on average 79.0909090909091) internal successors, (1740), 22 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:27,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:07:27,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-11-17 16:07:27,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:07:35,607 INFO L124 PetriNetUnfolderBase]: 6248/10923 cut-off events. [2023-11-17 16:07:35,608 INFO L125 PetriNetUnfolderBase]: For 148610/148610 co-relation queries the response was YES. [2023-11-17 16:07:35,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103229 conditions, 10923 events. 6248/10923 cut-off events. For 148610/148610 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 79680 event pairs, 8 based on Foata normal form. 70/10993 useless extension candidates. Maximal degree in co-relation 102257. Up to 3884 conditions per place. [2023-11-17 16:07:35,740 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 1326 selfloop transitions, 1162 changer transitions 8/2498 dead transitions. [2023-11-17 16:07:35,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 2498 transitions, 56612 flow [2023-11-17 16:07:35,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-17 16:07:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-11-17 16:07:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4065 transitions. [2023-11-17 16:07:35,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3946601941747573 [2023-11-17 16:07:35,745 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4065 transitions. [2023-11-17 16:07:35,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4065 transitions. [2023-11-17 16:07:35,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:07:35,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4065 transitions. [2023-11-17 16:07:35,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 81.3) internal successors, (4065), 50 states have internal predecessors, (4065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:35,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:35,754 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 206.0) internal successors, (10506), 51 states have internal predecessors, (10506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:35,754 INFO L175 Difference]: Start difference. First operand has 408 places, 1920 transitions, 41236 flow. Second operand 50 states and 4065 transitions. [2023-11-17 16:07:35,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 2498 transitions, 56612 flow [2023-11-17 16:07:40,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 2498 transitions, 54300 flow, removed 912 selfloop flow, removed 15 redundant places. [2023-11-17 16:07:40,739 INFO L231 Difference]: Finished difference. Result has 446 places, 2186 transitions, 48756 flow [2023-11-17 16:07:40,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=39180, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=884, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=48756, PETRI_PLACES=446, PETRI_TRANSITIONS=2186} [2023-11-17 16:07:40,740 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 426 predicate places. [2023-11-17 16:07:40,740 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 2186 transitions, 48756 flow [2023-11-17 16:07:40,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.0909090909091) internal successors, (1740), 22 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:40,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:07:40,741 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:07:40,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:07:40,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:07:40,945 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:07:40,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:07:40,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1736163020, now seen corresponding path program 16 times [2023-11-17 16:07:40,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:07:40,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773082699] [2023-11-17 16:07:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:07:40,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:07:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:07:41,221 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-17 16:07:41,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:07:41,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773082699] [2023-11-17 16:07:41,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773082699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:07:41,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695864536] [2023-11-17 16:07:41,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:07:41,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:07:41,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:07:41,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:07:41,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:07:41,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:07:41,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:07:41,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 16:07:41,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:07:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:07:42,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:07:44,580 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:07:44,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695864536] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:07:44,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:07:44,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 29 [2023-11-17 16:07:44,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483227531] [2023-11-17 16:07:44,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:07:44,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-17 16:07:44,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:07:44,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-17 16:07:44,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2023-11-17 16:07:44,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-11-17 16:07:44,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 2186 transitions, 48756 flow. Second operand has 30 states, 30 states have (on average 73.7) internal successors, (2211), 30 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:07:44,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:07:44,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-11-17 16:07:44,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:07:46,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 16:08:11,866 INFO L124 PetriNetUnfolderBase]: 9280/16295 cut-off events. [2023-11-17 16:08:11,866 INFO L125 PetriNetUnfolderBase]: For 254492/254492 co-relation queries the response was YES. [2023-11-17 16:08:11,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157847 conditions, 16295 events. 9280/16295 cut-off events. For 254492/254492 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 126001 event pairs, 30 based on Foata normal form. 100/16395 useless extension candidates. Maximal degree in co-relation 155369. Up to 8675 conditions per place. [2023-11-17 16:08:12,035 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 1688 selfloop transitions, 1970 changer transitions 0/3660 dead transitions. [2023-11-17 16:08:12,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 3660 transitions, 88911 flow [2023-11-17 16:08:12,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 16:08:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 16:08:12,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3239 transitions. [2023-11-17 16:08:12,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37436430883032823 [2023-11-17 16:08:12,057 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3239 transitions. [2023-11-17 16:08:12,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3239 transitions. [2023-11-17 16:08:12,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:12,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3239 transitions. [2023-11-17 16:08:12,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 77.11904761904762) internal successors, (3239), 42 states have internal predecessors, (3239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:12,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 206.0) internal successors, (8858), 43 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:12,064 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 206.0) internal successors, (8858), 43 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:12,064 INFO L175 Difference]: Start difference. First operand has 446 places, 2186 transitions, 48756 flow. Second operand 42 states and 3239 transitions. [2023-11-17 16:08:12,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 3660 transitions, 88911 flow [2023-11-17 16:08:20,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 3660 transitions, 87871 flow, removed 353 selfloop flow, removed 20 redundant places. [2023-11-17 16:08:20,797 INFO L231 Difference]: Finished difference. Result has 484 places, 3472 transitions, 84835 flow [2023-11-17 16:08:20,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=47997, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=847, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=84835, PETRI_PLACES=484, PETRI_TRANSITIONS=3472} [2023-11-17 16:08:20,798 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 464 predicate places. [2023-11-17 16:08:20,799 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 3472 transitions, 84835 flow [2023-11-17 16:08:20,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 73.7) internal successors, (2211), 30 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:20,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:08:20,799 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:08:20,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 16:08:21,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:21,003 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:08:21,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:08:21,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1715926186, now seen corresponding path program 17 times [2023-11-17 16:08:21,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:08:21,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544387195] [2023-11-17 16:08:21,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:08:21,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:08:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:08:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:08:21,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:08:21,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544387195] [2023-11-17 16:08:21,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544387195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:08:21,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370382509] [2023-11-17 16:08:21,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:08:21,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:08:21,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:08:21,854 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:08:21,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:08:23,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-17 16:08:23,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:08:23,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-17 16:08:23,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:08:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:08:24,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:08:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:08:28,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370382509] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:08:28,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:08:28,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 15] total 36 [2023-11-17 16:08:28,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637256330] [2023-11-17 16:08:28,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:08:28,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 16:08:28,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:08:28,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 16:08:28,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2023-11-17 16:08:28,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 206 [2023-11-17 16:08:28,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 3472 transitions, 84835 flow. Second operand has 37 states, 37 states have (on average 68.51351351351352) internal successors, (2535), 37 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:28,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:08:28,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 206 [2023-11-17 16:08:28,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:08:59,700 INFO L124 PetriNetUnfolderBase]: 10557/18608 cut-off events. [2023-11-17 16:08:59,700 INFO L125 PetriNetUnfolderBase]: For 342045/342045 co-relation queries the response was YES. [2023-11-17 16:08:59,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194679 conditions, 18608 events. 10557/18608 cut-off events. For 342045/342045 co-relation queries the response was YES. Maximal size of possible extension queue 938. Compared 148694 event pairs, 66 based on Foata normal form. 128/18736 useless extension candidates. Maximal degree in co-relation 193077. Up to 4907 conditions per place. [2023-11-17 16:08:59,927 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 2131 selfloop transitions, 1999 changer transitions 233/4365 dead transitions. [2023-11-17 16:08:59,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 4365 transitions, 112809 flow [2023-11-17 16:08:59,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:08:59,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:08:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2137 transitions. [2023-11-17 16:08:59,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34579288025889965 [2023-11-17 16:08:59,929 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2137 transitions. [2023-11-17 16:08:59,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2137 transitions. [2023-11-17 16:08:59,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:08:59,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2137 transitions. [2023-11-17 16:08:59,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 71.23333333333333) internal successors, (2137), 30 states have internal predecessors, (2137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:59,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:59,952 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 206.0) internal successors, (6386), 31 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:08:59,952 INFO L175 Difference]: Start difference. First operand has 484 places, 3472 transitions, 84835 flow. Second operand 30 states and 2137 transitions. [2023-11-17 16:08:59,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 4365 transitions, 112809 flow [2023-11-17 16:09:15,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 4365 transitions, 109648 flow, removed 1570 selfloop flow, removed 5 redundant places. [2023-11-17 16:09:15,641 INFO L231 Difference]: Finished difference. Result has 518 places, 3717 transitions, 95897 flow [2023-11-17 16:09:15,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=82165, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1693, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1706, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=95897, PETRI_PLACES=518, PETRI_TRANSITIONS=3717} [2023-11-17 16:09:15,643 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 498 predicate places. [2023-11-17 16:09:15,643 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 3717 transitions, 95897 flow [2023-11-17 16:09:15,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 68.51351351351352) internal successors, (2535), 37 states have internal predecessors, (2535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:15,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:09:15,644 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:09:15,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:09:15,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:15,850 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:09:15,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:09:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1960123354, now seen corresponding path program 18 times [2023-11-17 16:09:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:09:15,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13999590] [2023-11-17 16:09:15,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:09:15,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:09:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:09:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:09:16,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:09:16,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13999590] [2023-11-17 16:09:16,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13999590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:09:16,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962302735] [2023-11-17 16:09:16,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:09:16,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:09:16,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:09:16,731 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:09:16,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:09:16,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-11-17 16:09:16,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:09:17,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-17 16:09:17,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:09:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-17 16:09:17,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:09:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:09:20,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962302735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:09:20,962 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:09:20,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 35 [2023-11-17 16:09:20,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101520249] [2023-11-17 16:09:20,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:09:20,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 16:09:20,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:09:20,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 16:09:20,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=942, Unknown=0, NotChecked=0, Total=1260 [2023-11-17 16:09:20,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 206 [2023-11-17 16:09:20,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 3717 transitions, 95897 flow. Second operand has 36 states, 36 states have (on average 73.52777777777777) internal successors, (2647), 36 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:09:20,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:09:20,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 206 [2023-11-17 16:09:20,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:10:28,147 INFO L124 PetriNetUnfolderBase]: 12887/21958 cut-off events. [2023-11-17 16:10:28,148 INFO L125 PetriNetUnfolderBase]: For 524807/524807 co-relation queries the response was YES. [2023-11-17 16:10:28,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248389 conditions, 21958 events. 12887/21958 cut-off events. For 524807/524807 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 172485 event pairs, 96 based on Foata normal form. 104/22062 useless extension candidates. Maximal degree in co-relation 248203. Up to 6719 conditions per place. [2023-11-17 16:10:28,478 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 2184 selfloop transitions, 2806 changer transitions 41/5033 dead transitions. [2023-11-17 16:10:28,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 5033 transitions, 140746 flow [2023-11-17 16:10:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-17 16:10:28,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-17 16:10:28,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4410 transitions. [2023-11-17 16:10:28,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36909943086709074 [2023-11-17 16:10:28,481 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4410 transitions. [2023-11-17 16:10:28,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4410 transitions. [2023-11-17 16:10:28,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:10:28,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4410 transitions. [2023-11-17 16:10:28,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 76.03448275862068) internal successors, (4410), 58 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:28,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 206.0) internal successors, (12154), 59 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:28,510 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 206.0) internal successors, (12154), 59 states have internal predecessors, (12154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:28,510 INFO L175 Difference]: Start difference. First operand has 518 places, 3717 transitions, 95897 flow. Second operand 58 states and 4410 transitions. [2023-11-17 16:10:28,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 5033 transitions, 140746 flow [2023-11-17 16:10:55,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 5033 transitions, 139326 flow, removed 638 selfloop flow, removed 13 redundant places. [2023-11-17 16:10:55,858 INFO L231 Difference]: Finished difference. Result has 576 places, 4646 transitions, 132185 flow [2023-11-17 16:10:55,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=206, PETRI_DIFFERENCE_MINUEND_FLOW=94453, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1952, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=132185, PETRI_PLACES=576, PETRI_TRANSITIONS=4646} [2023-11-17 16:10:55,860 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2023-11-17 16:10:55,860 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 4646 transitions, 132185 flow [2023-11-17 16:10:55,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 73.52777777777777) internal successors, (2647), 36 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:10:55,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:10:55,861 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:10:55,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 16:10:56,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:56,086 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 16:10:56,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:10:56,086 INFO L85 PathProgramCache]: Analyzing trace with hash 995174570, now seen corresponding path program 19 times [2023-11-17 16:10:56,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:10:56,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891110424] [2023-11-17 16:10:56,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:10:56,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:10:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-17 16:10:56,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:10:56,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891110424] [2023-11-17 16:10:56,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891110424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:10:56,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156034044] [2023-11-17 16:10:56,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:10:56,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:10:56,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:10:56,373 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:10:56,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 16:10:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:10:57,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 16:10:57,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:11:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:11:00,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:11:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:11:02,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156034044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:11:02,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:11:02,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-11-17 16:11:02,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448020967] [2023-11-17 16:11:02,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:11:02,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 16:11:02,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:11:02,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 16:11:02,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=799, Unknown=0, NotChecked=0, Total=1056 [2023-11-17 16:11:02,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 206 [2023-11-17 16:11:02,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 4646 transitions, 132185 flow. Second operand has 33 states, 33 states have (on average 78.72727272727273) internal successors, (2598), 33 states have internal predecessors, (2598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:11:02,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:11:02,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 206 [2023-11-17 16:11:02,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:11:06,780 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-17 16:11:09,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-17 16:13:33,017 INFO L124 PetriNetUnfolderBase]: 23593/39956 cut-off events. [2023-11-17 16:13:33,017 INFO L125 PetriNetUnfolderBase]: For 1308594/1308594 co-relation queries the response was YES. [2023-11-17 16:13:33,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487477 conditions, 39956 events. 23593/39956 cut-off events. For 1308594/1308594 co-relation queries the response was YES. Maximal size of possible extension queue 1889. Compared 334096 event pairs, 18 based on Foata normal form. 1030/40986 useless extension candidates. Maximal degree in co-relation 486143. Up to 12623 conditions per place. [2023-11-17 16:13:33,927 INFO L140 encePairwiseOnDemand]: 201/206 looper letters, 3352 selfloop transitions, 6097 changer transitions 8/9459 dead transitions. [2023-11-17 16:13:33,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 9459 transitions, 290003 flow [2023-11-17 16:13:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-17 16:13:33,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-11-17 16:13:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 6383 transitions. [2023-11-17 16:13:33,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40240827134031015 [2023-11-17 16:13:33,932 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 6383 transitions. [2023-11-17 16:13:33,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 6383 transitions. [2023-11-17 16:13:33,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:33,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 6383 transitions. [2023-11-17 16:13:33,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 82.8961038961039) internal successors, (6383), 77 states have internal predecessors, (6383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 206.0) internal successors, (16068), 78 states have internal predecessors, (16068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,958 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 206.0) internal successors, (16068), 78 states have internal predecessors, (16068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:33,958 INFO L175 Difference]: Start difference. First operand has 576 places, 4646 transitions, 132185 flow. Second operand 77 states and 6383 transitions. [2023-11-17 16:13:33,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 9459 transitions, 290003 flow Received shutdown request... [2023-11-17 16:14:00,213 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:14:00,213 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 16:14:00,540 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:14:00,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-17 16:14:00,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 16:14:00,751 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 16:14:00,753 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:14:00,753 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:14:00,753 INFO L445 BasicCegarLoop]: Path program histogram: [19, 2, 2, 1] [2023-11-17 16:14:00,755 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:14:00,755 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:14:00,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:14:00 BasicIcfg [2023-11-17 16:14:00,757 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:14:00,757 INFO L158 Benchmark]: Toolchain (without parser) took 559315.99ms. Allocated memory was 197.1MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 139.2MB in the beginning and 892.6MB in the end (delta: -753.4MB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 16:14:00,757 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 197.1MB. Free memory is still 151.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:14:00,757 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.68ms. Allocated memory is still 197.1MB. Free memory was 139.1MB in the beginning and 127.7MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:14:00,757 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.39ms. Allocated memory is still 197.1MB. Free memory was 127.7MB in the beginning and 125.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:14:00,758 INFO L158 Benchmark]: Boogie Preprocessor took 22.06ms. Allocated memory is still 197.1MB. Free memory was 125.9MB in the beginning and 124.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:14:00,758 INFO L158 Benchmark]: RCFGBuilder took 351.37ms. Allocated memory was 197.1MB in the beginning and 237.0MB in the end (delta: 39.8MB). Free memory was 124.6MB in the beginning and 201.5MB in the end (delta: -77.0MB). Peak memory consumption was 16.2MB. Max. memory is 8.0GB. [2023-11-17 16:14:00,758 INFO L158 Benchmark]: TraceAbstraction took 558696.61ms. Allocated memory was 237.0MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 200.5MB in the beginning and 892.6MB in the end (delta: -692.2MB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. [2023-11-17 16:14:00,759 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 197.1MB. Free memory is still 151.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 215.68ms. Allocated memory is still 197.1MB. Free memory was 139.1MB in the beginning and 127.7MB in the end (delta: 11.4MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.39ms. Allocated memory is still 197.1MB. Free memory was 127.7MB in the beginning and 125.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.06ms. Allocated memory is still 197.1MB. Free memory was 125.9MB in the beginning and 124.6MB in the end (delta: 1.3MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 351.37ms. Allocated memory was 197.1MB in the beginning and 237.0MB in the end (delta: 39.8MB). Free memory was 124.6MB in the beginning and 201.5MB in the end (delta: -77.0MB). Peak memory consumption was 16.2MB. Max. memory is 8.0GB. * TraceAbstraction took 558696.61ms. Allocated memory was 237.0MB in the beginning and 3.6GB in the end (delta: 3.4GB). Free memory was 200.5MB in the beginning and 892.6MB in the end (delta: -692.2MB). Peak memory consumption was 2.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 96 PlacesBefore, 20 PlacesAfterwards, 97 TransitionsBefore, 15 TransitionsAfterwards, 812 CoEnabledTransitionPairs, 7 FixpointIterations, 52 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 12 ConcurrentYvCompositions, 6 ChoiceCompositions, 98 TotalNumberOfCompositions, 850 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 850, independent: 850, independent conditional: 0, independent unconditional: 850, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 586, independent: 586, independent conditional: 0, independent unconditional: 586, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 586, independent: 570, independent conditional: 0, independent unconditional: 570, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 16, independent: 16, independent conditional: 0, independent unconditional: 16, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 33, independent: 33, independent conditional: 0, independent unconditional: 33, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 850, independent: 264, independent conditional: 0, independent unconditional: 264, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 586, unknown conditional: 0, unknown unconditional: 586] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 127 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 558.6s, OverallIterations: 24, TraceHistogramMax: 9, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 501.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 3327 SdHoareTripleChecker+Valid, 64.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3327 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 61.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 792 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15588 IncrementalHoareTripleChecker+Invalid, 16382 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 792 mSolverCounterUnsat, 0 mSDtfsCounter, 15588 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1385 GetRequests, 523 SyntacticMatches, 16 SemanticMatches, 846 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12687 ImplicationChecksByTransitivity, 232.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132185occurred in iteration=23, InterpolantAutomatonStates: 617, 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: 0.2s SsaConstructionTime, 5.8s SatisfiabilityAnalysisTime, 43.3s InterpolantComputationTime, 877 NumberOfCodeBlocks, 873 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1224 ConstructedInterpolants, 0 QuantifiedInterpolants, 26054 SizeOfPredicates, 243 NumberOfNonLiveVariables, 2367 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 64 InterpolantComputations, 4 PerfectInterpolantSequences, 724/1545 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown