/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/goblint-regression/28-race_reach_94-alloc_region_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:18:49,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:18:49,197 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 21:18:49,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:18:49,240 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:18:49,240 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:18:49,241 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:18:49,241 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:18:49,241 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:18:49,241 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:18:49,242 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:18:49,242 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:18:49,242 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:18:49,242 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:18:49,243 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:18:49,243 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:18:49,243 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:18:49,243 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:18:49,244 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:18:49,260 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:18:49,263 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:18:49,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:18:49,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:18:49,265 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:18:49,265 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:18:49,265 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:18:49,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:18:49,266 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:18:49,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:18:49,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:18:49,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:18:49,266 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:18:49,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:18:49,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:18:49,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:18:49,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:18:49,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:18:49,557 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:18:49,572 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:18:49,573 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i [2023-12-05 21:18:50,592 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:18:50,829 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:18:50,829 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_94-alloc_region_racing.i [2023-12-05 21:18:50,846 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8f6de468/7de0332ae11d43209ac1729e99634dee/FLAG1ffc1f0f1 [2023-12-05 21:18:50,857 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8f6de468/7de0332ae11d43209ac1729e99634dee [2023-12-05 21:18:50,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:18:50,860 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:18:50,861 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:18:50,861 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:18:50,864 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:18:50,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:18:50" (1/1) ... [2023-12-05 21:18:50,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@592ee444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:50, skipping insertion in model container [2023-12-05 21:18:50,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:18:50" (1/1) ... [2023-12-05 21:18:50,916 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:18:51,308 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:18:51,341 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:18:51,383 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:18:51,441 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:18:51,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51 WrapperNode [2023-12-05 21:18:51,441 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:18:51,442 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:18:51,442 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:18:51,442 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:18:51,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,471 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,514 INFO L138 Inliner]: procedures = 378, calls = 83, calls flagged for inlining = 10, calls inlined = 11, statements flattened = 275 [2023-12-05 21:18:51,514 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:18:51,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:18:51,515 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:18:51,515 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:18:51,521 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,560 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,562 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,563 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,565 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:18:51,566 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:18:51,566 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:18:51,566 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:18:51,567 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (1/1) ... [2023-12-05 21:18:51,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:18:51,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:51,605 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 21:18:51,625 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 21:18:51,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:18:51,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-05 21:18:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:18:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-05 21:18:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:18:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:18:51,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:18:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:18:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-05 21:18:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:18:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-05 21:18:51,633 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:18:51,634 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:18:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:18:51,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:18:51,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:18:51,635 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 21:18:51,808 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:18:51,810 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:18:52,221 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:18:52,244 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:18:52,244 INFO L309 CfgBuilder]: Removed 23 assume(true) statements. [2023-12-05 21:18:52,246 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:18:52 BoogieIcfgContainer [2023-12-05 21:18:52,246 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:18:52,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:18:52,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:18:52,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:18:52,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:18:50" (1/3) ... [2023-12-05 21:18:52,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c480a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:18:52, skipping insertion in model container [2023-12-05 21:18:52,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:18:51" (2/3) ... [2023-12-05 21:18:52,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c480a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:18:52, skipping insertion in model container [2023-12-05 21:18:52,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:18:52" (3/3) ... [2023-12-05 21:18:52,251 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_94-alloc_region_racing.i [2023-12-05 21:18:52,263 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:18:52,263 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2023-12-05 21:18:52,263 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:18:52,315 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-05 21:18:52,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 302 places, 330 transitions, 667 flow [2023-12-05 21:18:52,435 INFO L124 PetriNetUnfolderBase]: 48/480 cut-off events. [2023-12-05 21:18:52,435 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:18:52,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 480 events. 48/480 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1858 event pairs, 0 based on Foata normal form. 0/341 useless extension candidates. Maximal degree in co-relation 267. Up to 8 conditions per place. [2023-12-05 21:18:52,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 302 places, 330 transitions, 667 flow [2023-12-05 21:18:52,454 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 302 places, 330 transitions, 667 flow [2023-12-05 21:18:52,461 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:18:52,466 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;@4c4d28b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:18:52,466 INFO L363 AbstractCegarLoop]: Starting to check reachability of 79 error locations. [2023-12-05 21:18:52,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:18:52,471 INFO L124 PetriNetUnfolderBase]: 0/35 cut-off events. [2023-12-05 21:18:52,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:18:52,471 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:52,471 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:52,472 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:18:52,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1081377721, now seen corresponding path program 1 times [2023-12-05 21:18:52,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:52,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357477035] [2023-12-05 21:18:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:52,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:52,819 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 21:18:52,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:52,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357477035] [2023-12-05 21:18:52,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357477035] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:52,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:52,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:18:52,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540261715] [2023-12-05 21:18:52,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:52,827 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:18:52,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:18:52,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:18:52,865 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 330 [2023-12-05 21:18:52,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 330 transitions, 667 flow. Second operand has 5 states, 5 states have (on average 204.2) internal successors, (1021), 5 states have internal predecessors, (1021), 0 states have call successors, (0), 0 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 21:18:52,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:52,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 330 [2023-12-05 21:18:52,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:53,715 INFO L124 PetriNetUnfolderBase]: 1442/6031 cut-off events. [2023-12-05 21:18:53,716 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-12-05 21:18:53,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8928 conditions, 6031 events. 1442/6031 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 58748 event pairs, 1344 based on Foata normal form. 741/5617 useless extension candidates. Maximal degree in co-relation 8666. Up to 2820 conditions per place. [2023-12-05 21:18:53,831 INFO L140 encePairwiseOnDemand]: 297/330 looper letters, 122 selfloop transitions, 3 changer transitions 3/326 dead transitions. [2023-12-05 21:18:53,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 326 transitions, 915 flow [2023-12-05 21:18:53,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:18:53,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:18:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 978 transitions. [2023-12-05 21:18:53,843 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.740909090909091 [2023-12-05 21:18:53,844 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 978 transitions. [2023-12-05 21:18:53,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 978 transitions. [2023-12-05 21:18:53,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:53,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 978 transitions. [2023-12-05 21:18:53,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 244.5) internal successors, (978), 4 states have internal predecessors, (978), 0 states have call successors, (0), 0 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 21:18:53,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 21:18:53,858 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 21:18:53,860 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, -6 predicate places. [2023-12-05 21:18:53,861 INFO L500 AbstractCegarLoop]: Abstraction has has 296 places, 326 transitions, 915 flow [2023-12-05 21:18:53,861 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.2) internal successors, (1021), 5 states have internal predecessors, (1021), 0 states have call successors, (0), 0 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 21:18:53,861 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:53,862 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:53,862 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:18:53,862 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:18:53,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1081377720, now seen corresponding path program 1 times [2023-12-05 21:18:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:53,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064082643] [2023-12-05 21:18:53,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:53,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:53,992 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 21:18:53,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:53,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064082643] [2023-12-05 21:18:53,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064082643] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:53,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:53,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:18:53,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910760486] [2023-12-05 21:18:53,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:53,994 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:18:53,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:18:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:18:53,996 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 330 [2023-12-05 21:18:53,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 326 transitions, 915 flow. Second operand has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 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 21:18:53,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:53,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 330 [2023-12-05 21:18:53,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:55,065 INFO L124 PetriNetUnfolderBase]: 2437/8490 cut-off events. [2023-12-05 21:18:55,066 INFO L125 PetriNetUnfolderBase]: For 1598/1969 co-relation queries the response was YES. [2023-12-05 21:18:55,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17139 conditions, 8490 events. 2437/8490 cut-off events. For 1598/1969 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 87091 event pairs, 2310 based on Foata normal form. 2/6980 useless extension candidates. Maximal degree in co-relation 16805. Up to 4788 conditions per place. [2023-12-05 21:18:55,111 INFO L140 encePairwiseOnDemand]: 323/330 looper letters, 190 selfloop transitions, 4 changer transitions 8/374 dead transitions. [2023-12-05 21:18:55,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 374 transitions, 1471 flow [2023-12-05 21:18:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:18:55,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:18:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1085 transitions. [2023-12-05 21:18:55,114 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6575757575757576 [2023-12-05 21:18:55,114 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1085 transitions. [2023-12-05 21:18:55,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1085 transitions. [2023-12-05 21:18:55,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:55,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1085 transitions. [2023-12-05 21:18:55,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.0) internal successors, (1085), 5 states have internal predecessors, (1085), 0 states have call successors, (0), 0 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 21:18:55,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 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 21:18:55,120 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 330.0) internal successors, (1980), 6 states have internal predecessors, (1980), 0 states have call successors, (0), 0 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 21:18:55,121 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, -5 predicate places. [2023-12-05 21:18:55,121 INFO L500 AbstractCegarLoop]: Abstraction has has 297 places, 374 transitions, 1471 flow [2023-12-05 21:18:55,121 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 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 21:18:55,121 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:55,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:55,122 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:18:55,122 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:18:55,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash -372585645, now seen corresponding path program 1 times [2023-12-05 21:18:55,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:55,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225386065] [2023-12-05 21:18:55,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:55,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:55,246 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 21:18:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:55,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225386065] [2023-12-05 21:18:55,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225386065] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:55,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:55,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:18:55,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041093997] [2023-12-05 21:18:55,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:55,247 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:18:55,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:55,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:18:55,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:18:55,249 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 330 [2023-12-05 21:18:55,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 374 transitions, 1471 flow. Second operand has 7 states, 7 states have (on average 186.57142857142858) internal successors, (1306), 7 states have internal predecessors, (1306), 0 states have call successors, (0), 0 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 21:18:55,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:55,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 330 [2023-12-05 21:18:55,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:56,484 INFO L124 PetriNetUnfolderBase]: 2627/8963 cut-off events. [2023-12-05 21:18:56,484 INFO L125 PetriNetUnfolderBase]: For 5048/5936 co-relation queries the response was YES. [2023-12-05 21:18:56,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22165 conditions, 8963 events. 2627/8963 cut-off events. For 5048/5936 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 91460 event pairs, 2371 based on Foata normal form. 0/7417 useless extension candidates. Maximal degree in co-relation 21763. Up to 4902 conditions per place. [2023-12-05 21:18:56,538 INFO L140 encePairwiseOnDemand]: 315/330 looper letters, 183 selfloop transitions, 12 changer transitions 8/403 dead transitions. [2023-12-05 21:18:56,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 403 transitions, 2051 flow [2023-12-05 21:18:56,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-05 21:18:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-12-05 21:18:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2351 transitions. [2023-12-05 21:18:56,544 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5936868686868687 [2023-12-05 21:18:56,544 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2351 transitions. [2023-12-05 21:18:56,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2351 transitions. [2023-12-05 21:18:56,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:56,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2351 transitions. [2023-12-05 21:18:56,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 195.91666666666666) internal successors, (2351), 12 states have internal predecessors, (2351), 0 states have call successors, (0), 0 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 21:18:56,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 330.0) internal successors, (4290), 13 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 21:18:56,557 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 330.0) internal successors, (4290), 13 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 21:18:56,558 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, 3 predicate places. [2023-12-05 21:18:56,558 INFO L500 AbstractCegarLoop]: Abstraction has has 305 places, 403 transitions, 2051 flow [2023-12-05 21:18:56,559 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 186.57142857142858) internal successors, (1306), 7 states have internal predecessors, (1306), 0 states have call successors, (0), 0 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 21:18:56,559 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:56,559 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:56,559 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:18:56,560 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:18:56,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:56,560 INFO L85 PathProgramCache]: Analyzing trace with hash -372585644, now seen corresponding path program 1 times [2023-12-05 21:18:56,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:56,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079641137] [2023-12-05 21:18:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:56,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:56,726 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 21:18:56,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:56,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079641137] [2023-12-05 21:18:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079641137] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:56,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:56,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:18:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153805276] [2023-12-05 21:18:56,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:56,727 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:18:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:18:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:18:56,729 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 330 [2023-12-05 21:18:56,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 403 transitions, 2051 flow. Second operand has 7 states, 7 states have (on average 188.42857142857142) internal successors, (1319), 7 states have internal predecessors, (1319), 0 states have call successors, (0), 0 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 21:18:56,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:56,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 330 [2023-12-05 21:18:56,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:58,061 INFO L124 PetriNetUnfolderBase]: 2690/9031 cut-off events. [2023-12-05 21:18:58,062 INFO L125 PetriNetUnfolderBase]: For 12493/14387 co-relation queries the response was YES. [2023-12-05 21:18:58,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26523 conditions, 9031 events. 2690/9031 cut-off events. For 12493/14387 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 91721 event pairs, 2424 based on Foata normal form. 2/8609 useless extension candidates. Maximal degree in co-relation 26054. Up to 4908 conditions per place. [2023-12-05 21:18:58,109 INFO L140 encePairwiseOnDemand]: 318/330 looper letters, 171 selfloop transitions, 10 changer transitions 8/401 dead transitions. [2023-12-05 21:18:58,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 401 transitions, 2417 flow [2023-12-05 21:18:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-05 21:18:58,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-12-05 21:18:58,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2152 transitions. [2023-12-05 21:18:58,113 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5928374655647383 [2023-12-05 21:18:58,113 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2152 transitions. [2023-12-05 21:18:58,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2152 transitions. [2023-12-05 21:18:58,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:58,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2152 transitions. [2023-12-05 21:18:58,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 195.63636363636363) internal successors, (2152), 11 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:58,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 330.0) internal successors, (3960), 12 states have internal predecessors, (3960), 0 states have call successors, (0), 0 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 21:18:58,122 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 330.0) internal successors, (3960), 12 states have internal predecessors, (3960), 0 states have call successors, (0), 0 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 21:18:58,122 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, 11 predicate places. [2023-12-05 21:18:58,123 INFO L500 AbstractCegarLoop]: Abstraction has has 313 places, 401 transitions, 2417 flow [2023-12-05 21:18:58,123 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 188.42857142857142) internal successors, (1319), 7 states have internal predecessors, (1319), 0 states have call successors, (0), 0 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 21:18:58,123 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:58,123 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, 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 21:18:58,124 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:18:58,124 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:18:58,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:58,124 INFO L85 PathProgramCache]: Analyzing trace with hash 733423321, now seen corresponding path program 1 times [2023-12-05 21:18:58,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:58,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021457616] [2023-12-05 21:18:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:58,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:58,167 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 21:18:58,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021457616] [2023-12-05 21:18:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021457616] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:58,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:58,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:18:58,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185096934] [2023-12-05 21:18:58,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:58,179 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:18:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:18:58,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:18:58,180 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 330 [2023-12-05 21:18:58,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 401 transitions, 2417 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 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 21:18:58,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:58,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 330 [2023-12-05 21:18:58,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:59,329 INFO L124 PetriNetUnfolderBase]: 2666/8920 cut-off events. [2023-12-05 21:18:59,329 INFO L125 PetriNetUnfolderBase]: For 21002/23542 co-relation queries the response was YES. [2023-12-05 21:18:59,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30039 conditions, 8920 events. 2666/8920 cut-off events. For 21002/23542 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 89791 event pairs, 2371 based on Foata normal form. 83/8588 useless extension candidates. Maximal degree in co-relation 29519. Up to 4736 conditions per place. [2023-12-05 21:18:59,386 INFO L140 encePairwiseOnDemand]: 326/330 looper letters, 171 selfloop transitions, 2 changer transitions 8/399 dead transitions. [2023-12-05 21:18:59,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 399 transitions, 2763 flow [2023-12-05 21:18:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:18:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:18:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2023-12-05 21:18:59,388 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7414141414141414 [2023-12-05 21:18:59,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2023-12-05 21:18:59,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2023-12-05 21:18:59,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:59,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2023-12-05 21:18:59,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 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 21:18:59,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 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 21:18:59,392 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 330.0) internal successors, (1320), 4 states have internal predecessors, (1320), 0 states have call successors, (0), 0 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 21:18:59,394 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, 11 predicate places. [2023-12-05 21:18:59,394 INFO L500 AbstractCegarLoop]: Abstraction has has 313 places, 399 transitions, 2763 flow [2023-12-05 21:18:59,395 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 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 21:18:59,395 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:59,395 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, 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 21:18:59,395 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:18:59,395 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:18:59,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:59,397 INFO L85 PathProgramCache]: Analyzing trace with hash 733423322, now seen corresponding path program 1 times [2023-12-05 21:18:59,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:59,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861494993] [2023-12-05 21:18:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:59,504 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 21:18:59,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:59,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861494993] [2023-12-05 21:18:59,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861494993] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:59,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:59,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:18:59,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927261537] [2023-12-05 21:18:59,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:59,510 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:18:59,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:18:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:18:59,512 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 330 [2023-12-05 21:18:59,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 399 transitions, 2763 flow. Second operand has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 21:18:59,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:59,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 330 [2023-12-05 21:18:59,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:00,751 INFO L124 PetriNetUnfolderBase]: 2864/9354 cut-off events. [2023-12-05 21:19:00,752 INFO L125 PetriNetUnfolderBase]: For 31242/33443 co-relation queries the response was YES. [2023-12-05 21:19:00,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35360 conditions, 9354 events. 2864/9354 cut-off events. For 31242/33443 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 91992 event pairs, 2447 based on Foata normal form. 1/8955 useless extension candidates. Maximal degree in co-relation 35132. Up to 4889 conditions per place. [2023-12-05 21:19:00,800 INFO L140 encePairwiseOnDemand]: 323/330 looper letters, 175 selfloop transitions, 6 changer transitions 8/411 dead transitions. [2023-12-05 21:19:00,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 411 transitions, 3221 flow [2023-12-05 21:19:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:19:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:19:00,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 905 transitions. [2023-12-05 21:19:00,802 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6856060606060606 [2023-12-05 21:19:00,802 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 905 transitions. [2023-12-05 21:19:00,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 905 transitions. [2023-12-05 21:19:00,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:00,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 905 transitions. [2023-12-05 21:19:00,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.25) internal successors, (905), 4 states have internal predecessors, (905), 0 states have call successors, (0), 0 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 21:19:00,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 21:19:00,806 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 330.0) internal successors, (1650), 5 states have internal predecessors, (1650), 0 states have call successors, (0), 0 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 21:19:00,806 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, 14 predicate places. [2023-12-05 21:19:00,807 INFO L500 AbstractCegarLoop]: Abstraction has has 316 places, 411 transitions, 3221 flow [2023-12-05 21:19:00,807 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 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 21:19:00,807 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:00,807 INFO L233 CegarLoopForPetriNet]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:00,807 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:19:00,807 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:19:00,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:00,808 INFO L85 PathProgramCache]: Analyzing trace with hash 279552724, now seen corresponding path program 1 times [2023-12-05 21:19:00,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:00,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931971922] [2023-12-05 21:19:00,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:00,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:00,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:00,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931971922] [2023-12-05 21:19:00,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931971922] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:19:00,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339322771] [2023-12-05 21:19:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:00,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:19:00,941 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:19:00,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:19:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:01,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-05 21:19:01,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:19:01,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:19:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:01,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:19:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:19:01,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339322771] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:19:01,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:19:01,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:19:01,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618104764] [2023-12-05 21:19:01,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:19:01,441 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-05 21:19:01,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:01,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-05 21:19:01,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:19:01,444 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 330 [2023-12-05 21:19:01,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 411 transitions, 3221 flow. Second operand has 11 states, 11 states have (on average 201.27272727272728) internal successors, (2214), 11 states have internal predecessors, (2214), 0 states have call successors, (0), 0 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 21:19:01,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:01,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 330 [2023-12-05 21:19:01,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:03,161 INFO L124 PetriNetUnfolderBase]: 2678/7847 cut-off events. [2023-12-05 21:19:03,162 INFO L125 PetriNetUnfolderBase]: For 38312/39713 co-relation queries the response was YES. [2023-12-05 21:19:03,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35958 conditions, 7847 events. 2678/7847 cut-off events. For 38312/39713 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 73939 event pairs, 583 based on Foata normal form. 36/7567 useless extension candidates. Maximal degree in co-relation 35678. Up to 4681 conditions per place. [2023-12-05 21:19:03,217 INFO L140 encePairwiseOnDemand]: 320/330 looper letters, 288 selfloop transitions, 14 changer transitions 3/515 dead transitions. [2023-12-05 21:19:03,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 515 transitions, 5107 flow [2023-12-05 21:19:03,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-05 21:19:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-12-05 21:19:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2634 transitions. [2023-12-05 21:19:03,223 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6651515151515152 [2023-12-05 21:19:03,223 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2634 transitions. [2023-12-05 21:19:03,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2634 transitions. [2023-12-05 21:19:03,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:03,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2634 transitions. [2023-12-05 21:19:03,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 219.5) internal successors, (2634), 12 states have internal predecessors, (2634), 0 states have call successors, (0), 0 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 21:19:03,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 330.0) internal successors, (4290), 13 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 21:19:03,233 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 330.0) internal successors, (4290), 13 states have internal predecessors, (4290), 0 states have call successors, (0), 0 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 21:19:03,233 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, 24 predicate places. [2023-12-05 21:19:03,234 INFO L500 AbstractCegarLoop]: Abstraction has has 326 places, 515 transitions, 5107 flow [2023-12-05 21:19:03,234 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 201.27272727272728) internal successors, (2214), 11 states have internal predecessors, (2214), 0 states have call successors, (0), 0 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 21:19:03,235 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:03,235 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:03,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-05 21:19:03,440 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:19:03,441 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:19:03,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:03,442 INFO L85 PathProgramCache]: Analyzing trace with hash 27209356, now seen corresponding path program 1 times [2023-12-05 21:19:03,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:03,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855181644] [2023-12-05 21:19:03,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:03,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:03,538 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 21:19:03,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:03,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855181644] [2023-12-05 21:19:03,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855181644] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:19:03,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:19:03,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:19:03,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616398081] [2023-12-05 21:19:03,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:19:03,539 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:19:03,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:03,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:19:03,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:19:03,542 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 330 [2023-12-05 21:19:03,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 515 transitions, 5107 flow. Second operand has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 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 21:19:03,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:03,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 330 [2023-12-05 21:19:03,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:05,040 INFO L124 PetriNetUnfolderBase]: 2580/8048 cut-off events. [2023-12-05 21:19:05,041 INFO L125 PetriNetUnfolderBase]: For 55673/56732 co-relation queries the response was YES. [2023-12-05 21:19:05,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38720 conditions, 8048 events. 2580/8048 cut-off events. For 55673/56732 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 74472 event pairs, 336 based on Foata normal form. 459/8240 useless extension candidates. Maximal degree in co-relation 38446. Up to 4232 conditions per place. [2023-12-05 21:19:05,097 INFO L140 encePairwiseOnDemand]: 308/330 looper letters, 438 selfloop transitions, 21 changer transitions 8/674 dead transitions. [2023-12-05 21:19:05,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 674 transitions, 8269 flow [2023-12-05 21:19:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:19:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:19:05,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1853 transitions. [2023-12-05 21:19:05,101 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7018939393939394 [2023-12-05 21:19:05,101 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1853 transitions. [2023-12-05 21:19:05,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1853 transitions. [2023-12-05 21:19:05,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:05,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1853 transitions. [2023-12-05 21:19:05,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 231.625) internal successors, (1853), 8 states have internal predecessors, (1853), 0 states have call successors, (0), 0 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 21:19:05,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 330.0) internal successors, (2970), 9 states have internal predecessors, (2970), 0 states have call successors, (0), 0 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 21:19:05,107 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 330.0) internal successors, (2970), 9 states have internal predecessors, (2970), 0 states have call successors, (0), 0 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 21:19:05,108 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, 31 predicate places. [2023-12-05 21:19:05,108 INFO L500 AbstractCegarLoop]: Abstraction has has 333 places, 674 transitions, 8269 flow [2023-12-05 21:19:05,108 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 197.66666666666666) internal successors, (1186), 6 states have internal predecessors, (1186), 0 states have call successors, (0), 0 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 21:19:05,108 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:05,108 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:05,108 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:19:05,109 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:19:05,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:05,109 INFO L85 PathProgramCache]: Analyzing trace with hash 27209357, now seen corresponding path program 1 times [2023-12-05 21:19:05,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:05,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206138719] [2023-12-05 21:19:05,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:05,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:05,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:05,305 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 21:19:05,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:05,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206138719] [2023-12-05 21:19:05,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206138719] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:19:05,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:19:05,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:19:05,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172198992] [2023-12-05 21:19:05,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:19:05,306 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:19:05,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:05,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:19:05,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:19:05,307 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 330 [2023-12-05 21:19:05,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 674 transitions, 8269 flow. Second operand has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:05,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:05,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 330 [2023-12-05 21:19:05,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:06,742 INFO L124 PetriNetUnfolderBase]: 2217/7506 cut-off events. [2023-12-05 21:19:06,743 INFO L125 PetriNetUnfolderBase]: For 62306/65542 co-relation queries the response was YES. [2023-12-05 21:19:06,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37060 conditions, 7506 events. 2217/7506 cut-off events. For 62306/65542 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 68305 event pairs, 1412 based on Foata normal form. 523/7724 useless extension candidates. Maximal degree in co-relation 36773. Up to 3502 conditions per place. [2023-12-05 21:19:06,803 INFO L140 encePairwiseOnDemand]: 316/330 looper letters, 398 selfloop transitions, 17 changer transitions 15/673 dead transitions. [2023-12-05 21:19:06,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 673 transitions, 9037 flow [2023-12-05 21:19:06,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:19:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:19:06,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1628 transitions. [2023-12-05 21:19:06,806 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7047619047619048 [2023-12-05 21:19:06,806 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1628 transitions. [2023-12-05 21:19:06,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1628 transitions. [2023-12-05 21:19:06,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:06,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1628 transitions. [2023-12-05 21:19:06,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 232.57142857142858) internal successors, (1628), 7 states have internal predecessors, (1628), 0 states have call successors, (0), 0 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 21:19:06,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 330.0) internal successors, (2640), 8 states have internal predecessors, (2640), 0 states have call successors, (0), 0 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 21:19:06,812 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 330.0) internal successors, (2640), 8 states have internal predecessors, (2640), 0 states have call successors, (0), 0 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 21:19:06,812 INFO L308 CegarLoopForPetriNet]: 302 programPoint places, 30 predicate places. [2023-12-05 21:19:06,813 INFO L500 AbstractCegarLoop]: Abstraction has has 332 places, 673 transitions, 9037 flow [2023-12-05 21:19:06,813 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 199.5) internal successors, (1197), 6 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:06,813 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:06,813 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:06,813 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:19:06,813 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 76 more)] === [2023-12-05 21:19:06,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash 76200770, now seen corresponding path program 1 times [2023-12-05 21:19:06,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:06,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324188592] [2023-12-05 21:19:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:06,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:19:06,831 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:19:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:19:06,856 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:19:06,857 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:19:06,857 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (78 of 79 remaining) [2023-12-05 21:19:06,859 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 79 remaining) [2023-12-05 21:19:06,859 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 79 remaining) [2023-12-05 21:19:06,859 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 79 remaining) [2023-12-05 21:19:06,859 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 79 remaining) [2023-12-05 21:19:06,859 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 79 remaining) [2023-12-05 21:19:06,859 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 79 remaining) [2023-12-05 21:19:06,860 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 79 remaining) [2023-12-05 21:19:06,861 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 79 remaining) [2023-12-05 21:19:06,862 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 79 remaining) [2023-12-05 21:19:06,863 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 79 remaining) [2023-12-05 21:19:06,864 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 79 remaining) [2023-12-05 21:19:06,865 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 79 remaining) [2023-12-05 21:19:06,866 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 79 remaining) [2023-12-05 21:19:06,866 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 79 remaining) [2023-12-05 21:19:06,866 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 79 remaining) [2023-12-05 21:19:06,866 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 79 remaining) [2023-12-05 21:19:06,866 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 79 remaining) [2023-12-05 21:19:06,866 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:19:06,867 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:06,868 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:19:06,868 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:19:06,913 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:19:06,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 404 places, 444 transitions, 904 flow [2023-12-05 21:19:07,007 INFO L124 PetriNetUnfolderBase]: 81/772 cut-off events. [2023-12-05 21:19:07,008 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-12-05 21:19:07,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 772 events. 81/772 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3766 event pairs, 0 based on Foata normal form. 0/547 useless extension candidates. Maximal degree in co-relation 482. Up to 12 conditions per place. [2023-12-05 21:19:07,019 INFO L82 GeneralOperation]: Start removeDead. Operand has 404 places, 444 transitions, 904 flow [2023-12-05 21:19:07,028 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 444 transitions, 904 flow [2023-12-05 21:19:07,029 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:19:07,029 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;@4c4d28b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:19:07,029 INFO L363 AbstractCegarLoop]: Starting to check reachability of 99 error locations. [2023-12-05 21:19:07,031 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:19:07,031 INFO L124 PetriNetUnfolderBase]: 0/35 cut-off events. [2023-12-05 21:19:07,031 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:19:07,032 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:07,032 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:07,032 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2023-12-05 21:19:07,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:07,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1154268803, now seen corresponding path program 1 times [2023-12-05 21:19:07,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:07,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400711312] [2023-12-05 21:19:07,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:07,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:07,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:07,094 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 21:19:07,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:07,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400711312] [2023-12-05 21:19:07,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400711312] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:19:07,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:19:07,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:19:07,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443779948] [2023-12-05 21:19:07,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:19:07,095 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:19:07,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:07,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:19:07,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:19:07,097 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 444 [2023-12-05 21:19:07,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 444 transitions, 904 flow. Second operand has 5 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 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 21:19:07,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:07,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 444 [2023-12-05 21:19:07,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:19:36,058 INFO L124 PetriNetUnfolderBase]: 95486/247002 cut-off events. [2023-12-05 21:19:36,058 INFO L125 PetriNetUnfolderBase]: For 305/305 co-relation queries the response was YES. [2023-12-05 21:19:36,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390249 conditions, 247002 events. 95486/247002 cut-off events. For 305/305 co-relation queries the response was YES. Maximal size of possible extension queue 4475. Compared 3601804 event pairs, 91232 based on Foata normal form. 37547/231227 useless extension candidates. Maximal degree in co-relation 346192. Up to 139714 conditions per place. [2023-12-05 21:19:38,465 INFO L140 encePairwiseOnDemand]: 399/444 looper letters, 191 selfloop transitions, 3 changer transitions 0/457 dead transitions. [2023-12-05 21:19:38,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 457 transitions, 1318 flow [2023-12-05 21:19:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:19:38,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:19:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1336 transitions. [2023-12-05 21:19:38,470 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7522522522522522 [2023-12-05 21:19:38,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1336 transitions. [2023-12-05 21:19:38,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1336 transitions. [2023-12-05 21:19:38,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:19:38,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1336 transitions. [2023-12-05 21:19:38,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 334.0) internal successors, (1336), 4 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:19:38,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 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 21:19:38,491 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 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 21:19:38,492 INFO L308 CegarLoopForPetriNet]: 404 programPoint places, -9 predicate places. [2023-12-05 21:19:38,492 INFO L500 AbstractCegarLoop]: Abstraction has has 395 places, 457 transitions, 1318 flow [2023-12-05 21:19:38,493 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 271.2) internal successors, (1356), 5 states have internal predecessors, (1356), 0 states have call successors, (0), 0 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 21:19:38,493 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:19:38,493 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:19:38,493 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:19:38,493 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 96 more)] === [2023-12-05 21:19:38,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:19:38,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1154268804, now seen corresponding path program 1 times [2023-12-05 21:19:38,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:19:38,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068810372] [2023-12-05 21:19:38,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:19:38,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:19:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:19:38,632 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 21:19:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:19:38,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068810372] [2023-12-05 21:19:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068810372] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:19:38,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:19:38,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:19:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396932144] [2023-12-05 21:19:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:19:38,633 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:19:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:19:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:19:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:19:38,635 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 444 [2023-12-05 21:19:38,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 457 transitions, 1318 flow. Second operand has 5 states, 5 states have (on average 235.2) internal successors, (1176), 5 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 21:19:38,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:19:38,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 444 [2023-12-05 21:19:38,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand