/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/28-race_reach_22-deref_read_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:15:56,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:15:57,025 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 21:15:57,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:15:57,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:15:57,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:15:57,045 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:15:57,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:15:57,046 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:15:57,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:15:57,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:15:57,046 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:15:57,047 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:15:57,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:15:57,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:15:57,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:15:57,048 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:15:57,048 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:15:57,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:15:57,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:15:57,048 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:15:57,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:15:57,049 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:15:57,049 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:15:57,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:15:57,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:15:57,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:15:57,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:15:57,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:15:57,051 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:15:57,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:15:57,051 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:15:57,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:15:57,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:15:57,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:15:57,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:15:57,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:15:57,253 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:15:57,254 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:15:57,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-12-05 21:15:58,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:15:58,451 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:15:58,451 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_22-deref_read_racefree.i [2023-12-05 21:15:58,471 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c260bf7ea/bfaa70b05b704f0f8d5752646cc51bbf/FLAG301c41271 [2023-12-05 21:15:58,482 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c260bf7ea/bfaa70b05b704f0f8d5752646cc51bbf [2023-12-05 21:15:58,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:15:58,485 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:15:58,488 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:15:58,488 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:15:58,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:15:58,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f0d48ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58, skipping insertion in model container [2023-12-05 21:15:58,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,530 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:15:58,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:15:58,789 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:15:58,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:15:58,859 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:15:58,859 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58 WrapperNode [2023-12-05 21:15:58,859 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:15:58,860 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:15:58,860 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:15:58,860 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:15:58,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,874 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,888 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-12-05 21:15:58,888 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:15:58,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:15:58,889 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:15:58,889 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:15:58,895 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,895 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,897 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,897 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,901 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:15:58,915 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:15:58,915 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:15:58,915 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:15:58,916 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (1/1) ... [2023-12-05 21:15:58,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:15:58,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:15:58,950 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 21:15:58,962 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 21:15:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:15:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:15:58,975 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:15:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:15:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:15:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:15:58,976 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:15:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:15:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:15:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:15:58,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:15:58,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:15:58,977 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 21:15:59,069 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:15:59,071 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:15:59,232 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:15:59,279 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:15:59,279 INFO L309 CfgBuilder]: Removed 9 assume(true) statements. [2023-12-05 21:15:59,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:15:59 BoogieIcfgContainer [2023-12-05 21:15:59,281 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:15:59,282 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:15:59,282 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:15:59,284 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:15:59,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:15:58" (1/3) ... [2023-12-05 21:15:59,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1611c699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:15:59, skipping insertion in model container [2023-12-05 21:15:59,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:15:58" (2/3) ... [2023-12-05 21:15:59,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1611c699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:15:59, skipping insertion in model container [2023-12-05 21:15:59,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:15:59" (3/3) ... [2023-12-05 21:15:59,286 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2023-12-05 21:15:59,297 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:15:59,298 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-12-05 21:15:59,298 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:15:59,355 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:15:59,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 124 transitions, 252 flow [2023-12-05 21:15:59,430 INFO L124 PetriNetUnfolderBase]: 16/169 cut-off events. [2023-12-05 21:15:59,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:15:59,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 169 events. 16/169 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 511 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-12-05 21:15:59,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 124 transitions, 252 flow [2023-12-05 21:15:59,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 116 places, 124 transitions, 252 flow [2023-12-05 21:15:59,456 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:15:59,461 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;@103e99f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:15:59,461 INFO L363 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-12-05 21:15:59,478 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:15:59,478 INFO L124 PetriNetUnfolderBase]: 1/38 cut-off events. [2023-12-05 21:15:59,478 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:15:59,478 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:15:59,479 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, 1, 1] [2023-12-05 21:15:59,480 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-05 21:15:59,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:15:59,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1723144213, now seen corresponding path program 1 times [2023-12-05 21:15:59,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:15:59,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508524507] [2023-12-05 21:15:59,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:15:59,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:15:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:15:59,744 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 21:15:59,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:15:59,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508524507] [2023-12-05 21:15:59,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508524507] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:15:59,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:15:59,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:15:59,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600991471] [2023-12-05 21:15:59,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:15:59,752 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:15:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:15:59,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:15:59,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:15:59,778 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 124 [2023-12-05 21:15:59,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 124 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 21:15:59,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:15:59,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 124 [2023-12-05 21:15:59,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:15:59,967 INFO L124 PetriNetUnfolderBase]: 154/657 cut-off events. [2023-12-05 21:15:59,967 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:15:59,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 657 events. 154/657 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4098 event pairs, 112 based on Foata normal form. 107/666 useless extension candidates. Maximal degree in co-relation 923. Up to 256 conditions per place. [2023-12-05 21:15:59,975 INFO L140 encePairwiseOnDemand]: 110/124 looper letters, 43 selfloop transitions, 2 changer transitions 3/123 dead transitions. [2023-12-05 21:15:59,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 123 transitions, 346 flow [2023-12-05 21:15:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:15:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:15:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-12-05 21:15:59,988 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7983870967741935 [2023-12-05 21:15:59,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-12-05 21:15:59,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-12-05 21:15:59,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:15:59,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-12-05 21:15:59,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 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 21:15:59,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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 21:15:59,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 124.0) internal successors, (496), 4 states have internal predecessors, (496), 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 21:16:00,001 INFO L308 CegarLoopForPetriNet]: 116 programPoint places, -2 predicate places. [2023-12-05 21:16:00,001 INFO L500 AbstractCegarLoop]: Abstraction has has 114 places, 123 transitions, 346 flow [2023-12-05 21:16:00,001 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 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 21:16:00,001 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:00,001 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, 1, 1] [2023-12-05 21:16:00,002 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:16:00,002 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-05 21:16:00,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1723144214, now seen corresponding path program 1 times [2023-12-05 21:16:00,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:00,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745634014] [2023-12-05 21:16:00,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:00,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:00,148 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 21:16:00,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:00,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745634014] [2023-12-05 21:16:00,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745634014] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:16:00,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:16:00,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:16:00,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316702926] [2023-12-05 21:16:00,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:16:00,151 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:16:00,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:00,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:16:00,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:16:00,154 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 124 [2023-12-05 21:16:00,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 123 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 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 21:16:00,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:00,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 124 [2023-12-05 21:16:00,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:00,409 INFO L124 PetriNetUnfolderBase]: 278/1025 cut-off events. [2023-12-05 21:16:00,410 INFO L125 PetriNetUnfolderBase]: For 238/254 co-relation queries the response was YES. [2023-12-05 21:16:00,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2021 conditions, 1025 events. 278/1025 cut-off events. For 238/254 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 6838 event pairs, 46 based on Foata normal form. 0/954 useless extension candidates. Maximal degree in co-relation 1945. Up to 420 conditions per place. [2023-12-05 21:16:00,414 INFO L140 encePairwiseOnDemand]: 118/124 looper letters, 69 selfloop transitions, 4 changer transitions 6/153 dead transitions. [2023-12-05 21:16:00,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 153 transitions, 606 flow [2023-12-05 21:16:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:16:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:16:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 359 transitions. [2023-12-05 21:16:00,417 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7237903225806451 [2023-12-05 21:16:00,417 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 359 transitions. [2023-12-05 21:16:00,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 359 transitions. [2023-12-05 21:16:00,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:00,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 359 transitions. [2023-12-05 21:16:00,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 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 21:16:00,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 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 21:16:00,420 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 124.0) internal successors, (620), 5 states have internal predecessors, (620), 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 21:16:00,421 INFO L308 CegarLoopForPetriNet]: 116 programPoint places, 1 predicate places. [2023-12-05 21:16:00,421 INFO L500 AbstractCegarLoop]: Abstraction has has 117 places, 153 transitions, 606 flow [2023-12-05 21:16:00,421 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 74.5) internal successors, (298), 4 states have internal predecessors, (298), 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 21:16:00,421 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:00,421 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:16:00,421 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:16:00,422 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-05 21:16:00,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:00,422 INFO L85 PathProgramCache]: Analyzing trace with hash 899892915, now seen corresponding path program 1 times [2023-12-05 21:16:00,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:00,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891732482] [2023-12-05 21:16:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:00,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:00,582 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 21:16:00,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:00,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891732482] [2023-12-05 21:16:00,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891732482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:16:00,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:16:00,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:16:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115492513] [2023-12-05 21:16:00,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:16:00,583 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:16:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:16:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:16:00,585 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 124 [2023-12-05 21:16:00,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 153 transitions, 606 flow. Second operand has 7 states, 7 states have (on average 70.28571428571429) internal successors, (492), 7 states have internal predecessors, (492), 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 21:16:00,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:00,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 124 [2023-12-05 21:16:00,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:00,750 INFO L124 PetriNetUnfolderBase]: 180/703 cut-off events. [2023-12-05 21:16:00,751 INFO L125 PetriNetUnfolderBase]: For 560/560 co-relation queries the response was YES. [2023-12-05 21:16:00,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1754 conditions, 703 events. 180/703 cut-off events. For 560/560 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 4144 event pairs, 10 based on Foata normal form. 136/804 useless extension candidates. Maximal degree in co-relation 1668. Up to 294 conditions per place. [2023-12-05 21:16:00,755 INFO L140 encePairwiseOnDemand]: 111/124 looper letters, 36 selfloop transitions, 4 changer transitions 42/133 dead transitions. [2023-12-05 21:16:00,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 133 transitions, 658 flow [2023-12-05 21:16:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:16:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:16:00,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 469 transitions. [2023-12-05 21:16:00,760 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6303763440860215 [2023-12-05 21:16:00,760 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 469 transitions. [2023-12-05 21:16:00,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 469 transitions. [2023-12-05 21:16:00,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:00,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 469 transitions. [2023-12-05 21:16:00,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 78.16666666666667) internal successors, (469), 6 states have internal predecessors, (469), 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 21:16:00,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 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 21:16:00,763 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 124.0) internal successors, (868), 7 states have internal predecessors, (868), 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 21:16:00,765 INFO L308 CegarLoopForPetriNet]: 116 programPoint places, -2 predicate places. [2023-12-05 21:16:00,765 INFO L500 AbstractCegarLoop]: Abstraction has has 114 places, 133 transitions, 658 flow [2023-12-05 21:16:00,765 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.28571428571429) internal successors, (492), 7 states have internal predecessors, (492), 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 21:16:00,765 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:00,765 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:16:00,765 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:16:00,766 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-05 21:16:00,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash 952224564, now seen corresponding path program 1 times [2023-12-05 21:16:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:00,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877056373] [2023-12-05 21:16:00,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:00,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:16:00,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:00,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877056373] [2023-12-05 21:16:00,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877056373] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:16:00,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893232735] [2023-12-05 21:16:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:00,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:16:00,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:16:00,956 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:16:00,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:16:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:01,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-05 21:16:01,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:16:01,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:16:01,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:16:01,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:16:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:16:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893232735] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:16:01,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:16:01,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-12-05 21:16:01,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196579339] [2023-12-05 21:16:01,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:16:01,371 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-05 21:16:01,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-05 21:16:01,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-05 21:16:01,375 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 124 [2023-12-05 21:16:01,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 133 transitions, 658 flow. Second operand has 14 states, 14 states have (on average 73.57142857142857) internal successors, (1030), 14 states have internal predecessors, (1030), 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 21:16:01,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:01,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 124 [2023-12-05 21:16:01,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:01,539 INFO L124 PetriNetUnfolderBase]: 50/206 cut-off events. [2023-12-05 21:16:01,539 INFO L125 PetriNetUnfolderBase]: For 316/318 co-relation queries the response was YES. [2023-12-05 21:16:01,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 206 events. 50/206 cut-off events. For 316/318 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 681 event pairs, 0 based on Foata normal form. 0/206 useless extension candidates. Maximal degree in co-relation 522. Up to 74 conditions per place. [2023-12-05 21:16:01,541 INFO L140 encePairwiseOnDemand]: 117/124 looper letters, 51 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2023-12-05 21:16:01,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 638 flow [2023-12-05 21:16:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:16:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:16:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 555 transitions. [2023-12-05 21:16:01,543 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6394009216589862 [2023-12-05 21:16:01,543 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 555 transitions. [2023-12-05 21:16:01,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 555 transitions. [2023-12-05 21:16:01,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:01,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 555 transitions. [2023-12-05 21:16:01,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 79.28571428571429) internal successors, (555), 7 states have internal predecessors, (555), 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 21:16:01,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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 21:16:01,547 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 124.0) internal successors, (992), 8 states have internal predecessors, (992), 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 21:16:01,549 INFO L308 CegarLoopForPetriNet]: 116 programPoint places, -28 predicate places. [2023-12-05 21:16:01,549 INFO L500 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 638 flow [2023-12-05 21:16:01,549 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.57142857142857) internal successors, (1030), 14 states have internal predecessors, (1030), 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 21:16:01,549 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:01,550 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:16:01,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-05 21:16:01,755 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:16:01,755 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-12-05 21:16:01,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:01,756 INFO L85 PathProgramCache]: Analyzing trace with hash -545809272, now seen corresponding path program 1 times [2023-12-05 21:16:01,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:01,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701271208] [2023-12-05 21:16:01,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:01,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:16:01,770 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:16:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:16:01,805 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:16:01,805 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:16:01,806 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 21 remaining) [2023-12-05 21:16:01,807 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2023-12-05 21:16:01,808 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2023-12-05 21:16:01,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2023-12-05 21:16:01,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 21 remaining) [2023-12-05 21:16:01,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 21 remaining) [2023-12-05 21:16:01,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 21 remaining) [2023-12-05 21:16:01,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 21 remaining) [2023-12-05 21:16:01,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 21 remaining) [2023-12-05 21:16:01,809 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 21 remaining) [2023-12-05 21:16:01,811 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 21 remaining) [2023-12-05 21:16:01,812 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 21 remaining) [2023-12-05 21:16:01,812 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 21 remaining) [2023-12-05 21:16:01,812 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:16:01,812 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:16:01,814 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:16:01,814 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:16:01,847 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:16:01,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 168 transitions, 346 flow [2023-12-05 21:16:01,870 INFO L124 PetriNetUnfolderBase]: 27/263 cut-off events. [2023-12-05 21:16:01,870 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:16:01,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 263 events. 27/263 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 951 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 170. Up to 6 conditions per place. [2023-12-05 21:16:01,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 168 transitions, 346 flow [2023-12-05 21:16:01,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 168 transitions, 346 flow [2023-12-05 21:16:01,875 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:16:01,875 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;@103e99f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:16:01,875 INFO L363 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2023-12-05 21:16:01,878 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:16:01,878 INFO L124 PetriNetUnfolderBase]: 1/38 cut-off events. [2023-12-05 21:16:01,878 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:16:01,878 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:01,878 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, 1, 1] [2023-12-05 21:16:01,878 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-05 21:16:01,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash -265041731, now seen corresponding path program 1 times [2023-12-05 21:16:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:01,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635260364] [2023-12-05 21:16:01,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:01,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:01,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:01,915 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 21:16:01,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:01,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635260364] [2023-12-05 21:16:01,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635260364] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:16:01,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:16:01,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:16:01,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940748072] [2023-12-05 21:16:01,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:16:01,916 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:16:01,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:16:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:16:01,917 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 168 [2023-12-05 21:16:01,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 168 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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 21:16:01,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:01,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 168 [2023-12-05 21:16:01,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:03,003 INFO L124 PetriNetUnfolderBase]: 4984/12056 cut-off events. [2023-12-05 21:16:03,003 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-12-05 21:16:03,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19990 conditions, 12056 events. 4984/12056 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 121314 event pairs, 3682 based on Foata normal form. 2383/12233 useless extension candidates. Maximal degree in co-relation 1645. Up to 5851 conditions per place. [2023-12-05 21:16:03,084 INFO L140 encePairwiseOnDemand]: 148/168 looper letters, 75 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2023-12-05 21:16:03,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 175 transitions, 514 flow [2023-12-05 21:16:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:16:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:16:03,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-12-05 21:16:03,086 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8075396825396826 [2023-12-05 21:16:03,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-12-05 21:16:03,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-12-05 21:16:03,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:03,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-12-05 21:16:03,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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 21:16:03,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 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 21:16:03,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 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 21:16:03,090 INFO L308 CegarLoopForPetriNet]: 156 programPoint places, -2 predicate places. [2023-12-05 21:16:03,090 INFO L500 AbstractCegarLoop]: Abstraction has has 154 places, 175 transitions, 514 flow [2023-12-05 21:16:03,090 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 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 21:16:03,090 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:03,090 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, 1, 1] [2023-12-05 21:16:03,091 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:16:03,091 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-05 21:16:03,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:03,092 INFO L85 PathProgramCache]: Analyzing trace with hash -265041730, now seen corresponding path program 1 times [2023-12-05 21:16:03,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:03,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040162268] [2023-12-05 21:16:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:03,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:03,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:03,155 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 21:16:03,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:03,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040162268] [2023-12-05 21:16:03,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040162268] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:16:03,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:16:03,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:16:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310373521] [2023-12-05 21:16:03,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:16:03,156 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:16:03,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:03,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:16:03,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:16:03,158 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 168 [2023-12-05 21:16:03,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 175 transitions, 514 flow. Second operand has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 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 21:16:03,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:03,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 168 [2023-12-05 21:16:03,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:05,506 INFO L124 PetriNetUnfolderBase]: 11438/25876 cut-off events. [2023-12-05 21:16:05,506 INFO L125 PetriNetUnfolderBase]: For 7032/7476 co-relation queries the response was YES. [2023-12-05 21:16:05,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55579 conditions, 25876 events. 11438/25876 cut-off events. For 7032/7476 co-relation queries the response was YES. Maximal size of possible extension queue 785. Compared 271488 event pairs, 5328 based on Foata normal form. 0/23730 useless extension candidates. Maximal degree in co-relation 6121. Up to 13823 conditions per place. [2023-12-05 21:16:05,679 INFO L140 encePairwiseOnDemand]: 162/168 looper letters, 116 selfloop transitions, 4 changer transitions 0/221 dead transitions. [2023-12-05 21:16:05,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 221 transitions, 908 flow [2023-12-05 21:16:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:16:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:16:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2023-12-05 21:16:05,680 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7172619047619048 [2023-12-05 21:16:05,681 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2023-12-05 21:16:05,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2023-12-05 21:16:05,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:05,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2023-12-05 21:16:05,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 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 21:16:05,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 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 21:16:05,683 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 168.0) internal successors, (840), 5 states have internal predecessors, (840), 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 21:16:05,683 INFO L308 CegarLoopForPetriNet]: 156 programPoint places, 1 predicate places. [2023-12-05 21:16:05,683 INFO L500 AbstractCegarLoop]: Abstraction has has 157 places, 221 transitions, 908 flow [2023-12-05 21:16:05,683 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 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 21:16:05,684 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:05,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:16:05,684 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:16:05,684 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-05 21:16:05,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:05,684 INFO L85 PathProgramCache]: Analyzing trace with hash 944123087, now seen corresponding path program 1 times [2023-12-05 21:16:05,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:05,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411428216] [2023-12-05 21:16:05,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:05,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:05,759 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 21:16:05,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:05,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411428216] [2023-12-05 21:16:05,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411428216] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:16:05,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:16:05,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:16:05,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974787967] [2023-12-05 21:16:05,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:16:05,760 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:16:05,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:16:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:16:05,761 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 168 [2023-12-05 21:16:05,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 221 transitions, 908 flow. Second operand has 7 states, 7 states have (on average 90.28571428571429) internal successors, (632), 7 states have internal predecessors, (632), 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 21:16:05,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:05,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 168 [2023-12-05 21:16:05,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:07,916 INFO L124 PetriNetUnfolderBase]: 9812/23268 cut-off events. [2023-12-05 21:16:07,916 INFO L125 PetriNetUnfolderBase]: For 17232/17232 co-relation queries the response was YES. [2023-12-05 21:16:07,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63563 conditions, 23268 events. 9812/23268 cut-off events. For 17232/17232 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 242168 event pairs, 3180 based on Foata normal form. 1777/24097 useless extension candidates. Maximal degree in co-relation 6884. Up to 11301 conditions per place. [2023-12-05 21:16:08,079 INFO L140 encePairwiseOnDemand]: 147/168 looper letters, 176 selfloop transitions, 22 changer transitions 0/287 dead transitions. [2023-12-05 21:16:08,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 287 transitions, 1652 flow [2023-12-05 21:16:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:16:08,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:16:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 911 transitions. [2023-12-05 21:16:08,082 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6778273809523809 [2023-12-05 21:16:08,082 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 911 transitions. [2023-12-05 21:16:08,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 911 transitions. [2023-12-05 21:16:08,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:08,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 911 transitions. [2023-12-05 21:16:08,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.875) internal successors, (911), 8 states have internal predecessors, (911), 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 21:16:08,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 168.0) internal successors, (1512), 9 states have internal predecessors, (1512), 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 21:16:08,087 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 168.0) internal successors, (1512), 9 states have internal predecessors, (1512), 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 21:16:08,088 INFO L308 CegarLoopForPetriNet]: 156 programPoint places, 8 predicate places. [2023-12-05 21:16:08,088 INFO L500 AbstractCegarLoop]: Abstraction has has 164 places, 287 transitions, 1652 flow [2023-12-05 21:16:08,088 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.28571428571429) internal successors, (632), 7 states have internal predecessors, (632), 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 21:16:08,088 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:08,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:16:08,089 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:16:08,089 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-05 21:16:08,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash 944123088, now seen corresponding path program 1 times [2023-12-05 21:16:08,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:08,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949957514] [2023-12-05 21:16:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:08,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:08,238 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 21:16:08,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:08,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949957514] [2023-12-05 21:16:08,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949957514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:16:08,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:16:08,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:16:08,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89666454] [2023-12-05 21:16:08,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:16:08,239 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:16:08,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:08,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:16:08,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:16:08,240 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 168 [2023-12-05 21:16:08,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 287 transitions, 1652 flow. Second operand has 7 states, 7 states have (on average 89.28571428571429) internal successors, (625), 7 states have internal predecessors, (625), 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 21:16:08,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:08,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 168 [2023-12-05 21:16:08,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:09,408 INFO L124 PetriNetUnfolderBase]: 4757/11736 cut-off events. [2023-12-05 21:16:09,409 INFO L125 PetriNetUnfolderBase]: For 18816/18816 co-relation queries the response was YES. [2023-12-05 21:16:09,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39681 conditions, 11736 events. 4757/11736 cut-off events. For 18816/18816 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 111054 event pairs, 1660 based on Foata normal form. 2235/13451 useless extension candidates. Maximal degree in co-relation 4246. Up to 5948 conditions per place. [2023-12-05 21:16:09,485 INFO L140 encePairwiseOnDemand]: 147/168 looper letters, 47 selfloop transitions, 4 changer transitions 104/227 dead transitions. [2023-12-05 21:16:09,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 227 transitions, 1570 flow [2023-12-05 21:16:09,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:16:09,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:16:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 620 transitions. [2023-12-05 21:16:09,487 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2023-12-05 21:16:09,487 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 620 transitions. [2023-12-05 21:16:09,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 620 transitions. [2023-12-05 21:16:09,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:09,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 620 transitions. [2023-12-05 21:16:09,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.33333333333333) internal successors, (620), 6 states have internal predecessors, (620), 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 21:16:09,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 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 21:16:09,490 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 168.0) internal successors, (1176), 7 states have internal predecessors, (1176), 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 21:16:09,490 INFO L308 CegarLoopForPetriNet]: 156 programPoint places, -3 predicate places. [2023-12-05 21:16:09,491 INFO L500 AbstractCegarLoop]: Abstraction has has 153 places, 227 transitions, 1570 flow [2023-12-05 21:16:09,491 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 89.28571428571429) internal successors, (625), 7 states have internal predecessors, (625), 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 21:16:09,491 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:09,491 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:16:09,491 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:16:09,491 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-05 21:16:09,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:09,491 INFO L85 PathProgramCache]: Analyzing trace with hash 507753233, now seen corresponding path program 1 times [2023-12-05 21:16:09,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:09,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897975057] [2023-12-05 21:16:09,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:16:09,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897975057] [2023-12-05 21:16:09,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897975057] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:16:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173819435] [2023-12-05 21:16:09,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:09,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:16:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:16:09,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:16:09,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:16:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:09,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-05 21:16:09,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:16:09,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:16:09,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:16:09,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:16:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:16:10,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173819435] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:16:10,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:16:10,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-12-05 21:16:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606919890] [2023-12-05 21:16:10,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:16:10,007 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-05 21:16:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-05 21:16:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-05 21:16:10,009 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 168 [2023-12-05 21:16:10,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 227 transitions, 1570 flow. Second operand has 14 states, 14 states have (on average 96.57142857142857) internal successors, (1352), 14 states have internal predecessors, (1352), 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 21:16:10,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:10,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 168 [2023-12-05 21:16:10,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:10,452 INFO L124 PetriNetUnfolderBase]: 1260/2755 cut-off events. [2023-12-05 21:16:10,452 INFO L125 PetriNetUnfolderBase]: For 9153/9179 co-relation queries the response was YES. [2023-12-05 21:16:10,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11395 conditions, 2755 events. 1260/2755 cut-off events. For 9153/9179 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 18868 event pairs, 0 based on Foata normal form. 0/2754 useless extension candidates. Maximal degree in co-relation 992. Up to 1889 conditions per place. [2023-12-05 21:16:10,472 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 124 selfloop transitions, 8 changer transitions 0/196 dead transitions. [2023-12-05 21:16:10,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 1676 flow [2023-12-05 21:16:10,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-05 21:16:10,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-12-05 21:16:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1076 transitions. [2023-12-05 21:16:10,475 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6404761904761904 [2023-12-05 21:16:10,475 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1076 transitions. [2023-12-05 21:16:10,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1076 transitions. [2023-12-05 21:16:10,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:10,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1076 transitions. [2023-12-05 21:16:10,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 107.6) internal successors, (1076), 10 states have internal predecessors, (1076), 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 21:16:10,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 168.0) internal successors, (1848), 11 states have internal predecessors, (1848), 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 21:16:10,480 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 168.0) internal successors, (1848), 11 states have internal predecessors, (1848), 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 21:16:10,480 INFO L308 CegarLoopForPetriNet]: 156 programPoint places, -29 predicate places. [2023-12-05 21:16:10,480 INFO L500 AbstractCegarLoop]: Abstraction has has 127 places, 196 transitions, 1676 flow [2023-12-05 21:16:10,481 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 96.57142857142857) internal successors, (1352), 14 states have internal predecessors, (1352), 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 21:16:10,481 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:10,481 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:16:10,500 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-05 21:16:10,701 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-05 21:16:10,701 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-05 21:16:10,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash -513157204, now seen corresponding path program 1 times [2023-12-05 21:16:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:10,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019296878] [2023-12-05 21:16:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:16:10,717 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:16:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:16:10,727 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:16:10,727 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 29 remaining) [2023-12-05 21:16:10,728 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 29 remaining) [2023-12-05 21:16:10,729 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 29 remaining) [2023-12-05 21:16:10,729 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:16:10,729 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-12-05 21:16:10,730 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:16:10,730 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:16:10,744 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:16:10,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 212 transitions, 442 flow [2023-12-05 21:16:10,764 INFO L124 PetriNetUnfolderBase]: 38/357 cut-off events. [2023-12-05 21:16:10,765 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:16:10,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 357 events. 38/357 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1392 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 267. Up to 8 conditions per place. [2023-12-05 21:16:10,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 212 transitions, 442 flow [2023-12-05 21:16:10,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 212 transitions, 442 flow [2023-12-05 21:16:10,769 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:16:10,770 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;@103e99f3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:16:10,770 INFO L363 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-12-05 21:16:10,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:16:10,771 INFO L124 PetriNetUnfolderBase]: 1/38 cut-off events. [2023-12-05 21:16:10,771 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:16:10,771 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:10,771 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, 1, 1] [2023-12-05 21:16:10,771 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-05 21:16:10,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:10,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1827807633, now seen corresponding path program 1 times [2023-12-05 21:16:10,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:10,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205373736] [2023-12-05 21:16:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:10,791 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 21:16:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205373736] [2023-12-05 21:16:10,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205373736] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:16:10,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:16:10,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:16:10,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676201007] [2023-12-05 21:16:10,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:16:10,791 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:16:10,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:10,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:16:10,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:16:10,792 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 212 [2023-12-05 21:16:10,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 212 transitions, 442 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 21:16:10,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:10,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 212 [2023-12-05 21:16:10,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:16:31,143 INFO L124 PetriNetUnfolderBase]: 115234/220841 cut-off events. [2023-12-05 21:16:31,143 INFO L125 PetriNetUnfolderBase]: For 2023/2023 co-relation queries the response was YES. [2023-12-05 21:16:31,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380426 conditions, 220841 events. 115234/220841 cut-off events. For 2023/2023 co-relation queries the response was YES. Maximal size of possible extension queue 6199. Compared 2687499 event pairs, 85582 based on Foata normal form. 47338/224003 useless extension candidates. Maximal degree in co-relation 19971. Up to 118126 conditions per place. [2023-12-05 21:16:33,207 INFO L140 encePairwiseOnDemand]: 186/212 looper letters, 104 selfloop transitions, 2 changer transitions 0/227 dead transitions. [2023-12-05 21:16:33,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 227 transitions, 684 flow [2023-12-05 21:16:33,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:16:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:16:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-12-05 21:16:33,208 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8128930817610063 [2023-12-05 21:16:33,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-12-05 21:16:33,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-12-05 21:16:33,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:16:33,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-12-05 21:16:33,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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 21:16:33,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 21:16:33,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 212.0) internal successors, (848), 4 states have internal predecessors, (848), 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 21:16:33,219 INFO L308 CegarLoopForPetriNet]: 196 programPoint places, -2 predicate places. [2023-12-05 21:16:33,219 INFO L500 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 684 flow [2023-12-05 21:16:33,219 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 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 21:16:33,219 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:16:33,219 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, 1, 1] [2023-12-05 21:16:33,219 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:16:33,219 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-12-05 21:16:33,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:16:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1827807634, now seen corresponding path program 1 times [2023-12-05 21:16:33,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:16:33,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29066649] [2023-12-05 21:16:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:16:33,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:16:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:16:33,259 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 21:16:33,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:16:33,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29066649] [2023-12-05 21:16:33,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29066649] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:16:33,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:16:33,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:16:33,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582598036] [2023-12-05 21:16:33,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:16:33,260 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:16:33,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:16:33,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:16:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:16:33,260 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 212 [2023-12-05 21:16:33,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 227 transitions, 684 flow. Second operand has 4 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 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 21:16:33,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:16:33,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 212 [2023-12-05 21:16:33,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand