/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/weaver/popl20-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:20:42,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:20:43,019 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 21:20:43,036 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:20:43,037 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:20:43,037 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:20:43,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:20:43,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:20:43,038 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:20:43,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:20:43,038 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:20:43,038 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:20:43,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:20:43,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:20:43,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:20:43,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:20:43,039 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:20:43,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:20:43,040 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:20:43,040 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:20:43,040 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:20:43,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:20:43,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:20:43,041 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:20:43,041 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:20:43,041 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:20:43,041 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:20:43,042 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:20:43,042 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:20:43,042 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:20:43,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:20:43,042 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:20:43,042 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:20:43,042 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:20:43,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:20:43,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:20:43,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:20:43,266 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:20:43,267 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:20:43,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-12-05 21:20:44,211 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:20:44,345 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:20:44,346 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-12-05 21:20:44,351 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97910b7e4/e1c5e669baca43e1b5ea9deefcb46d5d/FLAG2f68d8244 [2023-12-05 21:20:44,360 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97910b7e4/e1c5e669baca43e1b5ea9deefcb46d5d [2023-12-05 21:20:44,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:20:44,363 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:20:44,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:20:44,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:20:44,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:20:44,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad4656d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44, skipping insertion in model container [2023-12-05 21:20:44,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,384 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:20:44,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:20:44,502 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:20:44,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:20:44,523 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:20:44,524 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:20:44,529 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:20:44,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44 WrapperNode [2023-12-05 21:20:44,529 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:20:44,530 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:20:44,530 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:20:44,530 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:20:44,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,540 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,551 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2023-12-05 21:20:44,552 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:20:44,552 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:20:44,552 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:20:44,552 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:20:44,557 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,559 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,562 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,564 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,565 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,567 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:20:44,568 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:20:44,568 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:20:44,568 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:20:44,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (1/1) ... [2023-12-05 21:20:44,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:20:44,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:20:44,591 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 21:20:44,605 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 21:20:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:20:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-05 21:20:44,624 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-05 21:20:44,624 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-05 21:20:44,625 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-05 21:20:44,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:20:44,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:20:44,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:20:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:20:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:20:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:20:44,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:20:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:20:44,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:20:44,627 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 21:20:44,687 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:20:44,688 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:20:44,827 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:20:44,853 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:20:44,853 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-05 21:20:44,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:20:44 BoogieIcfgContainer [2023-12-05 21:20:44,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:20:44,856 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:20:44,856 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:20:44,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:20:44,858 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:20:44" (1/3) ... [2023-12-05 21:20:44,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70988079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:20:44, skipping insertion in model container [2023-12-05 21:20:44,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:20:44" (2/3) ... [2023-12-05 21:20:44,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70988079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:20:44, skipping insertion in model container [2023-12-05 21:20:44,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:20:44" (3/3) ... [2023-12-05 21:20:44,860 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-12-05 21:20:44,871 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:20:44,871 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-12-05 21:20:44,871 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:20:44,939 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:20:44,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 190 flow [2023-12-05 21:20:44,993 INFO L124 PetriNetUnfolderBase]: 5/86 cut-off events. [2023-12-05 21:20:44,993 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:20:44,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-12-05 21:20:44,997 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 88 transitions, 190 flow [2023-12-05 21:20:45,000 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 64 transitions, 137 flow [2023-12-05 21:20:45,006 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:20:45,012 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;@62643d71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:20:45,012 INFO L363 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-12-05 21:20:45,017 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:20:45,018 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-12-05 21:20:45,018 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:20:45,018 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:20:45,018 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:20:45,019 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-12-05 21:20:45,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:20:45,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1955838696, now seen corresponding path program 1 times [2023-12-05 21:20:45,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:20:45,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757877071] [2023-12-05 21:20:45,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:20:45,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:20:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:20:45,243 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 21:20:45,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:20:45,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757877071] [2023-12-05 21:20:45,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757877071] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:20:45,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:20:45,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:20:45,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051154491] [2023-12-05 21:20:45,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:20:45,251 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:20:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:20:45,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:20:45,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:20:45,272 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 88 [2023-12-05 21:20:45,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 21:20:45,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:20:45,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 88 [2023-12-05 21:20:45,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:20:45,329 INFO L124 PetriNetUnfolderBase]: 28/128 cut-off events. [2023-12-05 21:20:45,329 INFO L125 PetriNetUnfolderBase]: For 11/15 co-relation queries the response was YES. [2023-12-05 21:20:45,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 128 events. 28/128 cut-off events. For 11/15 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 388 event pairs, 15 based on Foata normal form. 25/137 useless extension candidates. Maximal degree in co-relation 133. Up to 53 conditions per place. [2023-12-05 21:20:45,331 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 18 selfloop transitions, 1 changer transitions 0/60 dead transitions. [2023-12-05 21:20:45,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 167 flow [2023-12-05 21:20:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:20:45,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:20:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-12-05 21:20:45,340 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7462121212121212 [2023-12-05 21:20:45,340 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-12-05 21:20:45,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-12-05 21:20:45,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:20:45,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-12-05 21:20:45,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 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 21:20:45,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 21:20:45,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 21:20:45,350 INFO L308 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2023-12-05 21:20:45,350 INFO L500 AbstractCegarLoop]: Abstraction has has 67 places, 60 transitions, 167 flow [2023-12-05 21:20:45,350 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 21:20:45,350 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:20:45,351 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:20:45,351 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:20:45,351 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-12-05 21:20:45,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:20:45,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1955838695, now seen corresponding path program 1 times [2023-12-05 21:20:45,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:20:45,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075422457] [2023-12-05 21:20:45,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:20:45,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:20:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:20:45,567 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 21:20:45,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:20:45,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075422457] [2023-12-05 21:20:45,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075422457] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:20:45,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:20:45,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:20:45,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081541998] [2023-12-05 21:20:45,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:20:45,569 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:20:45,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:20:45,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:20:45,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:20:45,571 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 88 [2023-12-05 21:20:45,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 60 transitions, 167 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 21:20:45,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:20:45,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 88 [2023-12-05 21:20:45,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:20:45,648 INFO L124 PetriNetUnfolderBase]: 25/129 cut-off events. [2023-12-05 21:20:45,648 INFO L125 PetriNetUnfolderBase]: For 38/57 co-relation queries the response was YES. [2023-12-05 21:20:45,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 129 events. 25/129 cut-off events. For 38/57 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 414 event pairs, 13 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 157. Up to 49 conditions per place. [2023-12-05 21:20:45,650 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 18 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-12-05 21:20:45,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 197 flow [2023-12-05 21:20:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:20:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:20:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-12-05 21:20:45,652 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7159090909090909 [2023-12-05 21:20:45,652 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-12-05 21:20:45,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-12-05 21:20:45,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:20:45,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-12-05 21:20:45,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 21:20:45,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 21:20:45,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 21:20:45,655 INFO L308 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2023-12-05 21:20:45,655 INFO L500 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 197 flow [2023-12-05 21:20:45,656 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 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 21:20:45,656 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:20:45,656 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] [2023-12-05 21:20:45,656 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:20:45,656 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-12-05 21:20:45,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:20:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash -828205791, now seen corresponding path program 1 times [2023-12-05 21:20:45,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:20:45,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568513902] [2023-12-05 21:20:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:20:45,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:20:45,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:20:45,749 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 21:20:45,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:20:45,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568513902] [2023-12-05 21:20:45,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568513902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:20:45,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:20:45,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:20:45,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619666369] [2023-12-05 21:20:45,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:20:45,750 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:20:45,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:20:45,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:20:45,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:20:45,752 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 88 [2023-12-05 21:20:45,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 21:20:45,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:20:45,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 88 [2023-12-05 21:20:45,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:20:45,809 INFO L124 PetriNetUnfolderBase]: 22/114 cut-off events. [2023-12-05 21:20:45,809 INFO L125 PetriNetUnfolderBase]: For 84/121 co-relation queries the response was YES. [2023-12-05 21:20:45,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 114 events. 22/114 cut-off events. For 84/121 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 332 event pairs, 11 based on Foata normal form. 3/106 useless extension candidates. Maximal degree in co-relation 166. Up to 42 conditions per place. [2023-12-05 21:20:45,814 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 15 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-12-05 21:20:45,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 221 flow [2023-12-05 21:20:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:20:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:20:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-12-05 21:20:45,818 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-12-05 21:20:45,818 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-12-05 21:20:45,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-12-05 21:20:45,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:20:45,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-12-05 21:20:45,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 0 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 21:20:45,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 21:20:45,822 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 21:20:45,824 INFO L308 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2023-12-05 21:20:45,824 INFO L500 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 221 flow [2023-12-05 21:20:45,824 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 21:20:45,824 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:20:45,824 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] [2023-12-05 21:20:45,824 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:20:45,825 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-12-05 21:20:45,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:20:45,826 INFO L85 PathProgramCache]: Analyzing trace with hash -828205792, now seen corresponding path program 1 times [2023-12-05 21:20:45,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:20:45,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792902487] [2023-12-05 21:20:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:20:45,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:20:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:20:45,893 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 21:20:45,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:20:45,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792902487] [2023-12-05 21:20:45,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792902487] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:20:45,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:20:45,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:20:45,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861493340] [2023-12-05 21:20:45,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:20:45,895 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:20:45,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:20:45,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:20:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:20:45,899 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 88 [2023-12-05 21:20:45,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 221 flow. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 21:20:45,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:20:45,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 88 [2023-12-05 21:20:45,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:20:45,933 INFO L124 PetriNetUnfolderBase]: 19/99 cut-off events. [2023-12-05 21:20:45,933 INFO L125 PetriNetUnfolderBase]: For 139/190 co-relation queries the response was YES. [2023-12-05 21:20:45,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 99 events. 19/99 cut-off events. For 139/190 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 244 event pairs, 9 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 165. Up to 35 conditions per place. [2023-12-05 21:20:45,934 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-12-05 21:20:45,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 54 transitions, 235 flow [2023-12-05 21:20:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:20:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:20:45,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 191 transitions. [2023-12-05 21:20:45,936 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7234848484848485 [2023-12-05 21:20:45,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 191 transitions. [2023-12-05 21:20:45,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 191 transitions. [2023-12-05 21:20:45,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:20:45,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 191 transitions. [2023-12-05 21:20:45,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 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 21:20:45,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 21:20:45,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 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 21:20:45,940 INFO L308 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2023-12-05 21:20:45,941 INFO L500 AbstractCegarLoop]: Abstraction has has 67 places, 54 transitions, 235 flow [2023-12-05 21:20:45,941 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 21:20:45,949 INFO L161 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/popl20-figure1.wvr.c_BEv2_AllErrorsAtOnce [2023-12-05 21:20:45,973 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-12-05 21:20:45,973 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-12-05 21:20:45,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-12-05 21:20:45,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-12-05 21:20:45,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-12-05 21:20:45,974 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-12-05 21:20:45,975 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2023-12-05 21:20:45,976 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-12-05 21:20:45,976 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-12-05 21:20:45,976 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-12-05 21:20:45,976 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:20:45,976 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-05 21:20:45,980 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-05 21:20:45,980 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-12-05 21:20:45,990 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:20:45 BasicIcfg [2023-12-05 21:20:45,990 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-05 21:20:45,991 INFO L158 Benchmark]: Toolchain (without parser) took 1627.85ms. Allocated memory was 200.3MB in the beginning and 314.6MB in the end (delta: 114.3MB). Free memory was 148.4MB in the beginning and 184.9MB in the end (delta: -36.5MB). Peak memory consumption was 78.6MB. Max. memory is 8.0GB. [2023-12-05 21:20:45,991 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory is still 154.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-05 21:20:45,991 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.71ms. Allocated memory is still 200.3MB. Free memory was 148.1MB in the beginning and 137.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-05 21:20:45,991 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.81ms. Allocated memory is still 200.3MB. Free memory was 137.2MB in the beginning and 135.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:20:45,993 INFO L158 Benchmark]: Boogie Preprocessor took 14.74ms. Allocated memory is still 200.3MB. Free memory was 135.8MB in the beginning and 134.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-05 21:20:45,995 INFO L158 Benchmark]: RCFGBuilder took 287.00ms. Allocated memory is still 200.3MB. Free memory was 134.4MB in the beginning and 119.0MB in the end (delta: 15.4MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-05 21:20:45,995 INFO L158 Benchmark]: TraceAbstraction took 1134.23ms. Allocated memory was 200.3MB in the beginning and 314.6MB in the end (delta: 114.3MB). Free memory was 118.3MB in the beginning and 184.9MB in the end (delta: -66.6MB). Peak memory consumption was 49.3MB. Max. memory is 8.0GB. [2023-12-05 21:20:45,997 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 200.3MB. Free memory is still 154.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 165.71ms. Allocated memory is still 200.3MB. Free memory was 148.1MB in the beginning and 137.2MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.81ms. Allocated memory is still 200.3MB. Free memory was 137.2MB in the beginning and 135.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 14.74ms. Allocated memory is still 200.3MB. Free memory was 135.8MB in the beginning and 134.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 287.00ms. Allocated memory is still 200.3MB. Free memory was 134.4MB in the beginning and 119.0MB in the end (delta: 15.4MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 1134.23ms. Allocated memory was 200.3MB in the beginning and 314.6MB in the end (delta: 114.3MB). Free memory was 118.3MB in the beginning and 184.9MB in the end (delta: -66.6MB). Peak memory consumption was 49.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 108 locations, 10 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.0s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 42 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 42 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 68 IncrementalHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 21 mSDtfsCounter, 68 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=235occurred in iteration=4, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 341 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-05 21:20:46,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...