/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_76-tricky_address3_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:17:23,932 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:17:23,993 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 21:17:24,025 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:17:24,026 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:17:24,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:17:24,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:17:24,027 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:17:24,028 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:17:24,031 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:17:24,031 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:17:24,032 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:17:24,032 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:17:24,033 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:17:24,033 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:17:24,033 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:17:24,033 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:17:24,033 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:17:24,034 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:17:24,034 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:17:24,034 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:17:24,034 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:17:24,035 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:17:24,035 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:17:24,035 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:17:24,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:24,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:17:24,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:17:24,036 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:17:24,036 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:17:24,036 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:17:24,037 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:17:24,037 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:17:24,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:17:24,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:17:24,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:17:24,249 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:17:24,249 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:17:24,250 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:17:24,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-12-05 21:17:25,336 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:17:25,559 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:17:25,560 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-12-05 21:17:25,574 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3a6a6299/42fcfd7360ec467b8eef50095c10898d/FLAG841891abf [2023-12-05 21:17:25,584 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3a6a6299/42fcfd7360ec467b8eef50095c10898d [2023-12-05 21:17:25,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:17:25,587 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:17:25,588 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:25,588 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:17:25,596 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:17:25,596 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:25" (1/1) ... [2023-12-05 21:17:25,597 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a13b22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:25, skipping insertion in model container [2023-12-05 21:17:25,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:25" (1/1) ... [2023-12-05 21:17:25,651 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:17:26,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:26,044 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:17:26,074 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:26,122 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:17:26,122 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26 WrapperNode [2023-12-05 21:17:26,123 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:26,123 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:26,124 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:17:26,124 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:17:26,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,154 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,173 INFO L138 Inliner]: procedures = 271, calls = 50, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 225 [2023-12-05 21:17:26,174 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:26,174 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:17:26,174 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:17:26,175 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:17:26,181 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,184 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,184 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,190 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,197 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:17:26,198 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:17:26,198 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:17:26,198 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:17:26,199 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (1/1) ... [2023-12-05 21:17:26,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:26,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:26,225 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 21:17:26,244 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 21:17:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:17:26,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:17:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:17:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:17:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:17:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:17:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:17:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:17:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:17:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:17:26,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:17:26,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:17:26,260 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 21:17:26,358 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:17:26,360 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:17:26,605 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:17:26,650 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:17:26,651 INFO L309 CfgBuilder]: Removed 23 assume(true) statements. [2023-12-05 21:17:26,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:26 BoogieIcfgContainer [2023-12-05 21:17:26,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:17:26,654 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:17:26,654 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:17:26,656 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:17:26,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:17:25" (1/3) ... [2023-12-05 21:17:26,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52014f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:26, skipping insertion in model container [2023-12-05 21:17:26,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:26" (2/3) ... [2023-12-05 21:17:26,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52014f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:26, skipping insertion in model container [2023-12-05 21:17:26,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:26" (3/3) ... [2023-12-05 21:17:26,658 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-12-05 21:17:26,671 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:17:26,671 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-12-05 21:17:26,671 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:17:26,721 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-05 21:17:26,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 243 transitions, 493 flow [2023-12-05 21:17:26,838 INFO L124 PetriNetUnfolderBase]: 48/340 cut-off events. [2023-12-05 21:17:26,838 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:17:26,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 340 events. 48/340 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1287 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 195. Up to 8 conditions per place. [2023-12-05 21:17:26,847 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 243 transitions, 493 flow [2023-12-05 21:17:26,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 243 transitions, 493 flow [2023-12-05 21:17:26,868 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:26,873 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;@2193161d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:26,873 INFO L363 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-12-05 21:17:26,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:26,879 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:17:26,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:26,879 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:26,880 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] [2023-12-05 21:17:26,880 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:26,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:26,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1179259309, now seen corresponding path program 1 times [2023-12-05 21:17:26,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:26,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858522158] [2023-12-05 21:17:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:27,164 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 21:17:27,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:27,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858522158] [2023-12-05 21:17:27,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858522158] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:27,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:27,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820274868] [2023-12-05 21:17:27,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:27,172 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:27,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:27,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:27,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:27,194 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 243 [2023-12-05 21:17:27,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 243 transitions, 493 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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 21:17:27,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:27,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 243 [2023-12-05 21:17:27,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:27,367 INFO L124 PetriNetUnfolderBase]: 85/940 cut-off events. [2023-12-05 21:17:27,367 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-12-05 21:17:27,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1130 conditions, 940 events. 85/940 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 6312 event pairs, 72 based on Foata normal form. 208/973 useless extension candidates. Maximal degree in co-relation 971. Up to 181 conditions per place. [2023-12-05 21:17:27,378 INFO L140 encePairwiseOnDemand]: 211/243 looper letters, 29 selfloop transitions, 2 changer transitions 1/212 dead transitions. [2023-12-05 21:17:27,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 212 transitions, 493 flow [2023-12-05 21:17:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2023-12-05 21:17:27,393 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8463648834019204 [2023-12-05 21:17:27,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2023-12-05 21:17:27,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2023-12-05 21:17:27,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:27,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2023-12-05 21:17:27,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 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 21:17:27,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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 21:17:27,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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 21:17:27,408 INFO L308 CegarLoopForPetriNet]: 213 programPoint places, -4 predicate places. [2023-12-05 21:17:27,408 INFO L500 AbstractCegarLoop]: Abstraction has has 209 places, 212 transitions, 493 flow [2023-12-05 21:17:27,408 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 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 21:17:27,408 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:27,409 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, 1] [2023-12-05 21:17:27,409 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:17:27,409 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:27,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash -880733824, now seen corresponding path program 1 times [2023-12-05 21:17:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:27,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157729728] [2023-12-05 21:17:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:27,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:27,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:27,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157729728] [2023-12-05 21:17:27,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157729728] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:27,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909588540] [2023-12-05 21:17:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:27,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:27,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:27,519 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 21:17:27,556 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 21:17:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:27,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:27,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:27,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909588540] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:27,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:27,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:27,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219211864] [2023-12-05 21:17:27,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:27,723 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:27,728 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 243 [2023-12-05 21:17:27,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 212 transitions, 493 flow. Second operand has 10 states, 10 states have (on average 186.1) internal successors, (1861), 10 states have internal predecessors, (1861), 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 21:17:27,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:27,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 243 [2023-12-05 21:17:27,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:27,922 INFO L124 PetriNetUnfolderBase]: 85/947 cut-off events. [2023-12-05 21:17:27,922 INFO L125 PetriNetUnfolderBase]: For 104/112 co-relation queries the response was YES. [2023-12-05 21:17:27,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 947 events. 85/947 cut-off events. For 104/112 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 6343 event pairs, 72 based on Foata normal form. 0/772 useless extension candidates. Maximal degree in co-relation 1132. Up to 186 conditions per place. [2023-12-05 21:17:27,929 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 30 selfloop transitions, 9 changer transitions 1/219 dead transitions. [2023-12-05 21:17:27,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 219 transitions, 595 flow [2023-12-05 21:17:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:27,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1697 transitions. [2023-12-05 21:17:27,932 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7759487882944673 [2023-12-05 21:17:27,932 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1697 transitions. [2023-12-05 21:17:27,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1697 transitions. [2023-12-05 21:17:27,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:27,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1697 transitions. [2023-12-05 21:17:27,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 188.55555555555554) internal successors, (1697), 9 states have internal predecessors, (1697), 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 21:17:27,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 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 21:17:27,942 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 243.0) internal successors, (2430), 10 states have internal predecessors, (2430), 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 21:17:27,943 INFO L308 CegarLoopForPetriNet]: 213 programPoint places, 4 predicate places. [2023-12-05 21:17:27,943 INFO L500 AbstractCegarLoop]: Abstraction has has 217 places, 219 transitions, 595 flow [2023-12-05 21:17:27,944 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 186.1) internal successors, (1861), 10 states have internal predecessors, (1861), 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 21:17:27,945 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:27,945 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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 21:17:27,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:28,150 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:28,151 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:28,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:28,151 INFO L85 PathProgramCache]: Analyzing trace with hash 665629024, now seen corresponding path program 2 times [2023-12-05 21:17:28,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:28,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853739715] [2023-12-05 21:17:28,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853739715] [2023-12-05 21:17:28,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853739715] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:28,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:28,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:28,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894629473] [2023-12-05 21:17:28,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:28,266 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:28,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:28,267 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 243 [2023-12-05 21:17:28,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 219 transitions, 595 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 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 21:17:28,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:28,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 243 [2023-12-05 21:17:28,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:28,542 INFO L124 PetriNetUnfolderBase]: 473/2077 cut-off events. [2023-12-05 21:17:28,543 INFO L125 PetriNetUnfolderBase]: For 945/965 co-relation queries the response was YES. [2023-12-05 21:17:28,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 2077 events. 473/2077 cut-off events. For 945/965 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 17883 event pairs, 396 based on Foata normal form. 0/1733 useless extension candidates. Maximal degree in co-relation 3625. Up to 857 conditions per place. [2023-12-05 21:17:28,554 INFO L140 encePairwiseOnDemand]: 239/243 looper letters, 65 selfloop transitions, 2 changer transitions 4/235 dead transitions. [2023-12-05 21:17:28,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 235 transitions, 799 flow [2023-12-05 21:17:28,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 546 transitions. [2023-12-05 21:17:28,556 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7489711934156379 [2023-12-05 21:17:28,556 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 546 transitions. [2023-12-05 21:17:28,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 546 transitions. [2023-12-05 21:17:28,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:28,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 546 transitions. [2023-12-05 21:17:28,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.0) internal successors, (546), 3 states have internal predecessors, (546), 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 21:17:28,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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 21:17:28,559 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 243.0) internal successors, (972), 4 states have internal predecessors, (972), 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 21:17:28,560 INFO L308 CegarLoopForPetriNet]: 213 programPoint places, 4 predicate places. [2023-12-05 21:17:28,560 INFO L500 AbstractCegarLoop]: Abstraction has has 217 places, 235 transitions, 799 flow [2023-12-05 21:17:28,561 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 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 21:17:28,561 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:28,561 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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 21:17:28,561 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:17:28,561 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:28,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:28,562 INFO L85 PathProgramCache]: Analyzing trace with hash 665629025, now seen corresponding path program 1 times [2023-12-05 21:17:28,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:28,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874555746] [2023-12-05 21:17:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874555746] [2023-12-05 21:17:28,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874555746] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920583685] [2023-12-05 21:17:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:28,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:28,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:28,688 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 21:17:28,709 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 21:17:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:28,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:28,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:28,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920583685] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:28,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:28,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:28,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593193001] [2023-12-05 21:17:28,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:28,861 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:28,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:28,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:28,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:28,865 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 243 [2023-12-05 21:17:28,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 235 transitions, 799 flow. Second operand has 18 states, 18 states have (on average 186.27777777777777) internal successors, (3353), 18 states have internal predecessors, (3353), 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 21:17:28,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:28,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 243 [2023-12-05 21:17:28,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:29,271 INFO L124 PetriNetUnfolderBase]: 473/2097 cut-off events. [2023-12-05 21:17:29,272 INFO L125 PetriNetUnfolderBase]: For 1888/1918 co-relation queries the response was YES. [2023-12-05 21:17:29,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4366 conditions, 2097 events. 473/2097 cut-off events. For 1888/1918 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 17872 event pairs, 396 based on Foata normal form. 0/1753 useless extension candidates. Maximal degree in co-relation 4004. Up to 857 conditions per place. [2023-12-05 21:17:29,284 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 44 selfloop transitions, 21 changer transitions 4/255 dead transitions. [2023-12-05 21:17:29,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 255 transitions, 1045 flow [2023-12-05 21:17:29,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:29,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3927 transitions. [2023-12-05 21:17:29,291 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7695473251028807 [2023-12-05 21:17:29,291 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3927 transitions. [2023-12-05 21:17:29,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3927 transitions. [2023-12-05 21:17:29,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:29,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3927 transitions. [2023-12-05 21:17:29,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 187.0) internal successors, (3927), 21 states have internal predecessors, (3927), 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 21:17:29,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 243.0) internal successors, (5346), 22 states have internal predecessors, (5346), 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 21:17:29,310 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 243.0) internal successors, (5346), 22 states have internal predecessors, (5346), 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 21:17:29,312 INFO L308 CegarLoopForPetriNet]: 213 programPoint places, 24 predicate places. [2023-12-05 21:17:29,312 INFO L500 AbstractCegarLoop]: Abstraction has has 237 places, 255 transitions, 1045 flow [2023-12-05 21:17:29,313 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 186.27777777777777) internal successors, (3353), 18 states have internal predecessors, (3353), 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 21:17:29,313 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:29,313 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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 21:17:29,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:29,518 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,SelfDestructingSolverStorable3 [2023-12-05 21:17:29,520 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:29,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:29,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2083973409, now seen corresponding path program 2 times [2023-12-05 21:17:29,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:29,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975235355] [2023-12-05 21:17:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:29,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:29,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:29,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975235355] [2023-12-05 21:17:29,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975235355] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:29,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771042678] [2023-12-05 21:17:29,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:29,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:29,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:29,806 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:29,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:17:29,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:17:29,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:29,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-05 21:17:29,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:30,030 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 21:17:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:30,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:30,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771042678] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:30,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:30,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2023-12-05 21:17:30,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609106112] [2023-12-05 21:17:30,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:30,101 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:30,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:30,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:30,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-12-05 21:17:30,109 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 243 [2023-12-05 21:17:30,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 255 transitions, 1045 flow. Second operand has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 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 21:17:30,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:30,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 243 [2023-12-05 21:17:30,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:30,496 INFO L124 PetriNetUnfolderBase]: 752/2621 cut-off events. [2023-12-05 21:17:30,496 INFO L125 PetriNetUnfolderBase]: For 4235/4450 co-relation queries the response was YES. [2023-12-05 21:17:30,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6792 conditions, 2621 events. 752/2621 cut-off events. For 4235/4450 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 22730 event pairs, 648 based on Foata normal form. 0/2406 useless extension candidates. Maximal degree in co-relation 6519. Up to 1159 conditions per place. [2023-12-05 21:17:30,509 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 98 selfloop transitions, 4 changer transitions 7/293 dead transitions. [2023-12-05 21:17:30,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 293 transitions, 1487 flow [2023-12-05 21:17:30,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 709 transitions. [2023-12-05 21:17:30,519 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7294238683127572 [2023-12-05 21:17:30,519 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 709 transitions. [2023-12-05 21:17:30,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 709 transitions. [2023-12-05 21:17:30,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:30,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 709 transitions. [2023-12-05 21:17:30,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 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 21:17:30,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 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 21:17:30,522 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 243.0) internal successors, (1215), 5 states have internal predecessors, (1215), 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 21:17:30,523 INFO L308 CegarLoopForPetriNet]: 213 programPoint places, 27 predicate places. [2023-12-05 21:17:30,523 INFO L500 AbstractCegarLoop]: Abstraction has has 240 places, 293 transitions, 1487 flow [2023-12-05 21:17:30,523 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 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 21:17:30,523 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:30,524 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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, 1, 1, 1, 1] [2023-12-05 21:17:30,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-05 21:17:30,732 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:30,732 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:30,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:30,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1307259334, now seen corresponding path program 1 times [2023-12-05 21:17:30,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18757212] [2023-12-05 21:17:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:30,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18757212] [2023-12-05 21:17:30,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18757212] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280864260] [2023-12-05 21:17:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:30,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:30,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:30,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:30,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-05 21:17:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:31,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:31,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:31,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:31,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280864260] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:31,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:31,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:31,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514417924] [2023-12-05 21:17:31,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:31,256 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:31,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:31,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:31,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:31,260 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 243 [2023-12-05 21:17:31,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 293 transitions, 1487 flow. Second operand has 23 states, 23 states have (on average 186.47826086956522) internal successors, (4289), 23 states have internal predecessors, (4289), 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 21:17:31,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:31,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 243 [2023-12-05 21:17:31,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:31,806 INFO L124 PetriNetUnfolderBase]: 751/2612 cut-off events. [2023-12-05 21:17:31,806 INFO L125 PetriNetUnfolderBase]: For 6274/6485 co-relation queries the response was YES. [2023-12-05 21:17:31,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7383 conditions, 2612 events. 751/2612 cut-off events. For 6274/6485 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 22688 event pairs, 188 based on Foata normal form. 0/2410 useless extension candidates. Maximal degree in co-relation 6994. Up to 1159 conditions per place. [2023-12-05 21:17:31,824 INFO L140 encePairwiseOnDemand]: 237/243 looper letters, 64 selfloop transitions, 30 changer transitions 7/308 dead transitions. [2023-12-05 21:17:31,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 308 transitions, 1797 flow [2023-12-05 21:17:31,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:17:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:17:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5597 transitions. [2023-12-05 21:17:31,833 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7677640603566529 [2023-12-05 21:17:31,833 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5597 transitions. [2023-12-05 21:17:31,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5597 transitions. [2023-12-05 21:17:31,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:31,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5597 transitions. [2023-12-05 21:17:31,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 186.56666666666666) internal successors, (5597), 30 states have internal predecessors, (5597), 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 21:17:31,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 243.0) internal successors, (7533), 31 states have internal predecessors, (7533), 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 21:17:31,853 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 243.0) internal successors, (7533), 31 states have internal predecessors, (7533), 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 21:17:31,854 INFO L308 CegarLoopForPetriNet]: 213 programPoint places, 56 predicate places. [2023-12-05 21:17:31,854 INFO L500 AbstractCegarLoop]: Abstraction has has 269 places, 308 transitions, 1797 flow [2023-12-05 21:17:31,855 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 186.47826086956522) internal successors, (4289), 23 states have internal predecessors, (4289), 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 21:17:31,855 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:31,856 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1, 1, 1] [2023-12-05 21:17:31,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:32,060 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:32,060 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:32,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:32,061 INFO L85 PathProgramCache]: Analyzing trace with hash -137290675, now seen corresponding path program 2 times [2023-12-05 21:17:32,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:32,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357250936] [2023-12-05 21:17:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:32,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:32,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:32,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357250936] [2023-12-05 21:17:32,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357250936] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:32,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111849140] [2023-12-05 21:17:32,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:32,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:32,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:32,230 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:32,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-05 21:17:32,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:17:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:32,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:17:32,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:32,323 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 21:17:32,418 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:32,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:32,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111849140] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:32,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:32,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:17:32,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194725713] [2023-12-05 21:17:32,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:32,420 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:17:32,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:32,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:17:32,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:17:32,421 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 243 [2023-12-05 21:17:32,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 308 transitions, 1797 flow. Second operand has 7 states, 7 states have (on average 154.14285714285714) internal successors, (1079), 7 states have internal predecessors, (1079), 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 21:17:32,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:32,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 243 [2023-12-05 21:17:32,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:32,988 INFO L124 PetriNetUnfolderBase]: 750/2718 cut-off events. [2023-12-05 21:17:32,988 INFO L125 PetriNetUnfolderBase]: For 8807/9351 co-relation queries the response was YES. [2023-12-05 21:17:32,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8755 conditions, 2718 events. 750/2718 cut-off events. For 8807/9351 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 23817 event pairs, 118 based on Foata normal form. 18/2567 useless extension candidates. Maximal degree in co-relation 8349. Up to 1135 conditions per place. [2023-12-05 21:17:33,009 INFO L140 encePairwiseOnDemand]: 234/243 looper letters, 166 selfloop transitions, 8 changer transitions 7/379 dead transitions. [2023-12-05 21:17:33,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 379 transitions, 2799 flow [2023-12-05 21:17:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:17:33,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:17:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1384 transitions. [2023-12-05 21:17:33,013 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7119341563786008 [2023-12-05 21:17:33,013 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1384 transitions. [2023-12-05 21:17:33,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1384 transitions. [2023-12-05 21:17:33,014 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:33,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1384 transitions. [2023-12-05 21:17:33,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 173.0) internal successors, (1384), 8 states have internal predecessors, (1384), 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 21:17:33,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 243.0) internal successors, (2187), 9 states have internal predecessors, (2187), 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 21:17:33,018 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 243.0) internal successors, (2187), 9 states have internal predecessors, (2187), 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 21:17:33,019 INFO L308 CegarLoopForPetriNet]: 213 programPoint places, 62 predicate places. [2023-12-05 21:17:33,021 INFO L500 AbstractCegarLoop]: Abstraction has has 275 places, 379 transitions, 2799 flow [2023-12-05 21:17:33,021 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 154.14285714285714) internal successors, (1079), 7 states have internal predecessors, (1079), 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 21:17:33,021 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:33,021 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1, 1, 1] [2023-12-05 21:17:33,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-05 21:17:33,241 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:33,244 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:33,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:33,245 INFO L85 PathProgramCache]: Analyzing trace with hash 38957083, now seen corresponding path program 1 times [2023-12-05 21:17:33,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:33,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118074703] [2023-12-05 21:17:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:33,265 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:17:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:33,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:17:33,293 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:17:33,294 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (34 of 35 remaining) [2023-12-05 21:17:33,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 35 remaining) [2023-12-05 21:17:33,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 35 remaining) [2023-12-05 21:17:33,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 35 remaining) [2023-12-05 21:17:33,295 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 35 remaining) [2023-12-05 21:17:33,296 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 35 remaining) [2023-12-05 21:17:33,297 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 35 remaining) [2023-12-05 21:17:33,298 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 35 remaining) [2023-12-05 21:17:33,298 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 35 remaining) [2023-12-05 21:17:33,298 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:17:33,298 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2023-12-05 21:17:33,300 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:17:33,300 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:17:33,325 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:17:33,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 338 transitions, 692 flow [2023-12-05 21:17:33,367 INFO L124 PetriNetUnfolderBase]: 80/560 cut-off events. [2023-12-05 21:17:33,367 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-12-05 21:17:33,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572 conditions, 560 events. 80/560 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2627 event pairs, 0 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 342. Up to 12 conditions per place. [2023-12-05 21:17:33,375 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 338 transitions, 692 flow [2023-12-05 21:17:33,380 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 338 transitions, 692 flow [2023-12-05 21:17:33,381 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:33,381 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;@2193161d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:33,381 INFO L363 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-12-05 21:17:33,383 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:33,383 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:17:33,383 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:33,383 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:33,383 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] [2023-12-05 21:17:33,383 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:33,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1967188187, now seen corresponding path program 1 times [2023-12-05 21:17:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:33,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578228781] [2023-12-05 21:17:33,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:33,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:33,401 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 21:17:33,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:33,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578228781] [2023-12-05 21:17:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578228781] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:33,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469426446] [2023-12-05 21:17:33,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:33,402 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:33,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:33,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:33,404 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 338 [2023-12-05 21:17:33,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 338 transitions, 692 flow. Second operand has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 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 21:17:33,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:33,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 338 [2023-12-05 21:17:33,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:34,327 INFO L124 PetriNetUnfolderBase]: 1577/9190 cut-off events. [2023-12-05 21:17:34,327 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-12-05 21:17:34,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11657 conditions, 9190 events. 1577/9190 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 107035 event pairs, 1464 based on Foata normal form. 2911/10503 useless extension candidates. Maximal degree in co-relation 1353. Up to 2411 conditions per place. [2023-12-05 21:17:34,410 INFO L140 encePairwiseOnDemand]: 293/338 looper letters, 39 selfloop transitions, 2 changer transitions 1/291 dead transitions. [2023-12-05 21:17:34,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 291 transitions, 680 flow [2023-12-05 21:17:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:34,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:34,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 853 transitions. [2023-12-05 21:17:34,412 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8412228796844181 [2023-12-05 21:17:34,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 853 transitions. [2023-12-05 21:17:34,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 853 transitions. [2023-12-05 21:17:34,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:34,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 853 transitions. [2023-12-05 21:17:34,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.3333333333333) internal successors, (853), 3 states have internal predecessors, (853), 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 21:17:34,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 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 21:17:34,416 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 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 21:17:34,418 INFO L308 CegarLoopForPetriNet]: 295 programPoint places, -7 predicate places. [2023-12-05 21:17:34,418 INFO L500 AbstractCegarLoop]: Abstraction has has 288 places, 291 transitions, 680 flow [2023-12-05 21:17:34,418 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 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 21:17:34,418 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:34,418 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, 1] [2023-12-05 21:17:34,418 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:17:34,418 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:34,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:34,419 INFO L85 PathProgramCache]: Analyzing trace with hash -209426240, now seen corresponding path program 1 times [2023-12-05 21:17:34,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:34,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573022442] [2023-12-05 21:17:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:34,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:34,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:34,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:34,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573022442] [2023-12-05 21:17:34,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573022442] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:34,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956523211] [2023-12-05 21:17:34,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:34,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:34,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:34,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:34,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-05 21:17:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:34,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:34,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:34,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:34,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:34,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956523211] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:34,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:34,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:34,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263084658] [2023-12-05 21:17:34,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:34,584 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:34,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:34,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:34,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:34,586 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 338 [2023-12-05 21:17:34,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 291 transitions, 680 flow. Second operand has 10 states, 10 states have (on average 257.1) internal successors, (2571), 10 states have internal predecessors, (2571), 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 21:17:34,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:34,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 338 [2023-12-05 21:17:34,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:35,731 INFO L124 PetriNetUnfolderBase]: 1577/9197 cut-off events. [2023-12-05 21:17:35,732 INFO L125 PetriNetUnfolderBase]: For 1032/1116 co-relation queries the response was YES. [2023-12-05 21:17:35,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14092 conditions, 9197 events. 1577/9197 cut-off events. For 1032/1116 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 107170 event pairs, 1464 based on Foata normal form. 0/7599 useless extension candidates. Maximal degree in co-relation 1697. Up to 2416 conditions per place. [2023-12-05 21:17:35,799 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 40 selfloop transitions, 9 changer transitions 1/298 dead transitions. [2023-12-05 21:17:35,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 298 transitions, 802 flow [2023-12-05 21:17:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:35,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2346 transitions. [2023-12-05 21:17:35,803 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7712031558185405 [2023-12-05 21:17:35,804 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2346 transitions. [2023-12-05 21:17:35,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2346 transitions. [2023-12-05 21:17:35,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:35,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2346 transitions. [2023-12-05 21:17:35,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 260.6666666666667) internal successors, (2346), 9 states have internal predecessors, (2346), 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 21:17:35,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 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 21:17:35,810 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 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 21:17:35,811 INFO L308 CegarLoopForPetriNet]: 295 programPoint places, 1 predicate places. [2023-12-05 21:17:35,811 INFO L500 AbstractCegarLoop]: Abstraction has has 296 places, 298 transitions, 802 flow [2023-12-05 21:17:35,812 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 257.1) internal successors, (2571), 10 states have internal predecessors, (2571), 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 21:17:35,812 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:35,812 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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 21:17:35,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:36,018 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:36,018 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:36,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash -126538784, now seen corresponding path program 2 times [2023-12-05 21:17:36,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:36,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819576949] [2023-12-05 21:17:36,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:36,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:36,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819576949] [2023-12-05 21:17:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819576949] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:36,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069140118] [2023-12-05 21:17:36,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:36,063 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:36,065 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 338 [2023-12-05 21:17:36,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 298 transitions, 802 flow. Second operand has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 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 21:17:36,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:36,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 338 [2023-12-05 21:17:36,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:41,482 INFO L124 PetriNetUnfolderBase]: 18441/48412 cut-off events. [2023-12-05 21:17:41,482 INFO L125 PetriNetUnfolderBase]: For 26560/26972 co-relation queries the response was YES. [2023-12-05 21:17:41,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99971 conditions, 48412 events. 18441/48412 cut-off events. For 26560/26972 co-relation queries the response was YES. Maximal size of possible extension queue 1749. Compared 621015 event pairs, 15858 based on Foata normal form. 0/39235 useless extension candidates. Maximal degree in co-relation 7605. Up to 24699 conditions per place. [2023-12-05 21:17:41,915 INFO L140 encePairwiseOnDemand]: 334/338 looper letters, 106 selfloop transitions, 2 changer transitions 1/332 dead transitions. [2023-12-05 21:17:41,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 332 transitions, 1150 flow [2023-12-05 21:17:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:41,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 767 transitions. [2023-12-05 21:17:41,917 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7564102564102564 [2023-12-05 21:17:41,917 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 767 transitions. [2023-12-05 21:17:41,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 767 transitions. [2023-12-05 21:17:41,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:41,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 767 transitions. [2023-12-05 21:17:41,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 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 21:17:41,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 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 21:17:41,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 338.0) internal successors, (1352), 4 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 21:17:41,920 INFO L308 CegarLoopForPetriNet]: 295 programPoint places, 1 predicate places. [2023-12-05 21:17:41,920 INFO L500 AbstractCegarLoop]: Abstraction has has 296 places, 332 transitions, 1150 flow [2023-12-05 21:17:41,921 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.66666666666666) internal successors, (665), 3 states have internal predecessors, (665), 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 21:17:41,921 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:41,921 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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 21:17:41,921 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:17:41,921 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:41,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash -126538783, now seen corresponding path program 1 times [2023-12-05 21:17:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:41,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015392777] [2023-12-05 21:17:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:41,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:41,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:41,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:41,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015392777] [2023-12-05 21:17:41,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015392777] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:41,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990052283] [2023-12-05 21:17:41,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:41,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:41,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:42,009 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:42,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-05 21:17:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:42,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:42,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:42,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:42,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:42,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990052283] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:42,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:42,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:42,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222837678] [2023-12-05 21:17:42,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:42,192 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:42,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:42,197 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 338 [2023-12-05 21:17:42,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 332 transitions, 1150 flow. Second operand has 18 states, 18 states have (on average 257.27777777777777) internal successors, (4631), 18 states have internal predecessors, (4631), 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 21:17:42,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:42,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 338 [2023-12-05 21:17:42,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:48,146 INFO L124 PetriNetUnfolderBase]: 18441/48432 cut-off events. [2023-12-05 21:17:48,146 INFO L125 PetriNetUnfolderBase]: For 52641/53259 co-relation queries the response was YES. [2023-12-05 21:17:48,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111744 conditions, 48432 events. 18441/48432 cut-off events. For 52641/53259 co-relation queries the response was YES. Maximal size of possible extension queue 1749. Compared 620705 event pairs, 15858 based on Foata normal form. 0/39255 useless extension candidates. Maximal degree in co-relation 8975. Up to 24699 conditions per place. [2023-12-05 21:17:48,596 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 64 selfloop transitions, 21 changer transitions 1/352 dead transitions. [2023-12-05 21:17:48,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 352 transitions, 1432 flow [2023-12-05 21:17:48,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:48,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5428 transitions. [2023-12-05 21:17:48,613 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7647224570301493 [2023-12-05 21:17:48,614 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5428 transitions. [2023-12-05 21:17:48,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5428 transitions. [2023-12-05 21:17:48,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:48,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5428 transitions. [2023-12-05 21:17:48,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 258.4761904761905) internal successors, (5428), 21 states have internal predecessors, (5428), 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 21:17:48,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 338.0) internal successors, (7436), 22 states have internal predecessors, (7436), 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 21:17:48,631 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 338.0) internal successors, (7436), 22 states have internal predecessors, (7436), 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 21:17:48,632 INFO L308 CegarLoopForPetriNet]: 295 programPoint places, 21 predicate places. [2023-12-05 21:17:48,632 INFO L500 AbstractCegarLoop]: Abstraction has has 316 places, 352 transitions, 1432 flow [2023-12-05 21:17:48,633 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 257.27777777777777) internal successors, (4631), 18 states have internal predecessors, (4631), 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 21:17:48,633 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:48,633 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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 21:17:48,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:48,840 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:48,841 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:48,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:48,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1523287519, now seen corresponding path program 2 times [2023-12-05 21:17:48,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:48,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518256712] [2023-12-05 21:17:48,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:48,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:48,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:49,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518256712] [2023-12-05 21:17:49,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518256712] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:49,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064116131] [2023-12-05 21:17:49,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:49,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:49,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:49,040 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:49,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-05 21:17:49,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:17:49,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:49,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-05 21:17:49,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:49,140 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 21:17:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:49,174 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064116131] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:49,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:49,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2023-12-05 21:17:49,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192260848] [2023-12-05 21:17:49,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:49,176 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-12-05 21:17:49,177 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 338 [2023-12-05 21:17:49,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 352 transitions, 1432 flow. Second operand has 4 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 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 21:17:49,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:49,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 338 [2023-12-05 21:17:49,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:59,998 INFO L124 PetriNetUnfolderBase]: 36964/81079 cut-off events. [2023-12-05 21:17:59,998 INFO L125 PetriNetUnfolderBase]: For 168726/174152 co-relation queries the response was YES. [2023-12-05 21:18:00,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238136 conditions, 81079 events. 36964/81079 cut-off events. For 168726/174152 co-relation queries the response was YES. Maximal size of possible extension queue 2931. Compared 1018396 event pairs, 19266 based on Foata normal form. 0/73770 useless extension candidates. Maximal degree in co-relation 18725. Up to 45198 conditions per place. [2023-12-05 21:18:00,950 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 157 selfloop transitions, 4 changer transitions 1/410 dead transitions. [2023-12-05 21:18:00,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 410 transitions, 2094 flow [2023-12-05 21:18:00,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:18:00,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:18:00,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 993 transitions. [2023-12-05 21:18:00,952 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7344674556213018 [2023-12-05 21:18:00,952 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 993 transitions. [2023-12-05 21:18:00,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 993 transitions. [2023-12-05 21:18:00,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:00,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 993 transitions. [2023-12-05 21:18:00,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 248.25) internal successors, (993), 4 states have internal predecessors, (993), 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 21:18:00,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 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 21:18:00,955 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 338.0) internal successors, (1690), 5 states have internal predecessors, (1690), 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 21:18:00,955 INFO L308 CegarLoopForPetriNet]: 295 programPoint places, 24 predicate places. [2023-12-05 21:18:00,955 INFO L500 AbstractCegarLoop]: Abstraction has has 319 places, 410 transitions, 2094 flow [2023-12-05 21:18:00,955 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 216.25) internal successors, (865), 4 states have internal predecessors, (865), 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 21:18:00,955 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:00,955 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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, 1, 1, 1, 1] [2023-12-05 21:18:00,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-05 21:18:01,159 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-05 21:18:01,160 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:01,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:01,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1767402173, now seen corresponding path program 1 times [2023-12-05 21:18:01,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:01,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295652593] [2023-12-05 21:18:01,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:01,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:18:01,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:01,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295652593] [2023-12-05 21:18:01,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295652593] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:01,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437694254] [2023-12-05 21:18:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:01,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:01,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:01,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:01,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-05 21:18:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:01,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:18:01,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:01,484 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:18:01,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:18:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:18:01,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437694254] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:18:01,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:18:01,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:18:01,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642725469] [2023-12-05 21:18:01,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:18:01,736 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:18:01,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:01,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:18:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:18:01,739 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 338 [2023-12-05 21:18:01,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 410 transitions, 2094 flow. Second operand has 23 states, 23 states have (on average 257.4782608695652) internal successors, (5922), 23 states have internal predecessors, (5922), 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 21:18:01,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:01,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 338 [2023-12-05 21:18:01,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:12,723 INFO L124 PetriNetUnfolderBase]: 36964/81098 cut-off events. [2023-12-05 21:18:12,723 INFO L125 PetriNetUnfolderBase]: For 250651/256588 co-relation queries the response was YES. [2023-12-05 21:18:13,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258826 conditions, 81098 events. 36964/81098 cut-off events. For 250651/256588 co-relation queries the response was YES. Maximal size of possible extension queue 2931. Compared 1017890 event pairs, 20892 based on Foata normal form. 0/73786 useless extension candidates. Maximal degree in co-relation 20283. Up to 45198 conditions per place. [2023-12-05 21:18:13,706 INFO L140 encePairwiseOnDemand]: 332/338 looper letters, 94 selfloop transitions, 30 changer transitions 1/425 dead transitions. [2023-12-05 21:18:13,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 425 transitions, 2456 flow [2023-12-05 21:18:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:18:13,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:18:13,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7737 transitions. [2023-12-05 21:18:13,712 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.76301775147929 [2023-12-05 21:18:13,712 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7737 transitions. [2023-12-05 21:18:13,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7737 transitions. [2023-12-05 21:18:13,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:13,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7737 transitions. [2023-12-05 21:18:13,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 257.9) internal successors, (7737), 30 states have internal predecessors, (7737), 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 21:18:13,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 338.0) internal successors, (10478), 31 states have internal predecessors, (10478), 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 21:18:13,729 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 338.0) internal successors, (10478), 31 states have internal predecessors, (10478), 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 21:18:13,729 INFO L308 CegarLoopForPetriNet]: 295 programPoint places, 53 predicate places. [2023-12-05 21:18:13,729 INFO L500 AbstractCegarLoop]: Abstraction has has 348 places, 425 transitions, 2456 flow [2023-12-05 21:18:13,730 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 257.4782608695652) internal successors, (5922), 23 states have internal predecessors, (5922), 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 21:18:13,730 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:13,731 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1, 1, 1] [2023-12-05 21:18:13,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-05 21:18:13,935 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-05 21:18:13,936 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:13,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:13,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1664661022, now seen corresponding path program 2 times [2023-12-05 21:18:13,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:13,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105552417] [2023-12-05 21:18:13,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:13,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:14,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:14,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105552417] [2023-12-05 21:18:14,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105552417] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:14,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510898276] [2023-12-05 21:18:14,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:18:14,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:14,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:14,048 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:14,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-05 21:18:14,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:18:14,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:18:14,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:18:14,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:14,150 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 21:18:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:14,229 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:18:14,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510898276] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:14,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:18:14,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:18:14,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863512976] [2023-12-05 21:18:14,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:14,230 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:18:14,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:18:14,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:18:14,231 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 338 [2023-12-05 21:18:14,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 425 transitions, 2456 flow. Second operand has 7 states, 7 states have (on average 215.14285714285714) internal successors, (1506), 7 states have internal predecessors, (1506), 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 21:18:14,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:14,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 338 [2023-12-05 21:18:14,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:25,911 INFO L124 PetriNetUnfolderBase]: 36211/81645 cut-off events. [2023-12-05 21:18:25,911 INFO L125 PetriNetUnfolderBase]: For 333886/351897 co-relation queries the response was YES. [2023-12-05 21:18:26,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303215 conditions, 81645 events. 36211/81645 cut-off events. For 333886/351897 co-relation queries the response was YES. Maximal size of possible extension queue 2886. Compared 1036301 event pairs, 6890 based on Foata normal form. 231/76353 useless extension candidates. Maximal degree in co-relation 173202. Up to 43433 conditions per place. [2023-12-05 21:18:27,077 INFO L140 encePairwiseOnDemand]: 329/338 looper letters, 313 selfloop transitions, 10 changer transitions 1/586 dead transitions. [2023-12-05 21:18:27,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 586 transitions, 4554 flow [2023-12-05 21:18:27,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:18:27,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:18:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2215 transitions. [2023-12-05 21:18:27,080 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7281393819855358 [2023-12-05 21:18:27,080 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2215 transitions. [2023-12-05 21:18:27,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2215 transitions. [2023-12-05 21:18:27,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:27,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2215 transitions. [2023-12-05 21:18:27,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 246.11111111111111) internal successors, (2215), 9 states have internal predecessors, (2215), 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 21:18:27,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 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 21:18:27,085 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 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 21:18:27,085 INFO L308 CegarLoopForPetriNet]: 295 programPoint places, 60 predicate places. [2023-12-05 21:18:27,085 INFO L500 AbstractCegarLoop]: Abstraction has has 355 places, 586 transitions, 4554 flow [2023-12-05 21:18:27,086 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 215.14285714285714) internal successors, (1506), 7 states have internal predecessors, (1506), 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 21:18:27,086 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:27,086 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:27,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-05 21:18:27,309 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-05 21:18:27,310 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:27,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1941821636, now seen corresponding path program 1 times [2023-12-05 21:18:27,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:27,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986605650] [2023-12-05 21:18:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:27,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:27,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:27,378 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:27,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:27,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986605650] [2023-12-05 21:18:27,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986605650] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:27,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868162289] [2023-12-05 21:18:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:27,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:27,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:27,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:27,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-05 21:18:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:27,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:18:27,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:27,516 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:27,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:18:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:27,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868162289] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:18:27,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:18:27,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:18:27,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954256134] [2023-12-05 21:18:27,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:18:27,541 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:18:27,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:27,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:18:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:18:27,543 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 338 [2023-12-05 21:18:27,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 586 transitions, 4554 flow. Second operand has 10 states, 10 states have (on average 256.6) internal successors, (2566), 10 states have internal predecessors, (2566), 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 21:18:27,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:27,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 338 [2023-12-05 21:18:27,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:29,581 INFO L124 PetriNetUnfolderBase]: 5579/14359 cut-off events. [2023-12-05 21:18:29,581 INFO L125 PetriNetUnfolderBase]: For 58249/60821 co-relation queries the response was YES. [2023-12-05 21:18:29,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50625 conditions, 14359 events. 5579/14359 cut-off events. For 58249/60821 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 152879 event pairs, 2222 based on Foata normal form. 220/14209 useless extension candidates. Maximal degree in co-relation 28491. Up to 7247 conditions per place. [2023-12-05 21:18:29,697 INFO L140 encePairwiseOnDemand]: 333/338 looper letters, 121 selfloop transitions, 7 changer transitions 1/434 dead transitions. [2023-12-05 21:18:29,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 434 transitions, 3762 flow [2023-12-05 21:18:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:18:29,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:18:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2392 transitions. [2023-12-05 21:18:29,699 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7863247863247863 [2023-12-05 21:18:29,699 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2392 transitions. [2023-12-05 21:18:29,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2392 transitions. [2023-12-05 21:18:29,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:29,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2392 transitions. [2023-12-05 21:18:29,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 265.77777777777777) internal successors, (2392), 9 states have internal predecessors, (2392), 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 21:18:29,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 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 21:18:29,704 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 338.0) internal successors, (3380), 10 states have internal predecessors, (3380), 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 21:18:29,704 INFO L308 CegarLoopForPetriNet]: 295 programPoint places, -8 predicate places. [2023-12-05 21:18:29,704 INFO L500 AbstractCegarLoop]: Abstraction has has 287 places, 434 transitions, 3762 flow [2023-12-05 21:18:29,705 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 256.6) internal successors, (2566), 10 states have internal predecessors, (2566), 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 21:18:29,705 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:29,705 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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, 1, 1, 1, 1] [2023-12-05 21:18:29,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-05 21:18:29,906 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-05 21:18:29,906 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:29,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1049812550, now seen corresponding path program 1 times [2023-12-05 21:18:29,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:29,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459233741] [2023-12-05 21:18:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:29,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:29,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:18:29,927 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:18:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:18:29,957 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:18:29,957 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:18:29,958 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2023-12-05 21:18:29,958 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 45 remaining) [2023-12-05 21:18:29,958 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 45 remaining) [2023-12-05 21:18:29,958 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 45 remaining) [2023-12-05 21:18:29,959 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 45 remaining) [2023-12-05 21:18:29,960 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 45 remaining) [2023-12-05 21:18:29,960 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 45 remaining) [2023-12-05 21:18:29,961 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 45 remaining) [2023-12-05 21:18:29,961 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 45 remaining) [2023-12-05 21:18:29,961 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 45 remaining) [2023-12-05 21:18:29,961 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 45 remaining) [2023-12-05 21:18:29,961 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 45 remaining) [2023-12-05 21:18:29,961 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 45 remaining) [2023-12-05 21:18:29,962 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 45 remaining) [2023-12-05 21:18:29,962 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-05 21:18:29,962 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1] [2023-12-05 21:18:29,963 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:18:29,963 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:18:30,002 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-05 21:18:30,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 377 places, 433 transitions, 893 flow [2023-12-05 21:18:30,096 INFO L124 PetriNetUnfolderBase]: 117/819 cut-off events. [2023-12-05 21:18:30,096 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-12-05 21:18:30,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844 conditions, 819 events. 117/819 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4264 event pairs, 1 based on Foata normal form. 0/604 useless extension candidates. Maximal degree in co-relation 568. Up to 16 conditions per place. [2023-12-05 21:18:30,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 377 places, 433 transitions, 893 flow [2023-12-05 21:18:30,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 377 places, 433 transitions, 893 flow [2023-12-05 21:18:30,126 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:18:30,126 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;@2193161d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:18:30,126 INFO L363 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-12-05 21:18:30,128 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:18:30,128 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:18:30,128 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:18:30,128 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:30,128 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] [2023-12-05 21:18:30,128 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:18:30,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:30,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1699601046, now seen corresponding path program 1 times [2023-12-05 21:18:30,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:30,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637429105] [2023-12-05 21:18:30,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:30,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:30,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:30,147 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 21:18:30,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:30,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637429105] [2023-12-05 21:18:30,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637429105] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:30,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:30,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:18:30,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159754293] [2023-12-05 21:18:30,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:30,148 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:18:30,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:18:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:18:30,149 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 327 out of 433 [2023-12-05 21:18:30,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 433 transitions, 893 flow. Second operand has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 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 21:18:30,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:30,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 327 of 433 [2023-12-05 21:18:30,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:42,531 INFO L124 PetriNetUnfolderBase]: 22024/91989 cut-off events. [2023-12-05 21:18:42,531 INFO L125 PetriNetUnfolderBase]: For 1657/1657 co-relation queries the response was YES. [2023-12-05 21:18:43,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122330 conditions, 91989 events. 22024/91989 cut-off events. For 1657/1657 co-relation queries the response was YES. Maximal size of possible extension queue 2216. Compared 1433527 event pairs, 21001 based on Foata normal form. 36078/113392 useless extension candidates. Maximal degree in co-relation 11644. Up to 29680 conditions per place. [2023-12-05 21:18:43,965 INFO L140 encePairwiseOnDemand]: 375/433 looper letters, 49 selfloop transitions, 2 changer transitions 1/370 dead transitions. [2023-12-05 21:18:43,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 370 transitions, 869 flow [2023-12-05 21:18:43,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:18:43,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:18:43,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1089 transitions. [2023-12-05 21:18:43,967 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8383371824480369 [2023-12-05 21:18:43,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1089 transitions. [2023-12-05 21:18:43,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1089 transitions. [2023-12-05 21:18:43,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:43,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1089 transitions. [2023-12-05 21:18:43,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.0) internal successors, (1089), 3 states have internal predecessors, (1089), 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 21:18:43,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 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 21:18:43,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 433.0) internal successors, (1732), 4 states have internal predecessors, (1732), 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 21:18:43,970 INFO L308 CegarLoopForPetriNet]: 377 programPoint places, -10 predicate places. [2023-12-05 21:18:43,970 INFO L500 AbstractCegarLoop]: Abstraction has has 367 places, 370 transitions, 869 flow [2023-12-05 21:18:43,970 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 328.3333333333333) internal successors, (985), 3 states have internal predecessors, (985), 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 21:18:43,970 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:43,970 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, 1] [2023-12-05 21:18:43,970 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-05 21:18:43,970 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:18:43,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:43,970 INFO L85 PathProgramCache]: Analyzing trace with hash 472664416, now seen corresponding path program 1 times [2023-12-05 21:18:43,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:43,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805767670] [2023-12-05 21:18:43,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:43,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:43,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:43,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805767670] [2023-12-05 21:18:43,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805767670] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:43,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053001116] [2023-12-05 21:18:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:43,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:44,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:44,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-05 21:18:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:44,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:18:44,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:44,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:18:44,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:44,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053001116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:18:44,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:18:44,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:18:44,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224317394] [2023-12-05 21:18:44,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:18:44,149 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:18:44,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:44,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:18:44,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:18:44,151 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 326 out of 433 [2023-12-05 21:18:44,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 370 transitions, 869 flow. Second operand has 10 states, 10 states have (on average 328.1) internal successors, (3281), 10 states have internal predecessors, (3281), 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 21:18:44,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:44,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 326 of 433 [2023-12-05 21:18:44,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand