/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:03:38,578 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:03:38,639 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-NoLbe.epf [2023-12-05 21:03:38,668 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:03:38,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:03:38,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:03:38,669 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:03:38,670 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:03:38,670 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:03:38,673 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:03:38,673 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:03:38,673 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:03:38,674 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:03:38,674 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:03:38,675 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:03:38,675 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:03:38,675 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:03:38,675 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:03:38,675 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:03:38,675 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:03:38,675 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:03:38,676 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:03:38,676 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:03:38,676 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:03:38,676 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:03:38,677 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:03:38,677 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:03:38,677 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:03:38,677 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:03:38,677 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:03:38,678 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:03:38,678 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:03:38,678 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:03:38,678 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:03:38,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:03:38,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:03:38,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:03:38,910 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:03:38,910 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:03:38,911 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longest-2.i [2023-12-05 21:03:39,902 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:03:40,119 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:03:40,119 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longest-2.i [2023-12-05 21:03:40,134 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1affc90d2/8bda59db05c3444e92649c9d40108de2/FLAGf3cbe3236 [2023-12-05 21:03:40,148 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1affc90d2/8bda59db05c3444e92649c9d40108de2 [2023-12-05 21:03:40,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:03:40,151 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:03:40,153 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:03:40,153 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:03:40,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:03:40,156 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6efbb0e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40, skipping insertion in model container [2023-12-05 21:03:40,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,194 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:03:40,406 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:03:40,414 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:03:40,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:03:40,477 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:03:40,479 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:03:40,484 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:03:40,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40 WrapperNode [2023-12-05 21:03:40,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:03:40,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:03:40,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:03:40,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:03:40,490 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,520 INFO L138 Inliner]: procedures = 179, calls = 37, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 179 [2023-12-05 21:03:40,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:03:40,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:03:40,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:03:40,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:03:40,526 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,532 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,544 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,545 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,547 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:03:40,548 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:03:40,548 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:03:40,548 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:03:40,549 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (1/1) ... [2023-12-05 21:03:40,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:03:40,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:03:40,572 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) [2023-12-05 21:03:40,576 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 [2023-12-05 21:03:40,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:03:40,590 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:03:40,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:03:40,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:03:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:03:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:03:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:03:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:03:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:03:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:03:40,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:03:40,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:03:40,592 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:03:40,684 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:03:40,685 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:03:40,968 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:03:41,127 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:03:41,128 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-05 21:03:41,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:03:41 BoogieIcfgContainer [2023-12-05 21:03:41,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:03:41,130 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:03:41,130 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:03:41,133 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:03:41,133 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:03:40" (1/3) ... [2023-12-05 21:03:41,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f5e41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:03:41, skipping insertion in model container [2023-12-05 21:03:41,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:03:40" (2/3) ... [2023-12-05 21:03:41,134 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29f5e41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:03:41, skipping insertion in model container [2023-12-05 21:03:41,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:03:41" (3/3) ... [2023-12-05 21:03:41,135 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2.i [2023-12-05 21:03:41,147 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:03:41,148 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-12-05 21:03:41,148 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:03:41,212 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:03:41,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 132 transitions, 268 flow [2023-12-05 21:03:41,295 INFO L124 PetriNetUnfolderBase]: 8/145 cut-off events. [2023-12-05 21:03:41,295 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:41,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 145 events. 8/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 252 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2023-12-05 21:03:41,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 132 transitions, 268 flow [2023-12-05 21:03:41,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 132 transitions, 268 flow [2023-12-05 21:03:41,317 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:03:41,322 INFO L362 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=true, 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;@4779df9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:03:41,322 INFO L363 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2023-12-05 21:03:41,329 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:03:41,330 INFO L124 PetriNetUnfolderBase]: 1/27 cut-off events. [2023-12-05 21:03:41,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:41,330 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:41,330 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:41,331 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:03:41,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1813666574, now seen corresponding path program 1 times [2023-12-05 21:03:41,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:41,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981790388] [2023-12-05 21:03:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:41,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:41,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:41,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981790388] [2023-12-05 21:03:41,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981790388] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:41,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:41,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:41,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184729682] [2023-12-05 21:03:41,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:41,579 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:41,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:41,611 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 132 [2023-12-05 21:03:41,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 132 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:41,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 132 [2023-12-05 21:03:41,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:41,767 INFO L124 PetriNetUnfolderBase]: 52/308 cut-off events. [2023-12-05 21:03:41,767 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:41,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 308 events. 52/308 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1347 event pairs, 40 based on Foata normal form. 22/245 useless extension candidates. Maximal degree in co-relation 390. Up to 112 conditions per place. [2023-12-05 21:03:41,771 INFO L140 encePairwiseOnDemand]: 112/132 looper letters, 31 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2023-12-05 21:03:41,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 107 transitions, 282 flow [2023-12-05 21:03:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:41,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-12-05 21:03:41,788 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7196969696969697 [2023-12-05 21:03:41,789 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-12-05 21:03:41,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-12-05 21:03:41,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:41,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-12-05 21:03:41,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,801 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,804 INFO L308 CegarLoopForPetriNet]: 128 programPoint places, -20 predicate places. [2023-12-05 21:03:41,804 INFO L500 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 282 flow [2023-12-05 21:03:41,805 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,805 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:41,805 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:41,805 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:03:41,806 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:03:41,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:41,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1813666575, now seen corresponding path program 1 times [2023-12-05 21:03:41,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:41,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640357966] [2023-12-05 21:03:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:41,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:41,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:41,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640357966] [2023-12-05 21:03:41,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640357966] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:41,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:41,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:41,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604237673] [2023-12-05 21:03:41,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:41,923 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:41,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:41,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:41,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:41,924 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 132 [2023-12-05 21:03:41,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:41,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 132 [2023-12-05 21:03:41,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:41,987 INFO L124 PetriNetUnfolderBase]: 28/208 cut-off events. [2023-12-05 21:03:41,987 INFO L125 PetriNetUnfolderBase]: For 25/37 co-relation queries the response was YES. [2023-12-05 21:03:41,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 208 events. 28/208 cut-off events. For 25/37 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 663 event pairs, 20 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 313. Up to 68 conditions per place. [2023-12-05 21:03:41,992 INFO L140 encePairwiseOnDemand]: 130/132 looper letters, 29 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-12-05 21:03:41,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 106 transitions, 338 flow [2023-12-05 21:03:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:41,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-12-05 21:03:41,993 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2023-12-05 21:03:41,994 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-12-05 21:03:41,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-12-05 21:03:41,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:41,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-12-05 21:03:41,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,997 INFO L308 CegarLoopForPetriNet]: 128 programPoint places, -19 predicate places. [2023-12-05 21:03:41,997 INFO L500 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 338 flow [2023-12-05 21:03:41,997 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:41,998 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:41,998 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:41,998 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:03:41,998 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:03:41,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:41,999 INFO L85 PathProgramCache]: Analyzing trace with hash 253041161, now seen corresponding path program 1 times [2023-12-05 21:03:41,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:41,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631389056] [2023-12-05 21:03:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:41,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:42,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:42,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631389056] [2023-12-05 21:03:42,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631389056] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:42,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:42,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:03:42,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702626119] [2023-12-05 21:03:42,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:42,194 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:03:42,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:42,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:03:42,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:03:42,198 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2023-12-05 21:03:42,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 338 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:42,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2023-12-05 21:03:42,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:42,271 INFO L124 PetriNetUnfolderBase]: 26/202 cut-off events. [2023-12-05 21:03:42,271 INFO L125 PetriNetUnfolderBase]: For 72/84 co-relation queries the response was YES. [2023-12-05 21:03:42,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 202 events. 26/202 cut-off events. For 72/84 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 629 event pairs, 18 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 354. Up to 65 conditions per place. [2023-12-05 21:03:42,277 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 29 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-12-05 21:03:42,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 388 flow [2023-12-05 21:03:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:03:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:03:42,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2023-12-05 21:03:42,278 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6382575757575758 [2023-12-05 21:03:42,278 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2023-12-05 21:03:42,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2023-12-05 21:03:42,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:42,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2023-12-05 21:03:42,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,281 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,282 INFO L308 CegarLoopForPetriNet]: 128 programPoint places, -18 predicate places. [2023-12-05 21:03:42,282 INFO L500 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 388 flow [2023-12-05 21:03:42,283 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,283 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:42,283 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:42,283 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:03:42,284 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:03:42,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:42,285 INFO L85 PathProgramCache]: Analyzing trace with hash 253041162, now seen corresponding path program 1 times [2023-12-05 21:03:42,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:42,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078928034] [2023-12-05 21:03:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:42,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:42,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:42,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:42,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078928034] [2023-12-05 21:03:42,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078928034] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:42,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:42,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:03:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486972912] [2023-12-05 21:03:42,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:42,486 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:03:42,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:03:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:03:42,489 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 132 [2023-12-05 21:03:42,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:42,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 132 [2023-12-05 21:03:42,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:42,538 INFO L124 PetriNetUnfolderBase]: 24/196 cut-off events. [2023-12-05 21:03:42,538 INFO L125 PetriNetUnfolderBase]: For 135/141 co-relation queries the response was YES. [2023-12-05 21:03:42,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 196 events. 24/196 cut-off events. For 135/141 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 588 event pairs, 16 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 383. Up to 59 conditions per place. [2023-12-05 21:03:42,539 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 25 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2023-12-05 21:03:42,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 426 flow [2023-12-05 21:03:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:03:42,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:03:42,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-12-05 21:03:42,540 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6761363636363636 [2023-12-05 21:03:42,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-12-05 21:03:42,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-12-05 21:03:42,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:42,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-12-05 21:03:42,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,543 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,544 INFO L308 CegarLoopForPetriNet]: 128 programPoint places, -17 predicate places. [2023-12-05 21:03:42,545 INFO L500 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 426 flow [2023-12-05 21:03:42,545 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,545 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:42,545 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:42,545 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:03:42,545 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:03:42,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:42,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1350829373, now seen corresponding path program 1 times [2023-12-05 21:03:42,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:42,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94840819] [2023-12-05 21:03:42,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:42,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:03:42,555 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:03:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:03:42,579 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:03:42,580 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:03:42,580 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (62 of 63 remaining) [2023-12-05 21:03:42,581 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 63 remaining) [2023-12-05 21:03:42,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 63 remaining) [2023-12-05 21:03:42,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 63 remaining) [2023-12-05 21:03:42,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 63 remaining) [2023-12-05 21:03:42,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 63 remaining) [2023-12-05 21:03:42,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 63 remaining) [2023-12-05 21:03:42,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 63 remaining) [2023-12-05 21:03:42,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 63 remaining) [2023-12-05 21:03:42,582 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 63 remaining) [2023-12-05 21:03:42,583 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 63 remaining) [2023-12-05 21:03:42,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 63 remaining) [2023-12-05 21:03:42,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 63 remaining) [2023-12-05 21:03:42,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 63 remaining) [2023-12-05 21:03:42,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 63 remaining) [2023-12-05 21:03:42,584 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 63 remaining) [2023-12-05 21:03:42,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 63 remaining) [2023-12-05 21:03:42,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 63 remaining) [2023-12-05 21:03:42,587 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (36 of 63 remaining) [2023-12-05 21:03:42,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 63 remaining) [2023-12-05 21:03:42,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 63 remaining) [2023-12-05 21:03:42,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 63 remaining) [2023-12-05 21:03:42,588 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 63 remaining) [2023-12-05 21:03:42,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 63 remaining) [2023-12-05 21:03:42,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 63 remaining) [2023-12-05 21:03:42,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 63 remaining) [2023-12-05 21:03:42,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 63 remaining) [2023-12-05 21:03:42,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 63 remaining) [2023-12-05 21:03:42,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 63 remaining) [2023-12-05 21:03:42,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 63 remaining) [2023-12-05 21:03:42,589 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 63 remaining) [2023-12-05 21:03:42,590 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 63 remaining) [2023-12-05 21:03:42,592 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 63 remaining) [2023-12-05 21:03:42,592 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 63 remaining) [2023-12-05 21:03:42,593 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 63 remaining) [2023-12-05 21:03:42,593 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 63 remaining) [2023-12-05 21:03:42,593 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 63 remaining) [2023-12-05 21:03:42,593 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 63 remaining) [2023-12-05 21:03:42,593 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 63 remaining) [2023-12-05 21:03:42,593 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 63 remaining) [2023-12-05 21:03:42,594 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 63 remaining) [2023-12-05 21:03:42,594 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 63 remaining) [2023-12-05 21:03:42,594 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 63 remaining) [2023-12-05 21:03:42,594 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 63 remaining) [2023-12-05 21:03:42,594 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 63 remaining) [2023-12-05 21:03:42,595 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (9 of 63 remaining) [2023-12-05 21:03:42,595 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 63 remaining) [2023-12-05 21:03:42,595 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 63 remaining) [2023-12-05 21:03:42,595 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 63 remaining) [2023-12-05 21:03:42,595 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 63 remaining) [2023-12-05 21:03:42,595 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (4 of 63 remaining) [2023-12-05 21:03:42,595 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 63 remaining) [2023-12-05 21:03:42,595 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 63 remaining) [2023-12-05 21:03:42,596 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 63 remaining) [2023-12-05 21:03:42,596 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 63 remaining) [2023-12-05 21:03:42,596 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:03:42,596 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:03:42,598 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:03:42,598 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:03:42,663 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:03:42,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 229 transitions, 468 flow [2023-12-05 21:03:42,700 INFO L124 PetriNetUnfolderBase]: 15/257 cut-off events. [2023-12-05 21:03:42,700 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:03:42,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 257 events. 15/257 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 711 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 207. Up to 6 conditions per place. [2023-12-05 21:03:42,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 229 transitions, 468 flow [2023-12-05 21:03:42,740 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 229 transitions, 468 flow [2023-12-05 21:03:42,742 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:03:42,742 INFO L362 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=true, 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;@4779df9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:03:42,742 INFO L363 AbstractCegarLoop]: Starting to check reachability of 93 error locations. [2023-12-05 21:03:42,745 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:03:42,745 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-12-05 21:03:42,745 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:42,745 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:42,745 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:42,745 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:03:42,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:42,745 INFO L85 PathProgramCache]: Analyzing trace with hash 729519379, now seen corresponding path program 1 times [2023-12-05 21:03:42,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:42,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800656003] [2023-12-05 21:03:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:42,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:42,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:42,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800656003] [2023-12-05 21:03:42,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800656003] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:42,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:42,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:42,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910387283] [2023-12-05 21:03:42,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:42,777 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:42,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:42,778 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 229 [2023-12-05 21:03:42,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 229 transitions, 468 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:42,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:42,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 229 [2023-12-05 21:03:42,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:43,842 INFO L124 PetriNetUnfolderBase]: 3095/9409 cut-off events. [2023-12-05 21:03:43,842 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-12-05 21:03:43,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13958 conditions, 9409 events. 3095/9409 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 96603 event pairs, 2344 based on Foata normal form. 699/6760 useless extension candidates. Maximal degree in co-relation 2816. Up to 4474 conditions per place. [2023-12-05 21:03:43,907 INFO L140 encePairwiseOnDemand]: 193/229 looper letters, 54 selfloop transitions, 1 changer transitions 0/187 dead transitions. [2023-12-05 21:03:43,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 187 transitions, 494 flow [2023-12-05 21:03:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-12-05 21:03:43,909 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7248908296943232 [2023-12-05 21:03:43,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-12-05 21:03:43,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-12-05 21:03:43,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:43,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-12-05 21:03:43,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:43,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:43,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:43,914 INFO L308 CegarLoopForPetriNet]: 221 programPoint places, -35 predicate places. [2023-12-05 21:03:43,914 INFO L500 AbstractCegarLoop]: Abstraction has has 186 places, 187 transitions, 494 flow [2023-12-05 21:03:43,915 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:43,915 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:43,915 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:43,915 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:03:43,916 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:03:43,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:43,916 INFO L85 PathProgramCache]: Analyzing trace with hash 729519380, now seen corresponding path program 1 times [2023-12-05 21:03:43,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:43,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30765897] [2023-12-05 21:03:43,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:43,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:43,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:43,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30765897] [2023-12-05 21:03:43,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30765897] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:43,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:43,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:43,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876868144] [2023-12-05 21:03:43,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:43,952 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:43,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:43,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:43,953 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 229 [2023-12-05 21:03:43,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 187 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:43,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:43,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 229 [2023-12-05 21:03:43,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:44,677 INFO L124 PetriNetUnfolderBase]: 1899/6058 cut-off events. [2023-12-05 21:03:44,677 INFO L125 PetriNetUnfolderBase]: For 657/1749 co-relation queries the response was YES. [2023-12-05 21:03:44,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11773 conditions, 6058 events. 1899/6058 cut-off events. For 657/1749 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 58028 event pairs, 1402 based on Foata normal form. 0/4147 useless extension candidates. Maximal degree in co-relation 2297. Up to 2817 conditions per place. [2023-12-05 21:03:44,712 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 52 selfloop transitions, 1 changer transitions 0/186 dead transitions. [2023-12-05 21:03:44,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 186 transitions, 596 flow [2023-12-05 21:03:44,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:44,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-12-05 21:03:44,714 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6768558951965066 [2023-12-05 21:03:44,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-12-05 21:03:44,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-12-05 21:03:44,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:44,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-12-05 21:03:44,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:44,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:44,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:44,717 INFO L308 CegarLoopForPetriNet]: 221 programPoint places, -34 predicate places. [2023-12-05 21:03:44,717 INFO L500 AbstractCegarLoop]: Abstraction has has 187 places, 186 transitions, 596 flow [2023-12-05 21:03:44,718 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:44,718 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:44,718 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:44,718 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:03:44,718 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:03:44,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash 578343561, now seen corresponding path program 1 times [2023-12-05 21:03:44,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:44,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414255375] [2023-12-05 21:03:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:44,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:44,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:44,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:44,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414255375] [2023-12-05 21:03:44,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414255375] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:44,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:44,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:03:44,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557932445] [2023-12-05 21:03:44,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:44,811 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:03:44,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:44,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:03:44,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:03:44,812 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 229 [2023-12-05 21:03:44,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 186 transitions, 596 flow. Second operand has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:44,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:44,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 229 [2023-12-05 21:03:44,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:45,380 INFO L124 PetriNetUnfolderBase]: 1607/5328 cut-off events. [2023-12-05 21:03:45,381 INFO L125 PetriNetUnfolderBase]: For 1548/2676 co-relation queries the response was YES. [2023-12-05 21:03:45,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12495 conditions, 5328 events. 1607/5328 cut-off events. For 1548/2676 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 50410 event pairs, 1154 based on Foata normal form. 0/3784 useless extension candidates. Maximal degree in co-relation 2618. Up to 2364 conditions per place. [2023-12-05 21:03:45,419 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 50 selfloop transitions, 2 changer transitions 0/182 dead transitions. [2023-12-05 21:03:45,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 182 transitions, 676 flow [2023-12-05 21:03:45,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:03:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:03:45,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-12-05 21:03:45,421 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6462882096069869 [2023-12-05 21:03:45,421 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-12-05 21:03:45,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-12-05 21:03:45,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:45,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-12-05 21:03:45,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:45,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:45,424 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:45,425 INFO L308 CegarLoopForPetriNet]: 221 programPoint places, -35 predicate places. [2023-12-05 21:03:45,425 INFO L500 AbstractCegarLoop]: Abstraction has has 186 places, 182 transitions, 676 flow [2023-12-05 21:03:45,425 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:45,425 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:45,425 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:45,426 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:03:45,426 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:03:45,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:45,426 INFO L85 PathProgramCache]: Analyzing trace with hash 578343562, now seen corresponding path program 1 times [2023-12-05 21:03:45,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:45,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750106816] [2023-12-05 21:03:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:45,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:45,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750106816] [2023-12-05 21:03:45,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750106816] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:45,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:45,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:03:45,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617294303] [2023-12-05 21:03:45,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:45,519 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:03:45,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:45,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:03:45,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:03:45,520 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 229 [2023-12-05 21:03:45,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 182 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:45,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:45,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 229 [2023-12-05 21:03:45,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:45,991 INFO L124 PetriNetUnfolderBase]: 1339/4638 cut-off events. [2023-12-05 21:03:45,991 INFO L125 PetriNetUnfolderBase]: For 2536/3190 co-relation queries the response was YES. [2023-12-05 21:03:46,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12503 conditions, 4638 events. 1339/4638 cut-off events. For 2536/3190 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 43679 event pairs, 930 based on Foata normal form. 0/3425 useless extension candidates. Maximal degree in co-relation 2835. Up to 1948 conditions per place. [2023-12-05 21:03:46,029 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 44 selfloop transitions, 2 changer transitions 0/178 dead transitions. [2023-12-05 21:03:46,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 178 transitions, 736 flow [2023-12-05 21:03:46,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:03:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:03:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-12-05 21:03:46,031 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.665938864628821 [2023-12-05 21:03:46,031 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-12-05 21:03:46,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-12-05 21:03:46,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:46,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-12-05 21:03:46,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:46,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:46,034 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:46,035 INFO L308 CegarLoopForPetriNet]: 221 programPoint places, -36 predicate places. [2023-12-05 21:03:46,035 INFO L500 AbstractCegarLoop]: Abstraction has has 185 places, 178 transitions, 736 flow [2023-12-05 21:03:46,036 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:46,036 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:46,036 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:46,036 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:03:46,036 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:03:46,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:46,036 INFO L85 PathProgramCache]: Analyzing trace with hash 748695334, now seen corresponding path program 1 times [2023-12-05 21:03:46,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:46,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192348963] [2023-12-05 21:03:46,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:46,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:03:46,048 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:03:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:03:46,060 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:03:46,060 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (92 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 93 remaining) [2023-12-05 21:03:46,061 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (71 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 93 remaining) [2023-12-05 21:03:46,062 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (66 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 93 remaining) [2023-12-05 21:03:46,063 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 93 remaining) [2023-12-05 21:03:46,064 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (39 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (34 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 93 remaining) [2023-12-05 21:03:46,065 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 93 remaining) [2023-12-05 21:03:46,066 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 93 remaining) [2023-12-05 21:03:46,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 93 remaining) [2023-12-05 21:03:46,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 93 remaining) [2023-12-05 21:03:46,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 93 remaining) [2023-12-05 21:03:46,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 93 remaining) [2023-12-05 21:03:46,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 93 remaining) [2023-12-05 21:03:46,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 93 remaining) [2023-12-05 21:03:46,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 93 remaining) [2023-12-05 21:03:46,067 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (9 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (4 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 93 remaining) [2023-12-05 21:03:46,068 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 93 remaining) [2023-12-05 21:03:46,069 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:03:46,069 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:03:46,069 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:03:46,069 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:03:46,141 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:03:46,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 314 places, 326 transitions, 670 flow [2023-12-05 21:03:46,192 INFO L124 PetriNetUnfolderBase]: 22/369 cut-off events. [2023-12-05 21:03:46,193 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:03:46,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 369 events. 22/369 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1305 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-12-05 21:03:46,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 314 places, 326 transitions, 670 flow [2023-12-05 21:03:46,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 326 transitions, 670 flow [2023-12-05 21:03:46,206 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:03:46,206 INFO L362 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=true, 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;@4779df9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:03:46,206 INFO L363 AbstractCegarLoop]: Starting to check reachability of 123 error locations. [2023-12-05 21:03:46,208 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:03:46,208 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-12-05 21:03:46,208 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:03:46,208 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:46,208 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:46,208 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-12-05 21:03:46,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:46,209 INFO L85 PathProgramCache]: Analyzing trace with hash 574041625, now seen corresponding path program 1 times [2023-12-05 21:03:46,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:46,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52678684] [2023-12-05 21:03:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:46,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:46,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:46,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52678684] [2023-12-05 21:03:46,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52678684] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:46,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:46,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:46,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283735438] [2023-12-05 21:03:46,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:46,231 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:46,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:46,232 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 326 [2023-12-05 21:03:46,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 326 transitions, 670 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:46,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:46,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 326 [2023-12-05 21:03:46,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:18,807 INFO L124 PetriNetUnfolderBase]: 116210/285417 cut-off events. [2023-12-05 21:04:18,808 INFO L125 PetriNetUnfolderBase]: For 4357/4357 co-relation queries the response was YES. [2023-12-05 21:04:20,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435627 conditions, 285417 events. 116210/285417 cut-off events. For 4357/4357 co-relation queries the response was YES. Maximal size of possible extension queue 8011. Compared 4197247 event pairs, 87528 based on Foata normal form. 19167/196327 useless extension candidates. Maximal degree in co-relation 13952. Up to 148194 conditions per place. [2023-12-05 21:04:22,512 INFO L140 encePairwiseOnDemand]: 274/326 looper letters, 77 selfloop transitions, 1 changer transitions 0/267 dead transitions. [2023-12-05 21:04:22,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 267 transitions, 708 flow [2023-12-05 21:04:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:22,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:22,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2023-12-05 21:04:22,514 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7269938650306749 [2023-12-05 21:04:22,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2023-12-05 21:04:22,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2023-12-05 21:04:22,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:22,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2023-12-05 21:04:22,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:22,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:22,518 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:22,518 INFO L308 CegarLoopForPetriNet]: 314 programPoint places, -50 predicate places. [2023-12-05 21:04:22,518 INFO L500 AbstractCegarLoop]: Abstraction has has 264 places, 267 transitions, 708 flow [2023-12-05 21:04:22,519 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:22,519 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:22,519 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:22,519 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:04:22,519 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-12-05 21:04:22,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:22,519 INFO L85 PathProgramCache]: Analyzing trace with hash 574041626, now seen corresponding path program 1 times [2023-12-05 21:04:22,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:22,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565099197] [2023-12-05 21:04:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:22,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:22,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:22,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565099197] [2023-12-05 21:04:22,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565099197] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:22,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:22,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:04:22,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027725269] [2023-12-05 21:04:22,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:22,547 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:04:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:22,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:04:22,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:04:22,548 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 326 [2023-12-05 21:04:22,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 267 transitions, 708 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:22,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:22,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 326 [2023-12-05 21:04:22,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:04:46,425 INFO L124 PetriNetUnfolderBase]: 73655/185094 cut-off events. [2023-12-05 21:04:46,425 INFO L125 PetriNetUnfolderBase]: For 19529/49971 co-relation queries the response was YES. [2023-12-05 21:04:47,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377010 conditions, 185094 events. 73655/185094 cut-off events. For 19529/49971 co-relation queries the response was YES. Maximal size of possible extension queue 5290. Compared 2625054 event pairs, 54620 based on Foata normal form. 0/120352 useless extension candidates. Maximal degree in co-relation 11760. Up to 94947 conditions per place. [2023-12-05 21:04:49,350 INFO L140 encePairwiseOnDemand]: 324/326 looper letters, 75 selfloop transitions, 1 changer transitions 0/266 dead transitions. [2023-12-05 21:04:49,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 266 transitions, 856 flow [2023-12-05 21:04:49,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:04:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:04:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-12-05 21:04:49,354 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6768916155419223 [2023-12-05 21:04:49,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-12-05 21:04:49,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-12-05 21:04:49,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:04:49,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-12-05 21:04:49,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,358 INFO L308 CegarLoopForPetriNet]: 314 programPoint places, -49 predicate places. [2023-12-05 21:04:49,358 INFO L500 AbstractCegarLoop]: Abstraction has has 265 places, 266 transitions, 856 flow [2023-12-05 21:04:49,359 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,359 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:04:49,359 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:04:49,359 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:04:49,359 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-12-05 21:04:49,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:04:49,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1284264791, now seen corresponding path program 1 times [2023-12-05 21:04:49,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:04:49,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295685450] [2023-12-05 21:04:49,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:04:49,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:04:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:04:49,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:04:49,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:04:49,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295685450] [2023-12-05 21:04:49,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295685450] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:04:49,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:04:49,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:04:49,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060891736] [2023-12-05 21:04:49,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:04:49,460 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:04:49,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:04:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:04:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:04:49,463 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 326 [2023-12-05 21:04:49,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 266 transitions, 856 flow. Second operand has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:04:49,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:04:49,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 326 [2023-12-05 21:04:49,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand