/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/fib_unsafe-5.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 20:58:10,573 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 20:58:10,641 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 20:58:10,665 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 20:58:10,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 20:58:10,666 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 20:58:10,666 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 20:58:10,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 20:58:10,667 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 20:58:10,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 20:58:10,670 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 20:58:10,671 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 20:58:10,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 20:58:10,672 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 20:58:10,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 20:58:10,672 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 20:58:10,672 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 20:58:10,672 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 20:58:10,672 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 20:58:10,673 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 20:58:10,673 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 20:58:10,673 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 20:58:10,674 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 20:58:10,674 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 20:58:10,674 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 20:58:10,675 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 20:58:10,675 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 20:58:10,675 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 20:58:10,675 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 20:58:10,675 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 20:58:10,676 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 20:58:10,676 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 20:58:10,676 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 20:58:10,676 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 20:58:10,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 20:58:10,895 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 20:58:10,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 20:58:10,897 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 20:58:10,898 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 20:58:10,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i [2023-12-05 20:58:11,873 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 20:58:12,086 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 20:58:12,087 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i [2023-12-05 20:58:12,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badd9fbaa/39672241b5984c8692640bad8734df9b/FLAG59a6f1752 [2023-12-05 20:58:12,110 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/badd9fbaa/39672241b5984c8692640bad8734df9b [2023-12-05 20:58:12,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 20:58:12,112 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 20:58:12,113 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 20:58:12,113 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 20:58:12,116 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 20:58:12,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f056073 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12, skipping insertion in model container [2023-12-05 20:58:12,118 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,160 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 20:58:12,366 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 20:58:12,376 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 20:58:12,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 20:58:12,447 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 20:58:12,447 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 20:58:12,452 INFO L206 MainTranslator]: Completed translation [2023-12-05 20:58:12,452 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12 WrapperNode [2023-12-05 20:58:12,452 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 20:58:12,453 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 20:58:12,453 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 20:58:12,454 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 20:58:12,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,499 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2023-12-05 20:58:12,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 20:58:12,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 20:58:12,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 20:58:12,501 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 20:58:12,507 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,513 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,514 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,532 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 20:58:12,533 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 20:58:12,533 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 20:58:12,533 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 20:58:12,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (1/1) ... [2023-12-05 20:58:12,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 20:58:12,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 20:58:12,559 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 20:58:12,578 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 20:58:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-12-05 20:58:12,584 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-12-05 20:58:12,584 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-12-05 20:58:12,584 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-12-05 20:58:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 20:58:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 20:58:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 20:58:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 20:58:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 20:58:12,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 20:58:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 20:58:12,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 20:58:12,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 20:58:12,587 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 20:58:12,698 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 20:58:12,699 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 20:58:12,827 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 20:58:12,835 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 20:58:12,835 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-05 20:58:12,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:58:12 BoogieIcfgContainer [2023-12-05 20:58:12,836 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 20:58:12,838 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 20:58:12,838 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 20:58:12,840 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 20:58:12,840 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 08:58:12" (1/3) ... [2023-12-05 20:58:12,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3772c098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:58:12, skipping insertion in model container [2023-12-05 20:58:12,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 08:58:12" (2/3) ... [2023-12-05 20:58:12,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3772c098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 08:58:12, skipping insertion in model container [2023-12-05 20:58:12,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 08:58:12" (3/3) ... [2023-12-05 20:58:12,842 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2023-12-05 20:58:12,853 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 20:58:12,853 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-12-05 20:58:12,853 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 20:58:12,901 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 20:58:12,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 104 transitions, 216 flow [2023-12-05 20:58:12,961 INFO L124 PetriNetUnfolderBase]: 8/102 cut-off events. [2023-12-05 20:58:12,961 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 20:58:12,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 102 events. 8/102 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 96 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2023-12-05 20:58:12,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 104 transitions, 216 flow [2023-12-05 20:58:12,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 102 transitions, 210 flow [2023-12-05 20:58:12,974 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 20:58:12,981 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;@5354a7fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 20:58:12,981 INFO L363 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-05 20:58:12,998 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 20:58:12,998 INFO L124 PetriNetUnfolderBase]: 0/25 cut-off events. [2023-12-05 20:58:12,998 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 20:58:12,999 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 20:58:12,999 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 20:58:13,011 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-12-05 20:58:13,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 20:58:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1665938597, now seen corresponding path program 1 times [2023-12-05 20:58:13,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 20:58:13,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099987393] [2023-12-05 20:58:13,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 20:58:13,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 20:58:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 20:58:13,316 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 20:58:13,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 20:58:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099987393] [2023-12-05 20:58:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099987393] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 20:58:13,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 20:58:13,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 20:58:13,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980246455] [2023-12-05 20:58:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 20:58:13,324 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 20:58:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 20:58:13,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 20:58:13,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 20:58:13,347 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 104 [2023-12-05 20:58:13,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 20:58:13,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 20:58:13,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 104 [2023-12-05 20:58:13,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 20:58:13,384 INFO L124 PetriNetUnfolderBase]: 3/93 cut-off events. [2023-12-05 20:58:13,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 20:58:13,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117 conditions, 93 events. 3/93 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 76 event pairs, 0 based on Foata normal form. 16/103 useless extension candidates. Maximal degree in co-relation 75. Up to 9 conditions per place. [2023-12-05 20:58:13,386 INFO L140 encePairwiseOnDemand]: 96/104 looper letters, 14 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-12-05 20:58:13,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 93 transitions, 224 flow [2023-12-05 20:58:13,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 20:58:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 20:58:13,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-12-05 20:58:13,409 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8557692307692307 [2023-12-05 20:58:13,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-12-05 20:58:13,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-12-05 20:58:13,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 20:58:13,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-12-05 20:58:13,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 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 20:58:13,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 20:58:13,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 20:58:13,420 INFO L308 CegarLoopForPetriNet]: 101 programPoint places, -2 predicate places. [2023-12-05 20:58:13,420 INFO L500 AbstractCegarLoop]: Abstraction has has 99 places, 93 transitions, 224 flow [2023-12-05 20:58:13,420 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 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 20:58:13,420 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 20:58:13,420 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 20:58:13,421 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 20:58:13,421 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-12-05 20:58:13,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 20:58:13,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1665938596, now seen corresponding path program 1 times [2023-12-05 20:58:13,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 20:58:13,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102510124] [2023-12-05 20:58:13,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 20:58:13,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 20:58:13,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 20:58:13,549 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 20:58:13,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 20:58:13,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102510124] [2023-12-05 20:58:13,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102510124] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 20:58:13,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 20:58:13,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 20:58:13,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509048239] [2023-12-05 20:58:13,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 20:58:13,551 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 20:58:13,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 20:58:13,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 20:58:13,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 20:58:13,552 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 104 [2023-12-05 20:58:13,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 93 transitions, 224 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 20:58:13,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 20:58:13,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 104 [2023-12-05 20:58:13,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 20:58:13,586 INFO L124 PetriNetUnfolderBase]: 3/92 cut-off events. [2023-12-05 20:58:13,586 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-12-05 20:58:13,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 92 events. 3/92 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 81. Up to 9 conditions per place. [2023-12-05 20:58:13,588 INFO L140 encePairwiseOnDemand]: 101/104 looper letters, 11 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-12-05 20:58:13,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 246 flow [2023-12-05 20:58:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 20:58:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 20:58:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-12-05 20:58:13,590 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.842948717948718 [2023-12-05 20:58:13,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-12-05 20:58:13,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-12-05 20:58:13,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 20:58:13,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-12-05 20:58:13,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 20:58:13,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 20:58:13,593 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 20:58:13,594 INFO L308 CegarLoopForPetriNet]: 101 programPoint places, -1 predicate places. [2023-12-05 20:58:13,594 INFO L500 AbstractCegarLoop]: Abstraction has has 100 places, 92 transitions, 246 flow [2023-12-05 20:58:13,594 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 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 20:58:13,594 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 20:58:13,594 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 20:58:13,594 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 20:58:13,595 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-12-05 20:58:13,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 20:58:13,595 INFO L85 PathProgramCache]: Analyzing trace with hash 183946028, now seen corresponding path program 1 times [2023-12-05 20:58:13,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 20:58:13,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810724946] [2023-12-05 20:58:13,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 20:58:13,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 20:58:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 20:58:13,682 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 20:58:13,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 20:58:13,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810724946] [2023-12-05 20:58:13,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810724946] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 20:58:13,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 20:58:13,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 20:58:13,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337283441] [2023-12-05 20:58:13,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 20:58:13,685 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 20:58:13,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 20:58:13,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 20:58:13,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 20:58:13,690 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 104 [2023-12-05 20:58:13,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 92 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 20:58:13,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 20:58:13,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 104 [2023-12-05 20:58:13,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 20:58:13,743 INFO L124 PetriNetUnfolderBase]: 3/91 cut-off events. [2023-12-05 20:58:13,743 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-12-05 20:58:13,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 91 events. 3/91 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 69 event pairs, 0 based on Foata normal form. 1/88 useless extension candidates. Maximal degree in co-relation 85. Up to 9 conditions per place. [2023-12-05 20:58:13,744 INFO L140 encePairwiseOnDemand]: 101/104 looper letters, 11 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-12-05 20:58:13,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 91 transitions, 268 flow [2023-12-05 20:58:13,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 20:58:13,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 20:58:13,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-12-05 20:58:13,747 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.842948717948718 [2023-12-05 20:58:13,747 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-12-05 20:58:13,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-12-05 20:58:13,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 20:58:13,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-12-05 20:58:13,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 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 20:58:13,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 20:58:13,750 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 20:58:13,750 INFO L308 CegarLoopForPetriNet]: 101 programPoint places, 0 predicate places. [2023-12-05 20:58:13,750 INFO L500 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 268 flow [2023-12-05 20:58:13,750 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 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 20:58:13,750 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 20:58:13,751 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 20:58:13,751 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 20:58:13,751 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-12-05 20:58:13,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 20:58:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 183946027, now seen corresponding path program 1 times [2023-12-05 20:58:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 20:58:13,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638293196] [2023-12-05 20:58:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 20:58:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 20:58:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 20:58:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 20:58:13,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 20:58:13,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638293196] [2023-12-05 20:58:13,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638293196] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 20:58:13,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 20:58:13,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 20:58:13,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333177687] [2023-12-05 20:58:13,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 20:58:13,820 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 20:58:13,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 20:58:13,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 20:58:13,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 20:58:13,821 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 104 [2023-12-05 20:58:13,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 268 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 20:58:13,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 20:58:13,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 104 [2023-12-05 20:58:13,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 20:58:13,863 INFO L124 PetriNetUnfolderBase]: 3/90 cut-off events. [2023-12-05 20:58:13,863 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-12-05 20:58:13,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 90 events. 3/90 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 1/87 useless extension candidates. Maximal degree in co-relation 88. Up to 10 conditions per place. [2023-12-05 20:58:13,867 INFO L140 encePairwiseOnDemand]: 101/104 looper letters, 0 selfloop transitions, 0 changer transitions 90/90 dead transitions. [2023-12-05 20:58:13,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 90 transitions, 290 flow [2023-12-05 20:58:13,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 20:58:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 20:58:13,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-12-05 20:58:13,869 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8269230769230769 [2023-12-05 20:58:13,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-12-05 20:58:13,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-12-05 20:58:13,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 20:58:13,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-12-05 20:58:13,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 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 20:58:13,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 20:58:13,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 20:58:13,875 INFO L308 CegarLoopForPetriNet]: 101 programPoint places, 1 predicate places. [2023-12-05 20:58:13,875 INFO L500 AbstractCegarLoop]: Abstraction has has 102 places, 90 transitions, 290 flow [2023-12-05 20:58:13,875 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 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 20:58:13,883 INFO L161 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/fib_unsafe-5.i_BEv2_AllErrorsAtOnce [2023-12-05 20:58:13,910 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2023-12-05 20:58:13,911 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-12-05 20:58:13,911 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-12-05 20:58:13,911 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-12-05 20:58:13,911 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-12-05 20:58:13,911 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2023-12-05 20:58:13,911 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 20:58:13,912 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-05 20:58:13,914 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-05 20:58:13,914 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-12-05 20:58:13,919 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 08:58:13 BasicIcfg [2023-12-05 20:58:13,919 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-05 20:58:13,920 INFO L158 Benchmark]: Toolchain (without parser) took 1807.29ms. Allocated memory is still 260.0MB. Free memory was 203.0MB in the beginning and 212.5MB in the end (delta: -9.5MB). Peak memory consumption was 74.0MB. Max. memory is 8.0GB. [2023-12-05 20:58:13,920 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 215.0MB. Free memory was 162.9MB in the beginning and 162.7MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-05 20:58:13,920 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.67ms. Allocated memory is still 260.0MB. Free memory was 202.5MB in the beginning and 183.1MB in the end (delta: 19.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-05 20:58:13,920 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.82ms. Allocated memory is still 260.0MB. Free memory was 183.1MB in the beginning and 181.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 20:58:13,921 INFO L158 Benchmark]: Boogie Preprocessor took 32.19ms. Allocated memory is still 260.0MB. Free memory was 181.0MB in the beginning and 179.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-05 20:58:13,921 INFO L158 Benchmark]: RCFGBuilder took 303.28ms. Allocated memory is still 260.0MB. Free memory was 179.5MB in the beginning and 164.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-05 20:58:13,921 INFO L158 Benchmark]: TraceAbstraction took 1081.43ms. Allocated memory is still 260.0MB. Free memory was 163.7MB in the beginning and 212.5MB in the end (delta: -48.7MB). Peak memory consumption was 35.2MB. Max. memory is 8.0GB. [2023-12-05 20:58:13,923 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 215.0MB. Free memory was 162.9MB in the beginning and 162.7MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 339.67ms. Allocated memory is still 260.0MB. Free memory was 202.5MB in the beginning and 183.1MB in the end (delta: 19.4MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 46.82ms. Allocated memory is still 260.0MB. Free memory was 183.1MB in the beginning and 181.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.19ms. Allocated memory is still 260.0MB. Free memory was 181.0MB in the beginning and 179.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 303.28ms. Allocated memory is still 260.0MB. Free memory was 179.5MB in the beginning and 164.8MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 1081.43ms. Allocated memory is still 260.0MB. Free memory was 163.7MB in the beginning and 212.5MB in the end (delta: -48.7MB). Peak memory consumption was 35.2MB. 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 119 locations, 6 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: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18 mSDsluCounter, 30 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54 IncrementalHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 30 mSDtfsCounter, 54 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=290occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 312 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-05 20:58:13,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...