/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:02:44,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:02:44,260 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 21:02:44,291 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:02:44,291 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:02:44,292 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:02:44,292 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:02:44,292 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:02:44,293 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:02:44,293 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:02:44,293 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:02:44,293 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:02:44,293 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:02:44,294 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:02:44,294 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:02:44,294 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:02:44,294 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:02:44,295 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:02:44,295 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:02:44,295 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:02:44,295 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:02:44,299 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:02:44,300 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:02:44,300 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:02:44,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:02:44,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:02:44,304 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:02:44,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:02:44,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:02:44,306 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:02:44,306 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:02:44,306 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:02:44,307 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:02:44,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:02:44,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:02:44,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:02:44,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:02:44,530 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:02:44,531 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:02:44,532 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/25_stack_longer-2.i [2023-12-05 21:02:45,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:02:45,681 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:02:45,682 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/25_stack_longer-2.i [2023-12-05 21:02:45,695 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05cf8a0b8/0f63d55a011b4228aa1f5e012846a14c/FLAGac89b4172 [2023-12-05 21:02:46,061 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05cf8a0b8/0f63d55a011b4228aa1f5e012846a14c [2023-12-05 21:02:46,063 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:02:46,064 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:02:46,067 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:02:46,067 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:02:46,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:02:46,078 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2443cc57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46, skipping insertion in model container [2023-12-05 21:02:46,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,126 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:02:46,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:02:46,550 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:02:46,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:02:46,600 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:02:46,601 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:02:46,606 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:02:46,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46 WrapperNode [2023-12-05 21:02:46,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:02:46,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:02:46,607 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:02:46,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:02:46,613 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,623 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,640 INFO L138 Inliner]: procedures = 179, calls = 37, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 179 [2023-12-05 21:02:46,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:02:46,641 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:02:46,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:02:46,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:02:46,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,657 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,658 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,659 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:02:46,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:02:46,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:02:46,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:02:46,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (1/1) ... [2023-12-05 21:02:46,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:02:46,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:02:46,721 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 21:02:46,735 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 21:02:46,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:02:46,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:02:46,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:02:46,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:02:46,751 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 21:02:46,836 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:02:46,838 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:02:47,177 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:02:47,353 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:02:47,353 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-05 21:02:47,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:02:47 BoogieIcfgContainer [2023-12-05 21:02:47,354 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:02:47,357 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:02:47,357 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:02:47,360 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:02:47,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:02:46" (1/3) ... [2023-12-05 21:02:47,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d83d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:02:47, skipping insertion in model container [2023-12-05 21:02:47,361 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:02:46" (2/3) ... [2023-12-05 21:02:47,361 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54d83d46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:02:47, skipping insertion in model container [2023-12-05 21:02:47,362 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:02:47" (3/3) ... [2023-12-05 21:02:47,363 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longer-2.i [2023-12-05 21:02:47,375 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:02:47,376 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2023-12-05 21:02:47,376 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:02:47,443 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:47,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 132 transitions, 268 flow [2023-12-05 21:02:47,536 INFO L124 PetriNetUnfolderBase]: 8/145 cut-off events. [2023-12-05 21:02:47,536 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:47,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 145 events. 8/145 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 252 event pairs, 0 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2023-12-05 21:02:47,542 INFO L82 GeneralOperation]: Start removeDead. Operand has 128 places, 132 transitions, 268 flow [2023-12-05 21:02:47,548 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 132 transitions, 268 flow [2023-12-05 21:02:47,560 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:47,567 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;@9c5102c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:47,567 INFO L363 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2023-12-05 21:02:47,574 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:47,575 INFO L124 PetriNetUnfolderBase]: 1/27 cut-off events. [2023-12-05 21:02:47,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:47,575 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:47,575 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:47,576 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:02:47,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1813666574, now seen corresponding path program 1 times [2023-12-05 21:02:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:47,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038800418] [2023-12-05 21:02:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:47,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:47,830 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 21:02:47,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:47,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038800418] [2023-12-05 21:02:47,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038800418] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:47,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:47,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:47,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211788701] [2023-12-05 21:02:47,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:47,840 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:47,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:47,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:47,877 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 132 [2023-12-05 21:02:47,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 132 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:47,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:47,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 132 [2023-12-05 21:02:47,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:48,025 INFO L124 PetriNetUnfolderBase]: 52/308 cut-off events. [2023-12-05 21:02:48,025 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:48,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 308 events. 52/308 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1347 event pairs, 40 based on Foata normal form. 22/245 useless extension candidates. Maximal degree in co-relation 390. Up to 112 conditions per place. [2023-12-05 21:02:48,029 INFO L140 encePairwiseOnDemand]: 112/132 looper letters, 31 selfloop transitions, 1 changer transitions 0/107 dead transitions. [2023-12-05 21:02:48,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 107 transitions, 282 flow [2023-12-05 21:02:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:48,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-12-05 21:02:48,046 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7196969696969697 [2023-12-05 21:02:48,047 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-12-05 21:02:48,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-12-05 21:02:48,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:48,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-12-05 21:02:48,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,063 INFO L308 CegarLoopForPetriNet]: 128 programPoint places, -20 predicate places. [2023-12-05 21:02:48,063 INFO L500 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 282 flow [2023-12-05 21:02:48,064 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,064 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:48,064 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:48,064 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:02:48,065 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:02:48,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:48,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1813666575, now seen corresponding path program 1 times [2023-12-05 21:02:48,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:48,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861725458] [2023-12-05 21:02:48,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:48,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:48,289 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 21:02:48,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:48,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861725458] [2023-12-05 21:02:48,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861725458] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:48,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:48,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:48,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472310050] [2023-12-05 21:02:48,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:48,291 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:48,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:48,293 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 132 [2023-12-05 21:02:48,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 107 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:48,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 132 [2023-12-05 21:02:48,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:48,360 INFO L124 PetriNetUnfolderBase]: 28/208 cut-off events. [2023-12-05 21:02:48,360 INFO L125 PetriNetUnfolderBase]: For 25/37 co-relation queries the response was YES. [2023-12-05 21:02:48,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 208 events. 28/208 cut-off events. For 25/37 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 663 event pairs, 20 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 313. Up to 68 conditions per place. [2023-12-05 21:02:48,364 INFO L140 encePairwiseOnDemand]: 130/132 looper letters, 29 selfloop transitions, 1 changer transitions 0/106 dead transitions. [2023-12-05 21:02:48,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 106 transitions, 338 flow [2023-12-05 21:02:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 268 transitions. [2023-12-05 21:02:48,366 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6767676767676768 [2023-12-05 21:02:48,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 268 transitions. [2023-12-05 21:02:48,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 268 transitions. [2023-12-05 21:02:48,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:48,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 268 transitions. [2023-12-05 21:02:48,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,370 INFO L308 CegarLoopForPetriNet]: 128 programPoint places, -19 predicate places. [2023-12-05 21:02:48,370 INFO L500 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 338 flow [2023-12-05 21:02:48,370 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,370 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:48,370 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:48,371 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:02:48,371 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:02:48,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:48,371 INFO L85 PathProgramCache]: Analyzing trace with hash 253041161, now seen corresponding path program 1 times [2023-12-05 21:02:48,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:48,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937135793] [2023-12-05 21:02:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:48,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:48,537 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 21:02:48,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937135793] [2023-12-05 21:02:48,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937135793] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:48,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:48,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:02:48,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807537755] [2023-12-05 21:02:48,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:48,538 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:02:48,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:48,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:02:48,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:02:48,540 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 132 [2023-12-05 21:02:48,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 338 flow. Second operand has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:48,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 132 [2023-12-05 21:02:48,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:48,602 INFO L124 PetriNetUnfolderBase]: 26/202 cut-off events. [2023-12-05 21:02:48,602 INFO L125 PetriNetUnfolderBase]: For 72/84 co-relation queries the response was YES. [2023-12-05 21:02:48,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 202 events. 26/202 cut-off events. For 72/84 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 629 event pairs, 18 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 354. Up to 65 conditions per place. [2023-12-05 21:02:48,603 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 29 selfloop transitions, 2 changer transitions 0/104 dead transitions. [2023-12-05 21:02:48,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 104 transitions, 388 flow [2023-12-05 21:02:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:02:48,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:02:48,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2023-12-05 21:02:48,605 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6382575757575758 [2023-12-05 21:02:48,605 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 337 transitions. [2023-12-05 21:02:48,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 337 transitions. [2023-12-05 21:02:48,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:48,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 337 transitions. [2023-12-05 21:02:48,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 84.25) internal successors, (337), 4 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,607 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,608 INFO L308 CegarLoopForPetriNet]: 128 programPoint places, -18 predicate places. [2023-12-05 21:02:48,608 INFO L500 AbstractCegarLoop]: Abstraction has has 110 places, 104 transitions, 388 flow [2023-12-05 21:02:48,608 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 78.0) internal successors, (468), 6 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,608 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:48,609 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:48,609 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:02:48,609 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:02:48,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:48,609 INFO L85 PathProgramCache]: Analyzing trace with hash 253041162, now seen corresponding path program 1 times [2023-12-05 21:02:48,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:48,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988797392] [2023-12-05 21:02:48,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:48,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:48,742 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 21:02:48,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:48,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988797392] [2023-12-05 21:02:48,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988797392] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:48,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:48,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:02:48,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414318379] [2023-12-05 21:02:48,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:48,746 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:02:48,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:48,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:02:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:02:48,748 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 132 [2023-12-05 21:02:48,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 104 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:48,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 132 [2023-12-05 21:02:48,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:48,796 INFO L124 PetriNetUnfolderBase]: 24/196 cut-off events. [2023-12-05 21:02:48,796 INFO L125 PetriNetUnfolderBase]: For 135/141 co-relation queries the response was YES. [2023-12-05 21:02:48,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 453 conditions, 196 events. 24/196 cut-off events. For 135/141 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 588 event pairs, 16 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 383. Up to 59 conditions per place. [2023-12-05 21:02:48,798 INFO L140 encePairwiseOnDemand]: 128/132 looper letters, 25 selfloop transitions, 2 changer transitions 0/102 dead transitions. [2023-12-05 21:02:48,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 426 flow [2023-12-05 21:02:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:02:48,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:02:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 357 transitions. [2023-12-05 21:02:48,799 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6761363636363636 [2023-12-05 21:02:48,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 357 transitions. [2023-12-05 21:02:48,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 357 transitions. [2023-12-05 21:02:48,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:48,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 357 transitions. [2023-12-05 21:02:48,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.25) internal successors, (357), 4 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,801 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 132.0) internal successors, (660), 5 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,803 INFO L308 CegarLoopForPetriNet]: 128 programPoint places, -17 predicate places. [2023-12-05 21:02:48,804 INFO L500 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 426 flow [2023-12-05 21:02:48,804 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 84.0) internal successors, (420), 5 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:48,804 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:48,805 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:48,805 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:02:48,805 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-12-05 21:02:48,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1350829373, now seen corresponding path program 1 times [2023-12-05 21:02:48,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:48,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359761708] [2023-12-05 21:02:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:48,817 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:48,842 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:48,842 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:48,843 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (62 of 63 remaining) [2023-12-05 21:02:48,844 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 63 remaining) [2023-12-05 21:02:48,844 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 63 remaining) [2023-12-05 21:02:48,845 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 63 remaining) [2023-12-05 21:02:48,846 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 63 remaining) [2023-12-05 21:02:48,847 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 63 remaining) [2023-12-05 21:02:48,847 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 63 remaining) [2023-12-05 21:02:48,850 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 63 remaining) [2023-12-05 21:02:48,850 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 63 remaining) [2023-12-05 21:02:48,850 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (36 of 63 remaining) [2023-12-05 21:02:48,850 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 63 remaining) [2023-12-05 21:02:48,850 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 63 remaining) [2023-12-05 21:02:48,850 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 63 remaining) [2023-12-05 21:02:48,851 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 63 remaining) [2023-12-05 21:02:48,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 63 remaining) [2023-12-05 21:02:48,854 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 63 remaining) [2023-12-05 21:02:48,854 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 63 remaining) [2023-12-05 21:02:48,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 63 remaining) [2023-12-05 21:02:48,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 63 remaining) [2023-12-05 21:02:48,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 63 remaining) [2023-12-05 21:02:48,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 63 remaining) [2023-12-05 21:02:48,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 63 remaining) [2023-12-05 21:02:48,855 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 63 remaining) [2023-12-05 21:02:48,857 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 63 remaining) [2023-12-05 21:02:48,857 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 63 remaining) [2023-12-05 21:02:48,857 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 63 remaining) [2023-12-05 21:02:48,857 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 63 remaining) [2023-12-05 21:02:48,857 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (9 of 63 remaining) [2023-12-05 21:02:48,857 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 63 remaining) [2023-12-05 21:02:48,857 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 63 remaining) [2023-12-05 21:02:48,858 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 63 remaining) [2023-12-05 21:02:48,858 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 63 remaining) [2023-12-05 21:02:48,858 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (4 of 63 remaining) [2023-12-05 21:02:48,858 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 63 remaining) [2023-12-05 21:02:48,858 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 63 remaining) [2023-12-05 21:02:48,858 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 63 remaining) [2023-12-05 21:02:48,858 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 63 remaining) [2023-12-05 21:02:48,858 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:02:48,859 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:02:48,861 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:48,861 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:02:48,943 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:48,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 229 transitions, 468 flow [2023-12-05 21:02:48,985 INFO L124 PetriNetUnfolderBase]: 15/257 cut-off events. [2023-12-05 21:02:48,985 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:02:48,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 257 events. 15/257 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 711 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 207. Up to 6 conditions per place. [2023-12-05 21:02:48,988 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 229 transitions, 468 flow [2023-12-05 21:02:48,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 229 transitions, 468 flow [2023-12-05 21:02:48,994 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:48,994 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;@9c5102c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:48,994 INFO L363 AbstractCegarLoop]: Starting to check reachability of 93 error locations. [2023-12-05 21:02:48,997 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:48,997 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-12-05 21:02:48,997 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:48,997 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:48,997 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:48,997 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:02:48,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:48,998 INFO L85 PathProgramCache]: Analyzing trace with hash 729519379, now seen corresponding path program 1 times [2023-12-05 21:02:48,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:48,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801901093] [2023-12-05 21:02:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:48,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:49,033 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 21:02:49,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:49,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801901093] [2023-12-05 21:02:49,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801901093] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:49,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:49,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:49,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936432243] [2023-12-05 21:02:49,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:49,034 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:49,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:49,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:49,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:49,037 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 229 [2023-12-05 21:02:49,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 229 transitions, 468 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:49,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:49,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 229 [2023-12-05 21:02:49,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:50,105 INFO L124 PetriNetUnfolderBase]: 3095/9409 cut-off events. [2023-12-05 21:02:50,105 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2023-12-05 21:02:50,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13958 conditions, 9409 events. 3095/9409 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 96603 event pairs, 2344 based on Foata normal form. 699/6760 useless extension candidates. Maximal degree in co-relation 2816. Up to 4474 conditions per place. [2023-12-05 21:02:50,169 INFO L140 encePairwiseOnDemand]: 193/229 looper letters, 54 selfloop transitions, 1 changer transitions 0/187 dead transitions. [2023-12-05 21:02:50,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 187 transitions, 494 flow [2023-12-05 21:02:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 498 transitions. [2023-12-05 21:02:50,171 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7248908296943232 [2023-12-05 21:02:50,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 498 transitions. [2023-12-05 21:02:50,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 498 transitions. [2023-12-05 21:02:50,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:50,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 498 transitions. [2023-12-05 21:02:50,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.0) internal successors, (498), 3 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,174 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,176 INFO L308 CegarLoopForPetriNet]: 221 programPoint places, -35 predicate places. [2023-12-05 21:02:50,176 INFO L500 AbstractCegarLoop]: Abstraction has has 186 places, 187 transitions, 494 flow [2023-12-05 21:02:50,176 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,177 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:50,177 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:50,177 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:02:50,178 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:02:50,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:50,178 INFO L85 PathProgramCache]: Analyzing trace with hash 729519380, now seen corresponding path program 1 times [2023-12-05 21:02:50,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:50,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874148196] [2023-12-05 21:02:50,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:50,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:50,231 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 21:02:50,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:50,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874148196] [2023-12-05 21:02:50,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874148196] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:50,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:50,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:50,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442242150] [2023-12-05 21:02:50,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:50,232 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:50,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:50,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:50,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:50,234 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 229 [2023-12-05 21:02:50,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 187 transitions, 494 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:50,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 229 [2023-12-05 21:02:50,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:50,856 INFO L124 PetriNetUnfolderBase]: 1899/6058 cut-off events. [2023-12-05 21:02:50,856 INFO L125 PetriNetUnfolderBase]: For 657/1749 co-relation queries the response was YES. [2023-12-05 21:02:50,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11773 conditions, 6058 events. 1899/6058 cut-off events. For 657/1749 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 58028 event pairs, 1402 based on Foata normal form. 0/4147 useless extension candidates. Maximal degree in co-relation 2297. Up to 2817 conditions per place. [2023-12-05 21:02:50,898 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 52 selfloop transitions, 1 changer transitions 0/186 dead transitions. [2023-12-05 21:02:50,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 186 transitions, 596 flow [2023-12-05 21:02:50,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:02:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:02:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-12-05 21:02:50,900 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6768558951965066 [2023-12-05 21:02:50,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-12-05 21:02:50,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-12-05 21:02:50,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:50,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-12-05 21:02:50,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,905 INFO L308 CegarLoopForPetriNet]: 221 programPoint places, -34 predicate places. [2023-12-05 21:02:50,905 INFO L500 AbstractCegarLoop]: Abstraction has has 187 places, 186 transitions, 596 flow [2023-12-05 21:02:50,905 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:50,905 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:50,906 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:50,906 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:02:50,906 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:02:50,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash 578343561, now seen corresponding path program 1 times [2023-12-05 21:02:50,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:50,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831856923] [2023-12-05 21:02:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:50,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:51,036 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 21:02:51,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:51,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831856923] [2023-12-05 21:02:51,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831856923] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:51,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:51,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:02:51,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387782237] [2023-12-05 21:02:51,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:51,037 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:02:51,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:02:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:02:51,039 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 229 [2023-12-05 21:02:51,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 186 transitions, 596 flow. Second operand has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:51,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:51,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 229 [2023-12-05 21:02:51,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:51,717 INFO L124 PetriNetUnfolderBase]: 1607/5328 cut-off events. [2023-12-05 21:02:51,717 INFO L125 PetriNetUnfolderBase]: For 1548/2676 co-relation queries the response was YES. [2023-12-05 21:02:51,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12495 conditions, 5328 events. 1607/5328 cut-off events. For 1548/2676 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 50410 event pairs, 1154 based on Foata normal form. 0/3784 useless extension candidates. Maximal degree in co-relation 2618. Up to 2364 conditions per place. [2023-12-05 21:02:51,753 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 50 selfloop transitions, 2 changer transitions 0/182 dead transitions. [2023-12-05 21:02:51,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 182 transitions, 676 flow [2023-12-05 21:02:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:02:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:02:51,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-12-05 21:02:51,755 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6462882096069869 [2023-12-05 21:02:51,755 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-12-05 21:02:51,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-12-05 21:02:51,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:51,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-12-05 21:02:51,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:51,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:51,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:51,760 INFO L308 CegarLoopForPetriNet]: 221 programPoint places, -35 predicate places. [2023-12-05 21:02:51,760 INFO L500 AbstractCegarLoop]: Abstraction has has 186 places, 182 transitions, 676 flow [2023-12-05 21:02:51,761 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:51,761 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:51,761 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:51,761 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:02:51,761 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:02:51,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:51,761 INFO L85 PathProgramCache]: Analyzing trace with hash 578343562, now seen corresponding path program 1 times [2023-12-05 21:02:51,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:51,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448911439] [2023-12-05 21:02:51,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:51,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:51,873 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 21:02:51,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:51,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448911439] [2023-12-05 21:02:51,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448911439] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:51,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:51,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-05 21:02:51,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478016243] [2023-12-05 21:02:51,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:51,874 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:02:51,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:51,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:02:51,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:02:51,875 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 229 [2023-12-05 21:02:51,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 182 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:51,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:51,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 229 [2023-12-05 21:02:51,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:52,354 INFO L124 PetriNetUnfolderBase]: 1339/4638 cut-off events. [2023-12-05 21:02:52,354 INFO L125 PetriNetUnfolderBase]: For 2536/3190 co-relation queries the response was YES. [2023-12-05 21:02:52,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12503 conditions, 4638 events. 1339/4638 cut-off events. For 2536/3190 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 43679 event pairs, 930 based on Foata normal form. 0/3425 useless extension candidates. Maximal degree in co-relation 2835. Up to 1948 conditions per place. [2023-12-05 21:02:52,382 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 44 selfloop transitions, 2 changer transitions 0/178 dead transitions. [2023-12-05 21:02:52,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 178 transitions, 736 flow [2023-12-05 21:02:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:02:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:02:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-12-05 21:02:52,384 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.665938864628821 [2023-12-05 21:02:52,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-12-05 21:02:52,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-12-05 21:02:52,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:52,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-12-05 21:02:52,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:52,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:52,386 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:52,387 INFO L308 CegarLoopForPetriNet]: 221 programPoint places, -36 predicate places. [2023-12-05 21:02:52,387 INFO L500 AbstractCegarLoop]: Abstraction has has 185 places, 178 transitions, 736 flow [2023-12-05 21:02:52,387 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:52,387 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:52,387 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:52,387 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:02:52,388 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 90 more)] === [2023-12-05 21:02:52,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash 748695334, now seen corresponding path program 1 times [2023-12-05 21:02:52,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:52,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820157446] [2023-12-05 21:02:52,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:52,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:52,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:02:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:02:52,403 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:02:52,403 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:02:52,403 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (92 of 93 remaining) [2023-12-05 21:02:52,403 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 93 remaining) [2023-12-05 21:02:52,403 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 93 remaining) [2023-12-05 21:02:52,403 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 93 remaining) [2023-12-05 21:02:52,403 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 93 remaining) [2023-12-05 21:02:52,404 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (71 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (66 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 93 remaining) [2023-12-05 21:02:52,405 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 93 remaining) [2023-12-05 21:02:52,406 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (39 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (34 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 93 remaining) [2023-12-05 21:02:52,407 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 93 remaining) [2023-12-05 21:02:52,408 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (9 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (4 of 93 remaining) [2023-12-05 21:02:52,409 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 93 remaining) [2023-12-05 21:02:52,410 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 93 remaining) [2023-12-05 21:02:52,410 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 93 remaining) [2023-12-05 21:02:52,410 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 93 remaining) [2023-12-05 21:02:52,410 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:02:52,410 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:02:52,410 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:02:52,410 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:02:52,469 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:02:52,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 314 places, 326 transitions, 670 flow [2023-12-05 21:02:52,514 INFO L124 PetriNetUnfolderBase]: 22/369 cut-off events. [2023-12-05 21:02:52,514 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:02:52,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382 conditions, 369 events. 22/369 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1305 event pairs, 0 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 303. Up to 8 conditions per place. [2023-12-05 21:02:52,521 INFO L82 GeneralOperation]: Start removeDead. Operand has 314 places, 326 transitions, 670 flow [2023-12-05 21:02:52,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 314 places, 326 transitions, 670 flow [2023-12-05 21:02:52,527 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:02:52,527 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;@9c5102c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:02:52,527 INFO L363 AbstractCegarLoop]: Starting to check reachability of 123 error locations. [2023-12-05 21:02:52,529 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:02:52,529 INFO L124 PetriNetUnfolderBase]: 1/28 cut-off events. [2023-12-05 21:02:52,529 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:02:52,529 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:52,529 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:52,529 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-12-05 21:02:52,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:52,529 INFO L85 PathProgramCache]: Analyzing trace with hash 574041625, now seen corresponding path program 1 times [2023-12-05 21:02:52,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:52,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283089140] [2023-12-05 21:02:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:52,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:02:52,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:52,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283089140] [2023-12-05 21:02:52,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283089140] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:52,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:02:52,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:02:52,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773261525] [2023-12-05 21:02:52,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:52,547 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:02:52,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:52,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:02:52,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:02:52,549 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 326 [2023-12-05 21:02:52,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 326 transitions, 670 flow. Second operand has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:52,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:52,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 326 [2023-12-05 21:02:52,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:27,340 INFO L124 PetriNetUnfolderBase]: 116210/285417 cut-off events. [2023-12-05 21:03:27,341 INFO L125 PetriNetUnfolderBase]: For 4357/4357 co-relation queries the response was YES. [2023-12-05 21:03:29,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435627 conditions, 285417 events. 116210/285417 cut-off events. For 4357/4357 co-relation queries the response was YES. Maximal size of possible extension queue 8011. Compared 4197247 event pairs, 87528 based on Foata normal form. 19167/196327 useless extension candidates. Maximal degree in co-relation 13952. Up to 148194 conditions per place. [2023-12-05 21:03:31,594 INFO L140 encePairwiseOnDemand]: 274/326 looper letters, 77 selfloop transitions, 1 changer transitions 0/267 dead transitions. [2023-12-05 21:03:31,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 267 transitions, 708 flow [2023-12-05 21:03:31,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:31,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:31,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 711 transitions. [2023-12-05 21:03:31,599 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7269938650306749 [2023-12-05 21:03:31,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 711 transitions. [2023-12-05 21:03:31,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 711 transitions. [2023-12-05 21:03:31,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:31,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 711 transitions. [2023-12-05 21:03:31,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:31,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:31,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:31,603 INFO L308 CegarLoopForPetriNet]: 314 programPoint places, -50 predicate places. [2023-12-05 21:03:31,603 INFO L500 AbstractCegarLoop]: Abstraction has has 264 places, 267 transitions, 708 flow [2023-12-05 21:03:31,603 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 196.66666666666666) internal successors, (590), 3 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:31,603 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:31,604 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:31,604 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:03:31,604 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-12-05 21:03:31,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:31,604 INFO L85 PathProgramCache]: Analyzing trace with hash 574041626, now seen corresponding path program 1 times [2023-12-05 21:03:31,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:31,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948514672] [2023-12-05 21:03:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:31,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:31,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:31,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948514672] [2023-12-05 21:03:31,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948514672] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:31,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:31,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:03:31,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963150945] [2023-12-05 21:03:31,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:31,634 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:03:31,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:03:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:03:31,635 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 326 [2023-12-05 21:03:31,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 267 transitions, 708 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:31,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:31,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 326 [2023-12-05 21:03:31,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:03:56,219 INFO L124 PetriNetUnfolderBase]: 73655/185094 cut-off events. [2023-12-05 21:03:56,220 INFO L125 PetriNetUnfolderBase]: For 19529/49971 co-relation queries the response was YES. [2023-12-05 21:03:57,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377010 conditions, 185094 events. 73655/185094 cut-off events. For 19529/49971 co-relation queries the response was YES. Maximal size of possible extension queue 5290. Compared 2625054 event pairs, 54620 based on Foata normal form. 0/120352 useless extension candidates. Maximal degree in co-relation 11760. Up to 94947 conditions per place. [2023-12-05 21:03:59,276 INFO L140 encePairwiseOnDemand]: 324/326 looper letters, 75 selfloop transitions, 1 changer transitions 0/266 dead transitions. [2023-12-05 21:03:59,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 266 transitions, 856 flow [2023-12-05 21:03:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:03:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:03:59,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 662 transitions. [2023-12-05 21:03:59,280 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6768916155419223 [2023-12-05 21:03:59,280 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 662 transitions. [2023-12-05 21:03:59,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 662 transitions. [2023-12-05 21:03:59,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:03:59,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 662 transitions. [2023-12-05 21:03:59,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:59,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:59,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 326.0) internal successors, (1304), 4 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:59,293 INFO L308 CegarLoopForPetriNet]: 314 programPoint places, -49 predicate places. [2023-12-05 21:03:59,293 INFO L500 AbstractCegarLoop]: Abstraction has has 265 places, 266 transitions, 856 flow [2023-12-05 21:03:59,293 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:59,293 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:03:59,293 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:03:59,294 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:03:59,294 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 120 more)] === [2023-12-05 21:03:59,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:03:59,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1284264791, now seen corresponding path program 1 times [2023-12-05 21:03:59,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:03:59,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27770419] [2023-12-05 21:03:59,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:03:59,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:03:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:03:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:03:59,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:03:59,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27770419] [2023-12-05 21:03:59,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27770419] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:03:59,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:03:59,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:03:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584680195] [2023-12-05 21:03:59,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:03:59,438 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:03:59,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:03:59,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:03:59,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:03:59,441 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 326 [2023-12-05 21:03:59,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 266 transitions, 856 flow. Second operand has 6 states, 6 states have (on average 194.0) internal successors, (1164), 6 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:03:59,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:03:59,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 326 [2023-12-05 21:03:59,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand