/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-nonblocking-cntr.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:21:06,377 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:21:06,441 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 21:21:06,466 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:21:06,466 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:21:06,467 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:21:06,467 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:21:06,467 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:21:06,468 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:21:06,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:21:06,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:21:06,473 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:21:06,473 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:21:06,474 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:21:06,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:21:06,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:21:06,475 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:21:06,475 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:21:06,475 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:21:06,475 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:21:06,475 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:21:06,476 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:21:06,476 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:21:06,476 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:21:06,476 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:21:06,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:21:06,478 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:21:06,478 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:21:06,478 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:21:06,478 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:21:06,479 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:21:06,479 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:21:06,479 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:21:06,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:21:06,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:21:06,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:21:06,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:21:06,657 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:21:06,657 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:21:06,658 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-12-05 21:21:07,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:21:07,820 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:21:07,820 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr.wvr.c [2023-12-05 21:21:07,827 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe5c12c35/db9fe2830c3b4270b5f7d460813f5fbf/FLAG0a5934d95 [2023-12-05 21:21:07,840 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe5c12c35/db9fe2830c3b4270b5f7d460813f5fbf [2023-12-05 21:21:07,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:21:07,844 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:21:07,846 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:21:07,846 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:21:07,848 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:21:07,850 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:21:07" (1/1) ... [2023-12-05 21:21:07,851 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@749f2a0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:07, skipping insertion in model container [2023-12-05 21:21:07,852 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:21:07" (1/1) ... [2023-12-05 21:21:07,875 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:21:08,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:21:08,021 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:21:08,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:21:08,051 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:21:08,051 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:21:08,056 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:21:08,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08 WrapperNode [2023-12-05 21:21:08,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:21:08,058 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:21:08,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:21:08,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:21:08,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,077 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,094 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 55 [2023-12-05 21:21:08,094 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:21:08,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:21:08,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:21:08,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:21:08,101 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,105 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,106 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,121 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,125 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,126 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,127 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:21:08,128 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:21:08,128 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:21:08,128 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:21:08,128 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (1/1) ... [2023-12-05 21:21:08,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:21:08,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:08,148 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 21:21:08,153 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 21:21:08,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:21:08,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-05 21:21:08,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-05 21:21:08,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-05 21:21:08,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-05 21:21:08,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:21:08,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:21:08,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:21:08,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:21:08,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:21:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:21:08,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:21:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:21:08,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:21:08,170 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 21:21:08,249 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:21:08,251 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:21:08,405 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:21:08,432 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:21:08,432 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-05 21:21:08,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:21:08 BoogieIcfgContainer [2023-12-05 21:21:08,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:21:08,435 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:21:08,435 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:21:08,437 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:21:08,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:21:07" (1/3) ... [2023-12-05 21:21:08,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2780ddd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:21:08, skipping insertion in model container [2023-12-05 21:21:08,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:08" (2/3) ... [2023-12-05 21:21:08,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2780ddd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:21:08, skipping insertion in model container [2023-12-05 21:21:08,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:21:08" (3/3) ... [2023-12-05 21:21:08,439 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2023-12-05 21:21:08,451 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:21:08,452 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-12-05 21:21:08,452 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:21:08,487 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:21:08,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 92 transitions, 198 flow [2023-12-05 21:21:08,547 INFO L124 PetriNetUnfolderBase]: 6/90 cut-off events. [2023-12-05 21:21:08,547 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:21:08,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 90 events. 6/90 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2023-12-05 21:21:08,551 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 92 transitions, 198 flow [2023-12-05 21:21:08,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 145 flow [2023-12-05 21:21:08,562 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:21:08,568 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;@707e5de1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:21:08,568 INFO L363 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-12-05 21:21:08,578 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:21:08,579 INFO L124 PetriNetUnfolderBase]: 1/27 cut-off events. [2023-12-05 21:21:08,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:21:08,579 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:08,579 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 21:21:08,580 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 21:21:08,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:08,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1947582333, now seen corresponding path program 1 times [2023-12-05 21:21:08,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:08,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50216126] [2023-12-05 21:21:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:08,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:08,876 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 21:21:08,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:08,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50216126] [2023-12-05 21:21:08,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50216126] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:08,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:08,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:21:08,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768259194] [2023-12-05 21:21:08,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:08,884 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:08,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:08,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:08,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:08,928 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 92 [2023-12-05 21:21:08,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 145 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 21:21:08,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:08,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 92 [2023-12-05 21:21:08,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:09,030 INFO L124 PetriNetUnfolderBase]: 29/154 cut-off events. [2023-12-05 21:21:09,030 INFO L125 PetriNetUnfolderBase]: For 11/14 co-relation queries the response was YES. [2023-12-05 21:21:09,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 154 events. 29/154 cut-off events. For 11/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 466 event pairs, 10 based on Foata normal form. 31/159 useless extension candidates. Maximal degree in co-relation 137. Up to 54 conditions per place. [2023-12-05 21:21:09,033 INFO L140 encePairwiseOnDemand]: 86/92 looper letters, 17 selfloop transitions, 1 changer transitions 2/63 dead transitions. [2023-12-05 21:21:09,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 63 transitions, 173 flow [2023-12-05 21:21:09,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:09,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 207 transitions. [2023-12-05 21:21:09,045 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.75 [2023-12-05 21:21:09,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 207 transitions. [2023-12-05 21:21:09,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 207 transitions. [2023-12-05 21:21:09,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:09,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 207 transitions. [2023-12-05 21:21:09,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 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 21:21:09,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 21:21:09,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 21:21:09,091 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-12-05 21:21:09,092 INFO L500 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 173 flow [2023-12-05 21:21:09,092 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 21:21:09,092 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:09,092 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 21:21:09,093 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:21:09,093 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 21:21:09,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1947582332, now seen corresponding path program 1 times [2023-12-05 21:21:09,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:09,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25092796] [2023-12-05 21:21:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:09,317 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 21:21:09,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:09,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25092796] [2023-12-05 21:21:09,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25092796] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:09,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:09,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:21:09,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516555612] [2023-12-05 21:21:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:09,319 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:21:09,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:09,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:21:09,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:21:09,320 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 92 [2023-12-05 21:21:09,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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 21:21:09,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:09,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 92 [2023-12-05 21:21:09,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:09,392 INFO L124 PetriNetUnfolderBase]: 27/153 cut-off events. [2023-12-05 21:21:09,392 INFO L125 PetriNetUnfolderBase]: For 42/58 co-relation queries the response was YES. [2023-12-05 21:21:09,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 153 events. 27/153 cut-off events. For 42/58 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 462 event pairs, 10 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 151. Up to 51 conditions per place. [2023-12-05 21:21:09,393 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 17 selfloop transitions, 1 changer transitions 2/61 dead transitions. [2023-12-05 21:21:09,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 61 transitions, 203 flow [2023-12-05 21:21:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:09,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 198 transitions. [2023-12-05 21:21:09,396 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.717391304347826 [2023-12-05 21:21:09,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 198 transitions. [2023-12-05 21:21:09,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 198 transitions. [2023-12-05 21:21:09,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:09,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 198 transitions. [2023-12-05 21:21:09,397 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 21:21:09,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 21:21:09,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 21:21:09,399 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-12-05 21:21:09,399 INFO L500 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 203 flow [2023-12-05 21:21:09,399 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 4 states have internal predecessors, (243), 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 21:21:09,399 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:09,399 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 21:21:09,399 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:21:09,400 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-12-05 21:21:09,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:09,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1639595825, now seen corresponding path program 1 times [2023-12-05 21:21:09,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:09,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646403975] [2023-12-05 21:21:09,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:09,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:09,475 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 21:21:09,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:09,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646403975] [2023-12-05 21:21:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646403975] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:09,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:09,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:21:09,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099240990] [2023-12-05 21:21:09,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:09,479 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:09,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:09,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:09,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:09,480 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 92 [2023-12-05 21:21:09,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 21:21:09,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:09,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 92 [2023-12-05 21:21:09,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:09,528 INFO L124 PetriNetUnfolderBase]: 23/133 cut-off events. [2023-12-05 21:21:09,529 INFO L125 PetriNetUnfolderBase]: For 95/127 co-relation queries the response was YES. [2023-12-05 21:21:09,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286 conditions, 133 events. 23/133 cut-off events. For 95/127 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 353 event pairs, 8 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 156. Up to 43 conditions per place. [2023-12-05 21:21:09,533 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 15 selfloop transitions, 1 changer transitions 2/59 dead transitions. [2023-12-05 21:21:09,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 59 transitions, 225 flow [2023-12-05 21:21:09,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-12-05 21:21:09,536 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7318840579710145 [2023-12-05 21:21:09,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-12-05 21:21:09,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-12-05 21:21:09,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:09,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-12-05 21:21:09,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 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 21:21:09,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 21:21:09,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 21:21:09,541 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-12-05 21:21:09,541 INFO L500 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 225 flow [2023-12-05 21:21:09,541 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 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 21:21:09,541 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:09,541 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 21:21:09,541 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:21:09,542 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-12-05 21:21:09,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:09,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1639595824, now seen corresponding path program 1 times [2023-12-05 21:21:09,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:09,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301876597] [2023-12-05 21:21:09,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:09,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:09,614 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 21:21:09,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:09,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301876597] [2023-12-05 21:21:09,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301876597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:09,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:09,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:21:09,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536239546] [2023-12-05 21:21:09,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:09,615 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:09,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:09,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:09,619 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 92 [2023-12-05 21:21:09,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 225 flow. Second operand has 3 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 21:21:09,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:09,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 92 [2023-12-05 21:21:09,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:09,652 INFO L124 PetriNetUnfolderBase]: 19/113 cut-off events. [2023-12-05 21:21:09,652 INFO L125 PetriNetUnfolderBase]: For 164/212 co-relation queries the response was YES. [2023-12-05 21:21:09,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 113 events. 19/113 cut-off events. For 164/212 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 218 event pairs, 6 based on Foata normal form. 3/103 useless extension candidates. Maximal degree in co-relation 155. Up to 35 conditions per place. [2023-12-05 21:21:09,653 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 0 selfloop transitions, 0 changer transitions 57/57 dead transitions. [2023-12-05 21:21:09,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 57 transitions, 241 flow [2023-12-05 21:21:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2023-12-05 21:21:09,655 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7427536231884058 [2023-12-05 21:21:09,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 205 transitions. [2023-12-05 21:21:09,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 205 transitions. [2023-12-05 21:21:09,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:09,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 205 transitions. [2023-12-05 21:21:09,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 21:21:09,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 21:21:09,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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 21:21:09,659 INFO L308 CegarLoopForPetriNet]: 70 programPoint places, 0 predicate places. [2023-12-05 21:21:09,659 INFO L500 AbstractCegarLoop]: Abstraction has has 70 places, 57 transitions, 241 flow [2023-12-05 21:21:09,659 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 21:21:09,665 INFO L161 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/popl20-nonblocking-cntr.wvr.c_BEv2_AllErrorsAtOnce [2023-12-05 21:21:09,688 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 10 remaining) [2023-12-05 21:21:09,689 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-12-05 21:21:09,689 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-12-05 21:21:09,689 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-12-05 21:21:09,689 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-12-05 21:21:09,689 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-12-05 21:21:09,689 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 10 remaining) [2023-12-05 21:21:09,689 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-12-05 21:21:09,689 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 10 remaining) [2023-12-05 21:21:09,690 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 10 remaining) [2023-12-05 21:21:09,690 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:21:09,690 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-05 21:21:09,696 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-05 21:21:09,696 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-12-05 21:21:09,703 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:21:09 BasicIcfg [2023-12-05 21:21:09,704 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-05 21:21:09,704 INFO L158 Benchmark]: Toolchain (without parser) took 1860.39ms. Allocated memory is still 291.5MB. Free memory was 245.3MB in the beginning and 181.6MB in the end (delta: 63.7MB). Peak memory consumption was 64.7MB. Max. memory is 8.0GB. [2023-12-05 21:21:09,705 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 173.0MB. Free memory is still 120.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-05 21:21:09,707 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.05ms. Allocated memory is still 291.5MB. Free memory was 245.3MB in the beginning and 234.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-05 21:21:09,707 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.57ms. Allocated memory is still 291.5MB. Free memory was 234.3MB in the beginning and 232.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:21:09,707 INFO L158 Benchmark]: Boogie Preprocessor took 32.56ms. Allocated memory is still 291.5MB. Free memory was 232.7MB in the beginning and 231.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-05 21:21:09,710 INFO L158 Benchmark]: RCFGBuilder took 306.03ms. Allocated memory is still 291.5MB. Free memory was 231.1MB in the beginning and 214.9MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-05 21:21:09,711 INFO L158 Benchmark]: TraceAbstraction took 1268.34ms. Allocated memory is still 291.5MB. Free memory was 214.3MB in the beginning and 181.6MB in the end (delta: 32.7MB). Peak memory consumption was 34.3MB. Max. memory is 8.0GB. [2023-12-05 21:21:09,713 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 173.0MB. Free memory is still 120.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 211.05ms. Allocated memory is still 291.5MB. Free memory was 245.3MB in the beginning and 234.3MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 36.57ms. Allocated memory is still 291.5MB. Free memory was 234.3MB in the beginning and 232.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.56ms. Allocated memory is still 291.5MB. Free memory was 232.7MB in the beginning and 231.1MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 306.03ms. Allocated memory is still 291.5MB. Free memory was 231.1MB in the beginning and 214.9MB in the end (delta: 16.3MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 1268.34ms. Allocated memory is still 291.5MB. Free memory was 214.3MB in the beginning and 181.6MB in the end (delta: 32.7MB). Peak memory consumption was 34.3MB. 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, 107 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: 1.2s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, 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=241occurred 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, 0.5s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 509 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 21:21:09,729 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...