/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:21:27,677 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:21:27,737 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:21:27,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:21:27,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:21:27,767 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:21:27,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:21:27,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:21:27,768 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:21:27,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:21:27,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:21:27,772 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:21:27,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:21:27,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:21:27,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:21:27,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:21:27,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:21:27,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:21:27,774 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:21:27,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:21:27,774 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:21:27,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:21:27,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:21:27,775 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:21:27,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:21:27,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:21:27,775 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:21:27,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:21:27,775 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:21:27,775 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:21:27,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:21:27,776 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:21:27,776 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:21:27,776 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:21:27,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:21:27,963 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:21:27,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:21:27,966 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:21:27,966 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:21:27,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-12-05 21:21:28,899 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:21:29,102 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:21:29,103 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-12-05 21:21:29,115 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b5946141/ceb3f206751f4300bbffc1892df13c92/FLAG260ea6d16 [2023-12-05 21:21:29,127 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b5946141/ceb3f206751f4300bbffc1892df13c92 [2023-12-05 21:21:29,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:21:29,131 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:21:29,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:21:29,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:21:29,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:21:29,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e3be41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29, skipping insertion in model container [2023-12-05 21:21:29,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,173 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:21:29,396 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:21:29,409 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:21:29,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:21:29,501 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:21:29,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29 WrapperNode [2023-12-05 21:21:29,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:21:29,503 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:21:29,503 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:21:29,503 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:21:29,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,525 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,542 INFO L138 Inliner]: procedures = 169, calls = 40, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 146 [2023-12-05 21:21:29,542 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:21:29,543 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:21:29,543 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:21:29,543 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:21:29,548 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,551 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,551 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,556 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,557 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,559 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,561 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:21:29,562 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:21:29,562 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:21:29,562 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:21:29,563 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (1/1) ... [2023-12-05 21:21:29,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:21:29,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:29,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:21:29,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:21:29,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:21:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-12-05 21:21:29,609 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-12-05 21:21:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-12-05 21:21:29,609 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-12-05 21:21:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:21:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:21:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:21:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:21:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:21:29,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-05 21:21:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:21:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:21:29,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:21:29,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:21:29,611 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:21:29,699 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:21:29,700 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:21:29,969 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:21:29,983 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:21:29,983 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-05 21:21:29,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:21:29 BoogieIcfgContainer [2023-12-05 21:21:29,987 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:21:29,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:21:29,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:21:29,991 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:21:29,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:21:29" (1/3) ... [2023-12-05 21:21:29,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb206a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:21:29, skipping insertion in model container [2023-12-05 21:21:29,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:21:29" (2/3) ... [2023-12-05 21:21:29,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb206a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:21:29, skipping insertion in model container [2023-12-05 21:21:29,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:21:29" (3/3) ... [2023-12-05 21:21:29,993 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-12-05 21:21:30,005 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:21:30,006 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2023-12-05 21:21:30,006 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:21:30,091 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:21:30,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 167 transitions, 348 flow [2023-12-05 21:21:30,189 INFO L124 PetriNetUnfolderBase]: 12/165 cut-off events. [2023-12-05 21:21:30,190 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:21:30,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 165 events. 12/165 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 359 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-12-05 21:21:30,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 167 transitions, 348 flow [2023-12-05 21:21:30,204 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 155 transitions, 319 flow [2023-12-05 21:21:30,215 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:21:30,220 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;@74e2b369, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:21:30,221 INFO L363 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-12-05 21:21:30,235 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:21:30,235 INFO L124 PetriNetUnfolderBase]: 0/43 cut-off events. [2023-12-05 21:21:30,236 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:21:30,236 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:30,236 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, 1] [2023-12-05 21:21:30,237 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:30,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:30,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1785241401, now seen corresponding path program 1 times [2023-12-05 21:21:30,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:30,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269360221] [2023-12-05 21:21:30,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:30,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:30,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:30,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269360221] [2023-12-05 21:21:30,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269360221] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:30,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:30,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:21:30,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216761799] [2023-12-05 21:21:30,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:30,631 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:30,652 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 167 [2023-12-05 21:21:30,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 155 transitions, 319 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:30,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:30,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 167 [2023-12-05 21:21:30,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:30,785 INFO L124 PetriNetUnfolderBase]: 164/595 cut-off events. [2023-12-05 21:21:30,785 INFO L125 PetriNetUnfolderBase]: For 20/24 co-relation queries the response was YES. [2023-12-05 21:21:30,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 595 events. 164/595 cut-off events. For 20/24 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3691 event pairs, 120 based on Foata normal form. 92/555 useless extension candidates. Maximal degree in co-relation 732. Up to 251 conditions per place. [2023-12-05 21:21:30,793 INFO L140 encePairwiseOnDemand]: 158/167 looper letters, 26 selfloop transitions, 1 changer transitions 0/141 dead transitions. [2023-12-05 21:21:30,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 141 transitions, 345 flow [2023-12-05 21:21:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:30,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:30,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-12-05 21:21:30,808 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8183632734530938 [2023-12-05 21:21:30,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-12-05 21:21:30,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-12-05 21:21:30,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:30,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-12-05 21:21:30,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:30,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:30,821 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:30,823 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, -6 predicate places. [2023-12-05 21:21:30,824 INFO L500 AbstractCegarLoop]: Abstraction has has 144 places, 141 transitions, 345 flow [2023-12-05 21:21:30,824 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:30,824 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:30,824 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, 1] [2023-12-05 21:21:30,824 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:21:30,825 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:30,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1785241400, now seen corresponding path program 1 times [2023-12-05 21:21:30,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:30,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836942088] [2023-12-05 21:21:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:30,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:30,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:30,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836942088] [2023-12-05 21:21:30,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836942088] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:30,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:30,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:21:30,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248761849] [2023-12-05 21:21:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:30,961 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:30,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:30,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:30,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:30,962 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 167 [2023-12-05 21:21:30,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 141 transitions, 345 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:30,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:30,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 167 [2023-12-05 21:21:30,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:31,067 INFO L124 PetriNetUnfolderBase]: 167/662 cut-off events. [2023-12-05 21:21:31,068 INFO L125 PetriNetUnfolderBase]: For 132/191 co-relation queries the response was YES. [2023-12-05 21:21:31,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 662 events. 167/662 cut-off events. For 132/191 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4418 event pairs, 119 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 934. Up to 222 conditions per place. [2023-12-05 21:21:31,072 INFO L140 encePairwiseOnDemand]: 164/167 looper letters, 23 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2023-12-05 21:21:31,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 139 transitions, 385 flow [2023-12-05 21:21:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:31,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:31,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-12-05 21:21:31,074 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.812375249500998 [2023-12-05 21:21:31,089 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-12-05 21:21:31,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-12-05 21:21:31,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:31,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-12-05 21:21:31,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,093 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, -6 predicate places. [2023-12-05 21:21:31,093 INFO L500 AbstractCegarLoop]: Abstraction has has 144 places, 139 transitions, 385 flow [2023-12-05 21:21:31,093 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,093 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:31,093 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:31,093 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:21:31,094 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:31,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:31,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1738176824, now seen corresponding path program 1 times [2023-12-05 21:21:31,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:31,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486204892] [2023-12-05 21:21:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:31,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:31,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:31,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:31,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:31,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486204892] [2023-12-05 21:21:31,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486204892] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:31,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:31,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:21:31,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816254578] [2023-12-05 21:21:31,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:31,224 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:31,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:31,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:31,227 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 167 [2023-12-05 21:21:31,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 139 transitions, 385 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:31,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 167 [2023-12-05 21:21:31,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:31,306 INFO L124 PetriNetUnfolderBase]: 158/612 cut-off events. [2023-12-05 21:21:31,310 INFO L125 PetriNetUnfolderBase]: For 326/465 co-relation queries the response was YES. [2023-12-05 21:21:31,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 612 events. 158/612 cut-off events. For 326/465 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3923 event pairs, 113 based on Foata normal form. 11/551 useless extension candidates. Maximal degree in co-relation 1054. Up to 215 conditions per place. [2023-12-05 21:21:31,314 INFO L140 encePairwiseOnDemand]: 164/167 looper letters, 23 selfloop transitions, 1 changer transitions 0/137 dead transitions. [2023-12-05 21:21:31,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 137 transitions, 425 flow [2023-12-05 21:21:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:31,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-12-05 21:21:31,316 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.812375249500998 [2023-12-05 21:21:31,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-12-05 21:21:31,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-12-05 21:21:31,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:31,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-12-05 21:21:31,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,318 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,319 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, -6 predicate places. [2023-12-05 21:21:31,319 INFO L500 AbstractCegarLoop]: Abstraction has has 144 places, 137 transitions, 425 flow [2023-12-05 21:21:31,319 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,319 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:31,319 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:31,319 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:21:31,319 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:31,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1738176823, now seen corresponding path program 1 times [2023-12-05 21:21:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:31,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193802359] [2023-12-05 21:21:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:31,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:31,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193802359] [2023-12-05 21:21:31,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193802359] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:31,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:31,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:21:31,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861411580] [2023-12-05 21:21:31,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:31,385 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:31,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:31,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:31,387 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 167 [2023-12-05 21:21:31,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 137 transitions, 425 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:31,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 167 [2023-12-05 21:21:31,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:31,464 INFO L124 PetriNetUnfolderBase]: 145/558 cut-off events. [2023-12-05 21:21:31,464 INFO L125 PetriNetUnfolderBase]: For 562/781 co-relation queries the response was YES. [2023-12-05 21:21:31,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1389 conditions, 558 events. 145/558 cut-off events. For 562/781 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3446 event pairs, 103 based on Foata normal form. 12/502 useless extension candidates. Maximal degree in co-relation 1148. Up to 194 conditions per place. [2023-12-05 21:21:31,468 INFO L140 encePairwiseOnDemand]: 164/167 looper letters, 22 selfloop transitions, 1 changer transitions 0/135 dead transitions. [2023-12-05 21:21:31,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 135 transitions, 459 flow [2023-12-05 21:21:31,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:31,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-12-05 21:21:31,470 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7984031936127745 [2023-12-05 21:21:31,470 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-12-05 21:21:31,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-12-05 21:21:31,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:31,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-12-05 21:21:31,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,472 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,473 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, -6 predicate places. [2023-12-05 21:21:31,473 INFO L500 AbstractCegarLoop]: Abstraction has has 144 places, 135 transitions, 459 flow [2023-12-05 21:21:31,474 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,474 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:31,474 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:31,474 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:21:31,474 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:31,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1502162249, now seen corresponding path program 1 times [2023-12-05 21:21:31,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:31,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248111506] [2023-12-05 21:21:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:31,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:31,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:31,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:31,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248111506] [2023-12-05 21:21:31,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248111506] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:31,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:31,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:21:31,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650008642] [2023-12-05 21:21:31,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:31,816 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:21:31,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:21:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:21:31,818 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 167 [2023-12-05 21:21:31,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 135 transitions, 459 flow. Second operand has 7 states, 7 states have (on average 111.57142857142857) internal successors, (781), 7 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:31,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:31,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 167 [2023-12-05 21:21:31,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:32,107 INFO L124 PetriNetUnfolderBase]: 358/1244 cut-off events. [2023-12-05 21:21:32,108 INFO L125 PetriNetUnfolderBase]: For 2294/2473 co-relation queries the response was YES. [2023-12-05 21:21:32,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3314 conditions, 1244 events. 358/1244 cut-off events. For 2294/2473 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 8152 event pairs, 123 based on Foata normal form. 52/1144 useless extension candidates. Maximal degree in co-relation 2933. Up to 389 conditions per place. [2023-12-05 21:21:32,117 INFO L140 encePairwiseOnDemand]: 158/167 looper letters, 44 selfloop transitions, 5 changer transitions 0/147 dead transitions. [2023-12-05 21:21:32,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 147 transitions, 659 flow [2023-12-05 21:21:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-05 21:21:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-12-05 21:21:32,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 817 transitions. [2023-12-05 21:21:32,119 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6988879384088965 [2023-12-05 21:21:32,119 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 817 transitions. [2023-12-05 21:21:32,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 817 transitions. [2023-12-05 21:21:32,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:32,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 817 transitions. [2023-12-05 21:21:32,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 116.71428571428571) internal successors, (817), 7 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,123 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 167.0) internal successors, (1336), 8 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,125 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, -2 predicate places. [2023-12-05 21:21:32,125 INFO L500 AbstractCegarLoop]: Abstraction has has 148 places, 147 transitions, 659 flow [2023-12-05 21:21:32,125 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.57142857142857) internal successors, (781), 7 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,125 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:32,126 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:32,126 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:21:32,126 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:32,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash 102546425, now seen corresponding path program 1 times [2023-12-05 21:21:32,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242950321] [2023-12-05 21:21:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:32,150 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-05 21:21:32,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614472514] [2023-12-05 21:21:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:32,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:32,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:32,153 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 21:21:32,184 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 21:21:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:32,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-05 21:21:32,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:21:32,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-12-05 21:21:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:32,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:21:32,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:32,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242950321] [2023-12-05 21:21:32,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-05 21:21:32,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614472514] [2023-12-05 21:21:32,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614472514] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:32,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:32,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:21:32,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286780420] [2023-12-05 21:21:32,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:32,321 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:32,328 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 167 [2023-12-05 21:21:32,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 147 transitions, 659 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:32,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 167 [2023-12-05 21:21:32,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:32,403 INFO L124 PetriNetUnfolderBase]: 135/716 cut-off events. [2023-12-05 21:21:32,403 INFO L125 PetriNetUnfolderBase]: For 1862/1974 co-relation queries the response was YES. [2023-12-05 21:21:32,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1807 conditions, 716 events. 135/716 cut-off events. For 1862/1974 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3882 event pairs, 32 based on Foata normal form. 43/693 useless extension candidates. Maximal degree in co-relation 1332. Up to 174 conditions per place. [2023-12-05 21:21:32,407 INFO L140 encePairwiseOnDemand]: 163/167 looper letters, 19 selfloop transitions, 8 changer transitions 0/151 dead transitions. [2023-12-05 21:21:32,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 151 transitions, 773 flow [2023-12-05 21:21:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-12-05 21:21:32,408 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8862275449101796 [2023-12-05 21:21:32,408 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-12-05 21:21:32,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-12-05 21:21:32,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:32,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-12-05 21:21:32,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,413 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, 0 predicate places. [2023-12-05 21:21:32,413 INFO L500 AbstractCegarLoop]: Abstraction has has 150 places, 151 transitions, 773 flow [2023-12-05 21:21:32,414 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,414 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:32,414 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:32,422 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 21:21:32,621 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-12-05 21:21:32,622 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:32,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash -199805160, now seen corresponding path program 1 times [2023-12-05 21:21:32,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:32,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838982858] [2023-12-05 21:21:32,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:32,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:32,633 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-05 21:21:32,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245761129] [2023-12-05 21:21:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:32,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:32,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:32,635 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 21:21:32,660 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 21:21:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:32,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-05 21:21:32,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:21:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:32,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:21:32,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:32,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838982858] [2023-12-05 21:21:32,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-05 21:21:32,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245761129] [2023-12-05 21:21:32,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245761129] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:32,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:32,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:21:32,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378063886] [2023-12-05 21:21:32,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:32,743 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:21:32,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:21:32,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:21:32,744 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 167 [2023-12-05 21:21:32,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 151 transitions, 773 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:32,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 167 [2023-12-05 21:21:32,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:32,842 INFO L124 PetriNetUnfolderBase]: 172/991 cut-off events. [2023-12-05 21:21:32,842 INFO L125 PetriNetUnfolderBase]: For 2909/3070 co-relation queries the response was YES. [2023-12-05 21:21:32,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2647 conditions, 991 events. 172/991 cut-off events. For 2909/3070 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 5816 event pairs, 48 based on Foata normal form. 1/905 useless extension candidates. Maximal degree in co-relation 1863. Up to 238 conditions per place. [2023-12-05 21:21:32,848 INFO L140 encePairwiseOnDemand]: 162/167 looper letters, 36 selfloop transitions, 4 changer transitions 0/168 dead transitions. [2023-12-05 21:21:32,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 168 transitions, 1088 flow [2023-12-05 21:21:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:21:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:21:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-12-05 21:21:32,849 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9121756487025948 [2023-12-05 21:21:32,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-12-05 21:21:32,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-12-05 21:21:32,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:32,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-12-05 21:21:32,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 167.0) internal successors, (668), 4 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,851 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, 2 predicate places. [2023-12-05 21:21:32,851 INFO L500 AbstractCegarLoop]: Abstraction has has 152 places, 168 transitions, 1088 flow [2023-12-05 21:21:32,852 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:32,852 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:32,852 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:32,859 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 21:21:33,057 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,SelfDestructingSolverStorable6 [2023-12-05 21:21:33,058 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:33,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:33,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1548711902, now seen corresponding path program 1 times [2023-12-05 21:21:33,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:33,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559289310] [2023-12-05 21:21:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:33,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:33,083 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-05 21:21:33,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [285782581] [2023-12-05 21:21:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:33,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:33,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:33,084 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 21:21:33,086 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 21:21:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:33,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-05 21:21:33,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:21:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:33,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:21:33,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:33,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559289310] [2023-12-05 21:21:33,571 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-05 21:21:33,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285782581] [2023-12-05 21:21:33,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285782581] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:33,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:33,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-05 21:21:33,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364466481] [2023-12-05 21:21:33,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:33,572 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-05 21:21:33,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:33,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-05 21:21:33,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-05 21:21:33,573 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 167 [2023-12-05 21:21:33,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 168 transitions, 1088 flow. Second operand has 8 states, 8 states have (on average 116.625) internal successors, (933), 8 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:33,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:33,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 167 [2023-12-05 21:21:33,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:33,898 INFO L124 PetriNetUnfolderBase]: 391/1797 cut-off events. [2023-12-05 21:21:33,898 INFO L125 PetriNetUnfolderBase]: For 7729/7971 co-relation queries the response was YES. [2023-12-05 21:21:33,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5687 conditions, 1797 events. 391/1797 cut-off events. For 7729/7971 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 11615 event pairs, 74 based on Foata normal form. 9/1649 useless extension candidates. Maximal degree in co-relation 4744. Up to 472 conditions per place. [2023-12-05 21:21:33,910 INFO L140 encePairwiseOnDemand]: 158/167 looper letters, 130 selfloop transitions, 9 changer transitions 2/237 dead transitions. [2023-12-05 21:21:33,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 237 transitions, 2123 flow [2023-12-05 21:21:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-05 21:21:33,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-12-05 21:21:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1237 transitions. [2023-12-05 21:21:33,912 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7407185628742515 [2023-12-05 21:21:33,912 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1237 transitions. [2023-12-05 21:21:33,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1237 transitions. [2023-12-05 21:21:33,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:33,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1237 transitions. [2023-12-05 21:21:33,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.7) internal successors, (1237), 10 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:33,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 167.0) internal successors, (1837), 11 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:33,917 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 167.0) internal successors, (1837), 11 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:33,917 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, 11 predicate places. [2023-12-05 21:21:33,917 INFO L500 AbstractCegarLoop]: Abstraction has has 161 places, 237 transitions, 2123 flow [2023-12-05 21:21:33,917 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 116.625) internal successors, (933), 8 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:33,917 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:33,918 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:33,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-05 21:21:34,128 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:34,128 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:34,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash 681849975, now seen corresponding path program 1 times [2023-12-05 21:21:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:34,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650674065] [2023-12-05 21:21:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:34,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:34,146 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-05 21:21:34,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295452723] [2023-12-05 21:21:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:34,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:34,147 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 21:21:34,174 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 21:21:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:34,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:21:34,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:21:34,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:34,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:21:34,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:34,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650674065] [2023-12-05 21:21:34,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-05 21:21:34,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295452723] [2023-12-05 21:21:34,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295452723] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:34,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:34,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:21:34,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507774970] [2023-12-05 21:21:34,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:34,284 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:21:34,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:34,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:21:34,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:21:34,285 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 167 [2023-12-05 21:21:34,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 237 transitions, 2123 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:34,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:34,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 167 [2023-12-05 21:21:34,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:34,718 INFO L124 PetriNetUnfolderBase]: 1091/4043 cut-off events. [2023-12-05 21:21:34,718 INFO L125 PetriNetUnfolderBase]: For 31554/33120 co-relation queries the response was YES. [2023-12-05 21:21:34,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15308 conditions, 4043 events. 1091/4043 cut-off events. For 31554/33120 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 33312 event pairs, 241 based on Foata normal form. 5/3618 useless extension candidates. Maximal degree in co-relation 13692. Up to 1211 conditions per place. [2023-12-05 21:21:34,747 INFO L140 encePairwiseOnDemand]: 160/167 looper letters, 114 selfloop transitions, 3 changer transitions 21/298 dead transitions. [2023-12-05 21:21:34,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 298 transitions, 3286 flow [2023-12-05 21:21:34,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:21:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:21:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 727 transitions. [2023-12-05 21:21:34,749 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8706586826347306 [2023-12-05 21:21:34,749 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 727 transitions. [2023-12-05 21:21:34,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 727 transitions. [2023-12-05 21:21:34,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:34,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 727 transitions. [2023-12-05 21:21:34,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:34,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:34,752 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 167.0) internal successors, (1002), 6 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:34,752 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, 15 predicate places. [2023-12-05 21:21:34,752 INFO L500 AbstractCegarLoop]: Abstraction has has 165 places, 298 transitions, 3286 flow [2023-12-05 21:21:34,752 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:34,752 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:34,753 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:34,760 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 21:21:34,958 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:34,958 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:34,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:34,959 INFO L85 PathProgramCache]: Analyzing trace with hash -598585629, now seen corresponding path program 1 times [2023-12-05 21:21:34,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:34,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810805939] [2023-12-05 21:21:34,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:35,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-05 21:21:35,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396898710] [2023-12-05 21:21:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:35,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:35,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:35,024 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 21:21:35,027 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 21:21:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:35,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-05 21:21:35,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:21:35,299 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-05 21:21:35,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-12-05 21:21:35,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:21:35,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:21:35,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:21:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:35,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:21:38,842 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:38,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:38,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810805939] [2023-12-05 21:21:38,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-05 21:21:38,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396898710] [2023-12-05 21:21:38,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396898710] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:21:38,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-05 21:21:38,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2023-12-05 21:21:38,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945378194] [2023-12-05 21:21:38,843 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-05 21:21:38,843 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-05 21:21:38,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-05 21:21:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-12-05 21:21:38,845 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 167 [2023-12-05 21:21:38,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 298 transitions, 3286 flow. Second operand has 21 states, 21 states have (on average 108.28571428571429) internal successors, (2274), 21 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:38,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:38,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 167 [2023-12-05 21:21:38,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:39,622 INFO L124 PetriNetUnfolderBase]: 1054/3918 cut-off events. [2023-12-05 21:21:39,622 INFO L125 PetriNetUnfolderBase]: For 38432/39796 co-relation queries the response was YES. [2023-12-05 21:21:39,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16401 conditions, 3918 events. 1054/3918 cut-off events. For 38432/39796 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 30219 event pairs, 191 based on Foata normal form. 48/3609 useless extension candidates. Maximal degree in co-relation 14829. Up to 1163 conditions per place. [2023-12-05 21:21:39,651 INFO L140 encePairwiseOnDemand]: 152/167 looper letters, 163 selfloop transitions, 15 changer transitions 16/308 dead transitions. [2023-12-05 21:21:39,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 308 transitions, 3895 flow [2023-12-05 21:21:39,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-05 21:21:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-12-05 21:21:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1420 transitions. [2023-12-05 21:21:39,654 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.654076462459696 [2023-12-05 21:21:39,654 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1420 transitions. [2023-12-05 21:21:39,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1420 transitions. [2023-12-05 21:21:39,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:39,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1420 transitions. [2023-12-05 21:21:39,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 109.23076923076923) internal successors, (1420), 13 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:39,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 167.0) internal successors, (2338), 14 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:39,660 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 167.0) internal successors, (2338), 14 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:39,660 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, 22 predicate places. [2023-12-05 21:21:39,660 INFO L500 AbstractCegarLoop]: Abstraction has has 172 places, 308 transitions, 3895 flow [2023-12-05 21:21:39,661 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 108.28571428571429) internal successors, (2274), 21 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:39,661 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:39,661 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:39,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-05 21:21:39,868 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-05 21:21:39,868 INFO L425 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:39,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:39,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1318713657, now seen corresponding path program 1 times [2023-12-05 21:21:39,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:39,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320785031] [2023-12-05 21:21:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:39,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:39,881 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-05 21:21:39,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524026019] [2023-12-05 21:21:39,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:39,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:39,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:39,882 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 21:21:39,905 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 21:21:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:39,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:21:40,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:21:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:40,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:21:40,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:40,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320785031] [2023-12-05 21:21:40,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-05 21:21:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524026019] [2023-12-05 21:21:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524026019] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:21:40,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:21:40,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:21:40,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256717132] [2023-12-05 21:21:40,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:21:40,022 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-05 21:21:40,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:40,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-05 21:21:40,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-05 21:21:40,023 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 167 [2023-12-05 21:21:40,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 308 transitions, 3895 flow. Second operand has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:40,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:40,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 167 [2023-12-05 21:21:40,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:40,745 INFO L124 PetriNetUnfolderBase]: 1520/5080 cut-off events. [2023-12-05 21:21:40,745 INFO L125 PetriNetUnfolderBase]: For 82050/84037 co-relation queries the response was YES. [2023-12-05 21:21:40,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22937 conditions, 5080 events. 1520/5080 cut-off events. For 82050/84037 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 39145 event pairs, 497 based on Foata normal form. 98/4532 useless extension candidates. Maximal degree in co-relation 21621. Up to 1514 conditions per place. [2023-12-05 21:21:40,776 INFO L140 encePairwiseOnDemand]: 158/167 looper letters, 125 selfloop transitions, 10 changer transitions 45/348 dead transitions. [2023-12-05 21:21:40,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 348 transitions, 4922 flow [2023-12-05 21:21:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:21:40,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:21:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 875 transitions. [2023-12-05 21:21:40,778 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.873253493013972 [2023-12-05 21:21:40,778 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 875 transitions. [2023-12-05 21:21:40,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 875 transitions. [2023-12-05 21:21:40,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:40,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 875 transitions. [2023-12-05 21:21:40,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.83333333333334) internal successors, (875), 6 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:40,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 167.0) internal successors, (1169), 7 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:40,781 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 167.0) internal successors, (1169), 7 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:40,781 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, 27 predicate places. [2023-12-05 21:21:40,781 INFO L500 AbstractCegarLoop]: Abstraction has has 177 places, 348 transitions, 4922 flow [2023-12-05 21:21:40,782 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.8) internal successors, (699), 5 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:40,782 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:40,782 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:40,788 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 21:21:40,988 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:40,989 INFO L425 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:40,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1469655138, now seen corresponding path program 1 times [2023-12-05 21:21:40,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:40,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437606497] [2023-12-05 21:21:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:40,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:41,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-05 21:21:41,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762203309] [2023-12-05 21:21:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:41,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:41,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:41,004 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 21:21:41,032 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 21:21:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:21:41,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-05 21:21:41,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:21:41,346 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-05 21:21:41,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-05 21:21:41,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:21:41,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:21:41,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:21:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:41,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:21:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:21:43,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:43,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437606497] [2023-12-05 21:21:43,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-05 21:21:43,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762203309] [2023-12-05 21:21:43,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762203309] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:21:43,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-05 21:21:43,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2023-12-05 21:21:43,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256443080] [2023-12-05 21:21:43,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-05 21:21:43,428 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-05 21:21:43,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:43,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-05 21:21:43,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-12-05 21:21:43,429 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 167 [2023-12-05 21:21:43,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 348 transitions, 4922 flow. Second operand has 20 states, 20 states have (on average 110.35) internal successors, (2207), 20 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:43,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:43,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 167 [2023-12-05 21:21:43,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:44,887 INFO L124 PetriNetUnfolderBase]: 2082/6944 cut-off events. [2023-12-05 21:21:44,887 INFO L125 PetriNetUnfolderBase]: For 130903/132724 co-relation queries the response was YES. [2023-12-05 21:21:44,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33349 conditions, 6944 events. 2082/6944 cut-off events. For 130903/132724 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 52314 event pairs, 703 based on Foata normal form. 60/6093 useless extension candidates. Maximal degree in co-relation 31528. Up to 2016 conditions per place. [2023-12-05 21:21:44,974 INFO L140 encePairwiseOnDemand]: 157/167 looper letters, 227 selfloop transitions, 19 changer transitions 97/469 dead transitions. [2023-12-05 21:21:44,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 469 transitions, 7929 flow [2023-12-05 21:21:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-05 21:21:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-12-05 21:21:44,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2063 transitions. [2023-12-05 21:21:44,979 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6862940785096474 [2023-12-05 21:21:44,979 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2063 transitions. [2023-12-05 21:21:44,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2063 transitions. [2023-12-05 21:21:44,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:44,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2063 transitions. [2023-12-05 21:21:44,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 114.61111111111111) internal successors, (2063), 18 states have internal predecessors, (2063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:44,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:44,987 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:44,988 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, 44 predicate places. [2023-12-05 21:21:44,988 INFO L500 AbstractCegarLoop]: Abstraction has has 194 places, 469 transitions, 7929 flow [2023-12-05 21:21:44,988 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.35) internal successors, (2207), 20 states have internal predecessors, (2207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:44,988 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:21:44,989 INFO L233 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:44,994 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 21:21:45,194 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 21:21:45,194 INFO L425 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2023-12-05 21:21:45,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:21:45,195 INFO L85 PathProgramCache]: Analyzing trace with hash -286513602, now seen corresponding path program 2 times [2023-12-05 21:21:45,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:21:45,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121361533] [2023-12-05 21:21:45,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:21:45,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:21:45,221 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-05 21:21:45,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365513840] [2023-12-05 21:21:45,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:21:45,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:21:45,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:21:45,222 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 21:21:45,247 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 21:21:45,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:21:45,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:21:45,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-05 21:21:45,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:21:45,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:21:45,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:21:45,657 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-05 21:21:45,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-05 21:21:45,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-05 21:21:45,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:21:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 76 proven. 16 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-12-05 21:21:47,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:21:50,617 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2023-12-05 21:21:50,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:21:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121361533] [2023-12-05 21:21:50,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-05 21:21:50,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365513840] [2023-12-05 21:21:50,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365513840] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:21:50,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-05 21:21:50,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2023-12-05 21:21:50,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905268562] [2023-12-05 21:21:50,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-05 21:21:50,618 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-05 21:21:50,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:21:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-05 21:21:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-12-05 21:21:50,620 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 167 [2023-12-05 21:21:50,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 469 transitions, 7929 flow. Second operand has 22 states, 22 states have (on average 103.22727272727273) internal successors, (2271), 22 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:50,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:21:50,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 167 [2023-12-05 21:21:50,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:21:52,020 INFO L124 PetriNetUnfolderBase]: 2054/6771 cut-off events. [2023-12-05 21:21:52,020 INFO L125 PetriNetUnfolderBase]: For 154648/156900 co-relation queries the response was YES. [2023-12-05 21:21:52,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35316 conditions, 6771 events. 2054/6771 cut-off events. For 154648/156900 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 50923 event pairs, 704 based on Foata normal form. 82/5949 useless extension candidates. Maximal degree in co-relation 33357. Up to 1991 conditions per place. [2023-12-05 21:21:52,047 INFO L140 encePairwiseOnDemand]: 151/167 looper letters, 0 selfloop transitions, 0 changer transitions 486/486 dead transitions. [2023-12-05 21:21:52,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 486 transitions, 9039 flow [2023-12-05 21:21:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-05 21:21:52,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-12-05 21:21:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1855 transitions. [2023-12-05 21:21:52,050 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6170991350632069 [2023-12-05 21:21:52,050 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1855 transitions. [2023-12-05 21:21:52,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1855 transitions. [2023-12-05 21:21:52,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:21:52,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1855 transitions. [2023-12-05 21:21:52,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 103.05555555555556) internal successors, (1855), 18 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:52,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:52,058 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 167.0) internal successors, (3173), 19 states have internal predecessors, (3173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:52,058 INFO L308 CegarLoopForPetriNet]: 150 programPoint places, 60 predicate places. [2023-12-05 21:21:52,058 INFO L500 AbstractCegarLoop]: Abstraction has has 210 places, 486 transitions, 9039 flow [2023-12-05 21:21:52,059 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 103.22727272727273) internal successors, (2271), 22 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:21:52,064 INFO L161 wickiGriesTestDumper]: Dumping Owicki-Gries test to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/circular_buffer_bad.i_BEv2_AllErrorsAtOnce [2023-12-05 21:21:52,111 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 18 remaining) [2023-12-05 21:21:52,112 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 18 remaining) [2023-12-05 21:21:52,113 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 18 remaining) [2023-12-05 21:21:52,113 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 18 remaining) [2023-12-05 21:21:52,113 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 18 remaining) [2023-12-05 21:21:52,113 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 18 remaining) [2023-12-05 21:21:52,113 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 18 remaining) [2023-12-05 21:21:52,113 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 18 remaining) [2023-12-05 21:21:52,113 INFO L810 garLoopResultBuilder]: Registering result SAFE for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 18 remaining) [2023-12-05 21:21:52,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-05 21:21:52,320 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 21:21:52,321 INFO L457 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:21:52,325 INFO L222 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-12-05 21:21:52,325 INFO L172 ceAbstractionStarter]: Computing trace abstraction results [2023-12-05 21:21:52,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:21:52 BasicIcfg [2023-12-05 21:21:52,330 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-05 21:21:52,330 INFO L158 Benchmark]: Toolchain (without parser) took 23199.26ms. Allocated memory was 194.0MB in the beginning and 1.2GB in the end (delta: 1.0GB). Free memory was 130.0MB in the beginning and 824.0MB in the end (delta: -694.0MB). Peak memory consumption was 847.9MB. Max. memory is 8.0GB. [2023-12-05 21:21:52,331 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 145.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-05 21:21:52,331 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.95ms. Allocated memory was 194.0MB in the beginning and 255.9MB in the end (delta: 61.9MB). Free memory was 129.7MB in the beginning and 216.7MB in the end (delta: -87.0MB). Peak memory consumption was 21.8MB. Max. memory is 8.0GB. [2023-12-05 21:21:52,331 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.46ms. Allocated memory is still 255.9MB. Free memory was 216.7MB in the beginning and 214.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:21:52,331 INFO L158 Benchmark]: Boogie Preprocessor took 18.72ms. Allocated memory is still 255.9MB. Free memory was 214.6MB in the beginning and 212.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-05 21:21:52,332 INFO L158 Benchmark]: RCFGBuilder took 425.41ms. Allocated memory is still 255.9MB. Free memory was 212.5MB in the beginning and 191.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2023-12-05 21:21:52,332 INFO L158 Benchmark]: TraceAbstraction took 22341.25ms. Allocated memory was 255.9MB in the beginning and 1.2GB in the end (delta: 959.4MB). Free memory was 190.5MB in the beginning and 824.0MB in the end (delta: -633.5MB). Peak memory consumption was 845.0MB. Max. memory is 8.0GB. [2023-12-05 21:21:52,333 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 194.0MB. Free memory is still 145.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 369.95ms. Allocated memory was 194.0MB in the beginning and 255.9MB in the end (delta: 61.9MB). Free memory was 129.7MB in the beginning and 216.7MB in the end (delta: -87.0MB). Peak memory consumption was 21.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.46ms. Allocated memory is still 255.9MB. Free memory was 216.7MB in the beginning and 214.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.72ms. Allocated memory is still 255.9MB. Free memory was 214.6MB in the beginning and 212.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 425.41ms. Allocated memory is still 255.9MB. Free memory was 212.5MB in the beginning and 191.5MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 22341.25ms. Allocated memory was 255.9MB in the beginning and 1.2GB in the end (delta: 959.4MB). Free memory was 190.5MB in the beginning and 824.0MB in the end (delta: -633.5MB). Peak memory consumption was 845.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 239 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 22.2s, OverallIterations: 13, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1299 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1299 mSDsluCounter, 437 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 276 mSDsCounter, 74 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1647 IncrementalHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 74 mSolverCounterUnsat, 161 mSDtfsCounter, 1647 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1598 GetRequests, 1470 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9039occurred in iteration=13, InterpolantAutomatonStates: 95, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 1247 NumberOfCodeBlocks, 1048 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 1769 ConstructedInterpolants, 64 QuantifiedInterpolants, 36170 SizeOfPredicates, 40 NumberOfNonLiveVariables, 2317 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 16 InterpolantComputations, 10 PerfectInterpolantSequences, 779/971 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 12 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-05 21:21:52,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...