/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/10-synch_03-two_unique.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:12:35,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:12:35,261 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 21:12:35,295 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:12:35,295 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:12:35,296 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:12:35,296 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:12:35,296 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:12:35,296 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:12:35,297 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:12:35,297 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:12:35,297 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:12:35,297 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:12:35,298 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:12:35,298 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:12:35,298 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:12:35,298 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:12:35,299 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:12:35,299 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:12:35,299 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:12:35,299 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:12:35,300 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:12:35,300 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:12:35,300 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:12:35,301 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:12:35,301 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:12:35,301 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:12:35,301 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:12:35,301 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:12:35,302 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:12:35,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:12:35,302 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:12:35,302 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:12:35,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:12:35,499 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:12:35,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:12:35,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:12:35,525 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:12:35,525 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:12:35,526 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/10-synch_03-two_unique.i [2023-12-05 21:12:36,639 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:12:36,835 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:12:36,836 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/10-synch_03-two_unique.i [2023-12-05 21:12:36,849 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/983c993b3/11da8b6e061943eba74f69b26879276c/FLAGe84adc52e [2023-12-05 21:12:36,859 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/983c993b3/11da8b6e061943eba74f69b26879276c [2023-12-05 21:12:36,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:12:36,862 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:12:36,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:12:36,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:12:36,866 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:12:36,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:12:36" (1/1) ... [2023-12-05 21:12:36,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2635c485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:36, skipping insertion in model container [2023-12-05 21:12:36,867 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:12:36" (1/1) ... [2023-12-05 21:12:36,901 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:12:37,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:12:37,241 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:12:37,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:12:37,323 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:12:37,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37 WrapperNode [2023-12-05 21:12:37,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:12:37,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:12:37,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:12:37,325 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:12:37,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,355 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,369 INFO L138 Inliner]: procedures = 260, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2023-12-05 21:12:37,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:12:37,370 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:12:37,370 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:12:37,370 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:12:37,375 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,392 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,393 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,394 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,394 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,396 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:12:37,396 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:12:37,396 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:12:37,396 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:12:37,397 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (1/1) ... [2023-12-05 21:12:37,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:12:37,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:12:37,425 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 21:12:37,429 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 21:12:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2023-12-05 21:12:37,457 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2023-12-05 21:12:37,457 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2023-12-05 21:12:37,458 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2023-12-05 21:12:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:12:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:12:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:12:37,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:12:37,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:12:37,459 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 21:12:37,557 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:12:37,559 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:12:37,703 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:12:37,710 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:12:37,711 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-05 21:12:37,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:12:37 BoogieIcfgContainer [2023-12-05 21:12:37,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:12:37,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:12:37,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:12:37,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:12:37,716 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:12:36" (1/3) ... [2023-12-05 21:12:37,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aa4a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:12:37, skipping insertion in model container [2023-12-05 21:12:37,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:12:37" (2/3) ... [2023-12-05 21:12:37,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24aa4a0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:12:37, skipping insertion in model container [2023-12-05 21:12:37,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:12:37" (3/3) ... [2023-12-05 21:12:37,718 INFO L112 eAbstractionObserver]: Analyzing ICFG 10-synch_03-two_unique.i [2023-12-05 21:12:37,731 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:12:37,731 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-12-05 21:12:37,731 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:12:37,764 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:12:37,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 42 transitions, 92 flow [2023-12-05 21:12:37,806 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2023-12-05 21:12:37,806 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:12:37,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 25 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-12-05 21:12:37,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 42 transitions, 92 flow [2023-12-05 21:12:37,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 28 places, 24 transitions, 51 flow [2023-12-05 21:12:37,827 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:12:37,832 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;@1396445, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:12:37,833 INFO L363 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-05 21:12:37,840 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:12:37,840 INFO L124 PetriNetUnfolderBase]: 0/11 cut-off events. [2023-12-05 21:12:37,840 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:12:37,842 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:37,843 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:37,843 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 21:12:37,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1295934110, now seen corresponding path program 1 times [2023-12-05 21:12:37,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:37,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516090238] [2023-12-05 21:12:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:37,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:38,084 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 21:12:38,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:38,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516090238] [2023-12-05 21:12:38,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516090238] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:38,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:38,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:12:38,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730888176] [2023-12-05 21:12:38,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:38,092 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:12:38,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:38,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:12:38,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:12:38,113 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 42 [2023-12-05 21:12:38,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 51 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 21:12:38,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:38,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 42 [2023-12-05 21:12:38,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:38,132 INFO L124 PetriNetUnfolderBase]: 0/23 cut-off events. [2023-12-05 21:12:38,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:12:38,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 23 events. 0/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 12 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-12-05 21:12:38,133 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 7 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-12-05 21:12:38,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 65 flow [2023-12-05 21:12:38,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2023-12-05 21:12:38,142 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2023-12-05 21:12:38,142 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 90 transitions. [2023-12-05 21:12:38,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 90 transitions. [2023-12-05 21:12:38,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:38,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 90 transitions. [2023-12-05 21:12:38,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 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 21:12:38,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:12:38,149 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:12:38,152 INFO L308 CegarLoopForPetriNet]: 28 programPoint places, 1 predicate places. [2023-12-05 21:12:38,152 INFO L500 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 65 flow [2023-12-05 21:12:38,152 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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 21:12:38,152 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:38,152 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:38,153 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:12:38,153 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 21:12:38,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:38,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1295934111, now seen corresponding path program 1 times [2023-12-05 21:12:38,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:38,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292237626] [2023-12-05 21:12:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:38,325 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 21:12:38,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:38,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292237626] [2023-12-05 21:12:38,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292237626] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:38,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:38,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:12:38,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023831595] [2023-12-05 21:12:38,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:38,327 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:12:38,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:38,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:12:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:12:38,328 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 42 [2023-12-05 21:12:38,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 65 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 21:12:38,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:38,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 42 [2023-12-05 21:12:38,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:38,349 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-12-05 21:12:38,349 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-12-05 21:12:38,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 22 events. 0/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-12-05 21:12:38,349 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 7 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-12-05 21:12:38,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 22 transitions, 77 flow [2023-12-05 21:12:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:38,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-12-05 21:12:38,352 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2023-12-05 21:12:38,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-12-05 21:12:38,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-12-05 21:12:38,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:38,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-12-05 21:12:38,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 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 21:12:38,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:12:38,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:12:38,355 INFO L308 CegarLoopForPetriNet]: 28 programPoint places, 2 predicate places. [2023-12-05 21:12:38,355 INFO L500 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 77 flow [2023-12-05 21:12:38,355 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 21:12:38,355 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:38,355 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:38,355 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:12:38,355 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-12-05 21:12:38,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:38,356 INFO L85 PathProgramCache]: Analyzing trace with hash 484959551, now seen corresponding path program 1 times [2023-12-05 21:12:38,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:38,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293067032] [2023-12-05 21:12:38,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:38,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:38,422 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 21:12:38,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:38,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293067032] [2023-12-05 21:12:38,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293067032] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:38,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:38,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:12:38,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217868392] [2023-12-05 21:12:38,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:38,423 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:12:38,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:38,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:12:38,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:12:38,424 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 42 [2023-12-05 21:12:38,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 21:12:38,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:38,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 42 [2023-12-05 21:12:38,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:38,435 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-12-05 21:12:38,435 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-12-05 21:12:38,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 21 events. 0/21 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 8 event pairs, 0 based on Foata normal form. 1/22 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2023-12-05 21:12:38,435 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 6 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-12-05 21:12:38,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 21 transitions, 85 flow [2023-12-05 21:12:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2023-12-05 21:12:38,436 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7063492063492064 [2023-12-05 21:12:38,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 89 transitions. [2023-12-05 21:12:38,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 89 transitions. [2023-12-05 21:12:38,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:38,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 89 transitions. [2023-12-05 21:12:38,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 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 21:12:38,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:12:38,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:12:38,438 INFO L308 CegarLoopForPetriNet]: 28 programPoint places, 3 predicate places. [2023-12-05 21:12:38,439 INFO L500 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 85 flow [2023-12-05 21:12:38,439 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 21:12:38,439 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:12:38,439 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:12:38,439 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:12:38,439 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-12-05 21:12:38,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:12:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash 484959552, now seen corresponding path program 1 times [2023-12-05 21:12:38,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:12:38,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248506567] [2023-12-05 21:12:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:12:38,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:12:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:12:38,543 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 21:12:38,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:12:38,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248506567] [2023-12-05 21:12:38,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248506567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:12:38,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:12:38,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:12:38,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242835530] [2023-12-05 21:12:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:12:38,545 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:12:38,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:12:38,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:12:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:12:38,546 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 42 [2023-12-05 21:12:38,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 21:12:38,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:12:38,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 42 [2023-12-05 21:12:38,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:12:38,563 INFO L124 PetriNetUnfolderBase]: 0/20 cut-off events. [2023-12-05 21:12:38,563 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-12-05 21:12:38,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 20 events. 0/20 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-12-05 21:12:38,564 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-12-05 21:12:38,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 20 transitions, 89 flow [2023-12-05 21:12:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:12:38,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:12:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2023-12-05 21:12:38,565 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2023-12-05 21:12:38,565 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 93 transitions. [2023-12-05 21:12:38,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 93 transitions. [2023-12-05 21:12:38,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:12:38,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 93 transitions. [2023-12-05 21:12:38,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 21:12:38,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:12:38,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 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 21:12:38,569 INFO L308 CegarLoopForPetriNet]: 28 programPoint places, 4 predicate places. [2023-12-05 21:12:38,569 INFO L500 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 89 flow [2023-12-05 21:12:38,569 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 21:12:38,573 INFO L161 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/10-synch_03-two_unique.i_BEv2_AllErrorsAtOnce [2023-12-05 21:12:38,584 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2023-12-05 21:12:38,585 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-12-05 21:12:38,585 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-12-05 21:12:38,585 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-12-05 21:12:38,585 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2023-12-05 21:12:38,585 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2023-12-05 21:12:38,585 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:12:38,586 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-12-05 21:12:38,588 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-05 21:12:38,588 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-12-05 21:12:38,595 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:12:38 BasicIcfg [2023-12-05 21:12:38,595 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-05 21:12:38,596 INFO L158 Benchmark]: Toolchain (without parser) took 1734.10ms. Allocated memory is still 292.6MB. Free memory was 237.1MB in the beginning and 189.0MB in the end (delta: 48.1MB). Peak memory consumption was 48.6MB. Max. memory is 8.0GB. [2023-12-05 21:12:38,596 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 196.1MB. Free memory was 143.7MB in the beginning and 143.6MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-05 21:12:38,596 INFO L158 Benchmark]: CACSL2BoogieTranslator took 461.53ms. Allocated memory is still 292.6MB. Free memory was 237.1MB in the beginning and 210.4MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. [2023-12-05 21:12:38,597 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.23ms. Allocated memory is still 292.6MB. Free memory was 210.4MB in the beginning and 208.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:12:38,597 INFO L158 Benchmark]: Boogie Preprocessor took 26.08ms. Allocated memory is still 292.6MB. Free memory was 208.3MB in the beginning and 207.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-05 21:12:38,597 INFO L158 Benchmark]: RCFGBuilder took 315.90ms. Allocated memory is still 292.6MB. Free memory was 206.7MB in the beginning and 194.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-05 21:12:38,598 INFO L158 Benchmark]: TraceAbstraction took 881.53ms. Allocated memory is still 292.6MB. Free memory was 194.1MB in the beginning and 189.0MB in the end (delta: 5.1MB). Peak memory consumption was 5.6MB. Max. memory is 8.0GB. [2023-12-05 21:12:38,599 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 196.1MB. Free memory was 143.7MB in the beginning and 143.6MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 461.53ms. Allocated memory is still 292.6MB. Free memory was 237.1MB in the beginning and 210.4MB in the end (delta: 26.7MB). Peak memory consumption was 27.3MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 44.23ms. Allocated memory is still 292.6MB. Free memory was 210.4MB in the beginning and 208.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 26.08ms. Allocated memory is still 292.6MB. Free memory was 208.3MB in the beginning and 207.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 315.90ms. Allocated memory is still 292.6MB. Free memory was 206.7MB in the beginning and 194.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 881.53ms. Allocated memory is still 292.6MB. Free memory was 194.1MB in the beginning and 189.0MB in the end (delta: 5.1MB). Peak memory consumption was 5.6MB. 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, 55 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: 0.8s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 14 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23 IncrementalHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 13 mSDtfsCounter, 23 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89occurred in iteration=4, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 214 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 21:12:38,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...