/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:17:09,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:17:09,756 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:17:09,784 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:17:09,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:17:09,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:17:09,787 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:17:09,787 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:17:09,788 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:17:09,792 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:17:09,792 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:17:09,793 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:17:09,793 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:17:09,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:17:09,794 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:17:09,794 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:17:09,794 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:17:09,794 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:17:09,794 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:17:09,794 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:17:09,795 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:17:09,795 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:17:09,795 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:17:09,796 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:17:09,796 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:17:09,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:09,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:17:09,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:17:09,796 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:17:09,796 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:17:09,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:17:09,797 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:17:09,797 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:17:09,798 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:17:09,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:17:09,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:17:09,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:17:09,991 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:17:09,991 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:17:09,992 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-12-05 21:17:11,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:17:11,264 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:17:11,265 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_74-tricky_address1_racefree.i [2023-12-05 21:17:11,293 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da6bcf560/1ffe49045d6541fbb33d30f5a3808504/FLAG2958e04a4 [2023-12-05 21:17:11,303 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da6bcf560/1ffe49045d6541fbb33d30f5a3808504 [2023-12-05 21:17:11,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:17:11,306 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:17:11,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:11,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:17:11,310 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:17:11,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,311 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ee7342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11, skipping insertion in model container [2023-12-05 21:17:11,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,344 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:17:11,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:11,736 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:17:11,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:17:11,840 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:17:11,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11 WrapperNode [2023-12-05 21:17:11,840 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:17:11,841 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:11,842 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:17:11,842 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:17:11,846 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,896 INFO L138 Inliner]: procedures = 271, calls = 50, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 222 [2023-12-05 21:17:11,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:17:11,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:17:11,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:17:11,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:17:11,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,907 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,914 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,929 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,934 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:17:11,934 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:17:11,935 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:17:11,935 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:17:11,935 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (1/1) ... [2023-12-05 21:17:11,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:17:12,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:12,028 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:17:12,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:17:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:17:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:17:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-05 21:17:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:17:12,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:17:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-05 21:17:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:17:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-12-05 21:17:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-12-05 21:17:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:17:12,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:17:12,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:17:12,052 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:17:12,161 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:17:12,162 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:17:12,413 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:17:12,440 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:17:12,440 INFO L309 CfgBuilder]: Removed 23 assume(true) statements. [2023-12-05 21:17:12,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:12 BoogieIcfgContainer [2023-12-05 21:17:12,441 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:17:12,443 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:17:12,443 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:17:12,445 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:17:12,445 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:17:11" (1/3) ... [2023-12-05 21:17:12,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395b42e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:12, skipping insertion in model container [2023-12-05 21:17:12,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:17:11" (2/3) ... [2023-12-05 21:17:12,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@395b42e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:17:12, skipping insertion in model container [2023-12-05 21:17:12,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:17:12" (3/3) ... [2023-12-05 21:17:12,447 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_74-tricky_address1_racefree.i [2023-12-05 21:17:12,459 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:17:12,460 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2023-12-05 21:17:12,460 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:17:12,511 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-12-05 21:17:12,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 240 transitions, 487 flow [2023-12-05 21:17:12,623 INFO L124 PetriNetUnfolderBase]: 48/337 cut-off events. [2023-12-05 21:17:12,623 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-05 21:17:12,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 337 events. 48/337 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1359 event pairs, 0 based on Foata normal form. 0/248 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2023-12-05 21:17:12,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 210 places, 240 transitions, 487 flow [2023-12-05 21:17:12,644 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 240 transitions, 487 flow [2023-12-05 21:17:12,651 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:12,657 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;@42503c86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:12,657 INFO L363 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2023-12-05 21:17:12,663 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:12,663 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:17:12,663 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:12,663 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:12,664 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:12,664 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:12,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1791171730, now seen corresponding path program 1 times [2023-12-05 21:17:12,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:12,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27348872] [2023-12-05 21:17:12,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:12,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:12,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:12,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27348872] [2023-12-05 21:17:12,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27348872] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:12,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:12,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848145804] [2023-12-05 21:17:12,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:12,910 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:12,937 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 240 [2023-12-05 21:17:12,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 240 transitions, 487 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:12,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:12,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 240 [2023-12-05 21:17:12,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:13,157 INFO L124 PetriNetUnfolderBase]: 85/937 cut-off events. [2023-12-05 21:17:13,157 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-12-05 21:17:13,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 937 events. 85/937 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6326 event pairs, 72 based on Foata normal form. 209/973 useless extension candidates. Maximal degree in co-relation 968. Up to 181 conditions per place. [2023-12-05 21:17:13,168 INFO L140 encePairwiseOnDemand]: 208/240 looper letters, 29 selfloop transitions, 2 changer transitions 1/209 dead transitions. [2023-12-05 21:17:13,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 209 transitions, 487 flow [2023-12-05 21:17:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:13,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 608 transitions. [2023-12-05 21:17:13,184 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8444444444444444 [2023-12-05 21:17:13,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 608 transitions. [2023-12-05 21:17:13,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 608 transitions. [2023-12-05 21:17:13,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:13,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 608 transitions. [2023-12-05 21:17:13,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,196 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,199 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, -4 predicate places. [2023-12-05 21:17:13,199 INFO L500 AbstractCegarLoop]: Abstraction has has 206 places, 209 transitions, 487 flow [2023-12-05 21:17:13,200 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,200 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:13,200 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:13,200 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:17:13,200 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:13,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:13,201 INFO L85 PathProgramCache]: Analyzing trace with hash -767972853, now seen corresponding path program 1 times [2023-12-05 21:17:13,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:13,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071004606] [2023-12-05 21:17:13,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:13,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:13,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071004606] [2023-12-05 21:17:13,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071004606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:13,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459084503] [2023-12-05 21:17:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:13,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:13,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:13,382 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:13,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:17:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:13,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:13,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:13,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:13,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459084503] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:13,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:13,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:13,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104317146] [2023-12-05 21:17:13,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:13,575 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:13,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:13,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:13,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:13,581 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2023-12-05 21:17:13,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 209 transitions, 487 flow. Second operand has 10 states, 10 states have (on average 183.1) internal successors, (1831), 10 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:13,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2023-12-05 21:17:13,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:13,788 INFO L124 PetriNetUnfolderBase]: 85/944 cut-off events. [2023-12-05 21:17:13,788 INFO L125 PetriNetUnfolderBase]: For 102/106 co-relation queries the response was YES. [2023-12-05 21:17:13,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1332 conditions, 944 events. 85/944 cut-off events. For 102/106 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 6306 event pairs, 72 based on Foata normal form. 0/771 useless extension candidates. Maximal degree in co-relation 1129. Up to 186 conditions per place. [2023-12-05 21:17:13,795 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 30 selfloop transitions, 9 changer transitions 1/216 dead transitions. [2023-12-05 21:17:13,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 216 transitions, 589 flow [2023-12-05 21:17:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:13,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:13,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1670 transitions. [2023-12-05 21:17:13,800 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7731481481481481 [2023-12-05 21:17:13,800 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1670 transitions. [2023-12-05 21:17:13,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1670 transitions. [2023-12-05 21:17:13,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:13,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1670 transitions. [2023-12-05 21:17:13,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.55555555555554) internal successors, (1670), 9 states have internal predecessors, (1670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,809 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 240.0) internal successors, (2400), 10 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,810 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 4 predicate places. [2023-12-05 21:17:13,811 INFO L500 AbstractCegarLoop]: Abstraction has has 214 places, 216 transitions, 589 flow [2023-12-05 21:17:13,812 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 183.1) internal successors, (1831), 10 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:13,812 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:13,813 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:13,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:14,021 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:14,021 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:14,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:14,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1565498389, now seen corresponding path program 2 times [2023-12-05 21:17:14,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:14,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302921394] [2023-12-05 21:17:14,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:14,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:14,128 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:14,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:14,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302921394] [2023-12-05 21:17:14,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302921394] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:14,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:14,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:14,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14094618] [2023-12-05 21:17:14,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:14,135 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:14,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:14,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:14,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:14,137 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 240 [2023-12-05 21:17:14,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 216 transitions, 589 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:14,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 240 [2023-12-05 21:17:14,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:14,406 INFO L124 PetriNetUnfolderBase]: 473/2074 cut-off events. [2023-12-05 21:17:14,406 INFO L125 PetriNetUnfolderBase]: For 939/947 co-relation queries the response was YES. [2023-12-05 21:17:14,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3876 conditions, 2074 events. 473/2074 cut-off events. For 939/947 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 17859 event pairs, 396 based on Foata normal form. 0/1734 useless extension candidates. Maximal degree in co-relation 3622. Up to 857 conditions per place. [2023-12-05 21:17:14,416 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 65 selfloop transitions, 2 changer transitions 4/232 dead transitions. [2023-12-05 21:17:14,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 232 transitions, 793 flow [2023-12-05 21:17:14,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:14,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 537 transitions. [2023-12-05 21:17:14,418 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7458333333333333 [2023-12-05 21:17:14,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 537 transitions. [2023-12-05 21:17:14,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 537 transitions. [2023-12-05 21:17:14,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:14,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 537 transitions. [2023-12-05 21:17:14,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,422 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 4 predicate places. [2023-12-05 21:17:14,422 INFO L500 AbstractCegarLoop]: Abstraction has has 214 places, 232 transitions, 793 flow [2023-12-05 21:17:14,423 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,423 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:14,423 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:14,423 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:17:14,423 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:14,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:14,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1565498388, now seen corresponding path program 1 times [2023-12-05 21:17:14,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:14,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778511133] [2023-12-05 21:17:14,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:14,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:14,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778511133] [2023-12-05 21:17:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778511133] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:14,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352361037] [2023-12-05 21:17:14,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:14,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:14,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:14,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:14,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:17:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:14,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:14,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:14,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:14,795 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:14,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352361037] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:14,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:14,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807316868] [2023-12-05 21:17:14,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:14,797 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:14,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:14,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:14,800 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2023-12-05 21:17:14,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 232 transitions, 793 flow. Second operand has 18 states, 18 states have (on average 183.27777777777777) internal successors, (3299), 18 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:14,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:14,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2023-12-05 21:17:14,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:15,227 INFO L124 PetriNetUnfolderBase]: 473/2094 cut-off events. [2023-12-05 21:17:15,227 INFO L125 PetriNetUnfolderBase]: For 1876/1888 co-relation queries the response was YES. [2023-12-05 21:17:15,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 2094 events. 473/2094 cut-off events. For 1876/1888 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 17878 event pairs, 396 based on Foata normal form. 0/1754 useless extension candidates. Maximal degree in co-relation 4001. Up to 857 conditions per place. [2023-12-05 21:17:15,239 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 44 selfloop transitions, 21 changer transitions 4/252 dead transitions. [2023-12-05 21:17:15,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 252 transitions, 1039 flow [2023-12-05 21:17:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:15,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3864 transitions. [2023-12-05 21:17:15,247 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7666666666666667 [2023-12-05 21:17:15,247 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3864 transitions. [2023-12-05 21:17:15,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3864 transitions. [2023-12-05 21:17:15,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:15,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3864 transitions. [2023-12-05 21:17:15,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 184.0) internal successors, (3864), 21 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 240.0) internal successors, (5280), 22 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,265 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 240.0) internal successors, (5280), 22 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,267 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 24 predicate places. [2023-12-05 21:17:15,268 INFO L500 AbstractCegarLoop]: Abstraction has has 234 places, 252 transitions, 1039 flow [2023-12-05 21:17:15,269 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 183.27777777777777) internal successors, (3299), 18 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,269 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:15,269 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:15,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:15,475 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-05 21:17:15,476 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:15,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash -307802196, now seen corresponding path program 2 times [2023-12-05 21:17:15,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:15,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454569648] [2023-12-05 21:17:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:15,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:15,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:15,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:15,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454569648] [2023-12-05 21:17:15,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454569648] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:15,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241077565] [2023-12-05 21:17:15,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:15,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:15,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:15,727 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:15,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-05 21:17:15,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:17:15,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:15,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-05 21:17:15,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:15,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:17:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:15,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:15,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241077565] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:15,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:15,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2023-12-05 21:17:15,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067660063] [2023-12-05 21:17:15,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:15,903 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:15,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:15,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:15,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-12-05 21:17:15,904 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 240 [2023-12-05 21:17:15,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 252 transitions, 1039 flow. Second operand has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:15,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:15,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 240 [2023-12-05 21:17:15,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:16,301 INFO L124 PetriNetUnfolderBase]: 752/2615 cut-off events. [2023-12-05 21:17:16,301 INFO L125 PetriNetUnfolderBase]: For 4232/4447 co-relation queries the response was YES. [2023-12-05 21:17:16,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6786 conditions, 2615 events. 752/2615 cut-off events. For 4232/4447 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 22561 event pairs, 648 based on Foata normal form. 0/2397 useless extension candidates. Maximal degree in co-relation 6513. Up to 1159 conditions per place. [2023-12-05 21:17:16,317 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 98 selfloop transitions, 4 changer transitions 7/290 dead transitions. [2023-12-05 21:17:16,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 290 transitions, 1481 flow [2023-12-05 21:17:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:16,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 697 transitions. [2023-12-05 21:17:16,319 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7260416666666667 [2023-12-05 21:17:16,319 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 697 transitions. [2023-12-05 21:17:16,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 697 transitions. [2023-12-05 21:17:16,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:16,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 697 transitions. [2023-12-05 21:17:16,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 174.25) internal successors, (697), 4 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,322 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,324 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 27 predicate places. [2023-12-05 21:17:16,324 INFO L500 AbstractCegarLoop]: Abstraction has has 237 places, 290 transitions, 1481 flow [2023-12-05 21:17:16,324 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:16,324 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:16,325 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:16,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-05 21:17:16,529 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:16,530 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:16,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:16,530 INFO L85 PathProgramCache]: Analyzing trace with hash 95300377, now seen corresponding path program 1 times [2023-12-05 21:17:16,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:16,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216529158] [2023-12-05 21:17:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:16,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216529158] [2023-12-05 21:17:16,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216529158] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:16,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874435188] [2023-12-05 21:17:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:16,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:16,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:16,754 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:16,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-05 21:17:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:16,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:16,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:16,882 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:16,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:17,028 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:17,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874435188] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:17,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:17,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:17,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051981475] [2023-12-05 21:17:17,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:17,030 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:17,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:17,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:17,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:17,033 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 240 [2023-12-05 21:17:17,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 290 transitions, 1481 flow. Second operand has 23 states, 23 states have (on average 183.47826086956522) internal successors, (4220), 23 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:17,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 240 [2023-12-05 21:17:17,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:17,520 INFO L124 PetriNetUnfolderBase]: 752/2614 cut-off events. [2023-12-05 21:17:17,520 INFO L125 PetriNetUnfolderBase]: For 6209/6310 co-relation queries the response was YES. [2023-12-05 21:17:17,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7389 conditions, 2614 events. 752/2614 cut-off events. For 6209/6310 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 22467 event pairs, 532 based on Foata normal form. 0/2411 useless extension candidates. Maximal degree in co-relation 7000. Up to 1159 conditions per place. [2023-12-05 21:17:17,537 INFO L140 encePairwiseOnDemand]: 234/240 looper letters, 64 selfloop transitions, 30 changer transitions 7/305 dead transitions. [2023-12-05 21:17:17,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 305 transitions, 1791 flow [2023-12-05 21:17:17,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:17:17,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:17:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5507 transitions. [2023-12-05 21:17:17,545 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7648611111111111 [2023-12-05 21:17:17,545 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5507 transitions. [2023-12-05 21:17:17,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5507 transitions. [2023-12-05 21:17:17,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:17,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5507 transitions. [2023-12-05 21:17:17,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 183.56666666666666) internal successors, (5507), 30 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 240.0) internal successors, (7440), 31 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,566 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 240.0) internal successors, (7440), 31 states have internal predecessors, (7440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,566 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 56 predicate places. [2023-12-05 21:17:17,566 INFO L500 AbstractCegarLoop]: Abstraction has has 266 places, 305 transitions, 1791 flow [2023-12-05 21:17:17,568 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 183.47826086956522) internal successors, (4220), 23 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:17,568 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:17,568 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:17,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:17,772 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:17,773 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:17,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash 223007164, now seen corresponding path program 2 times [2023-12-05 21:17:17,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:17,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769021393] [2023-12-05 21:17:17,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:17,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:17,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:17,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769021393] [2023-12-05 21:17:17,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769021393] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:17,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179915740] [2023-12-05 21:17:17,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:17,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:17,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:17,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-05 21:17:18,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:17:18,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:18,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:17:18,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:18,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:17:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:18,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:18,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179915740] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:18,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:18,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:17:18,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635361810] [2023-12-05 21:17:18,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:18,143 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:17:18,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:18,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:17:18,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:17:18,145 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 240 [2023-12-05 21:17:18,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 305 transitions, 1791 flow. Second operand has 7 states, 7 states have (on average 151.14285714285714) internal successors, (1058), 7 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:18,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 240 [2023-12-05 21:17:18,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:18,695 INFO L124 PetriNetUnfolderBase]: 746/2602 cut-off events. [2023-12-05 21:17:18,696 INFO L125 PetriNetUnfolderBase]: For 8436/8783 co-relation queries the response was YES. [2023-12-05 21:17:18,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8626 conditions, 2602 events. 746/2602 cut-off events. For 8436/8783 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 22463 event pairs, 157 based on Foata normal form. 15/2452 useless extension candidates. Maximal degree in co-relation 8220. Up to 1135 conditions per place. [2023-12-05 21:17:18,714 INFO L140 encePairwiseOnDemand]: 231/240 looper letters, 166 selfloop transitions, 8 changer transitions 7/376 dead transitions. [2023-12-05 21:17:18,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 376 transitions, 2793 flow [2023-12-05 21:17:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-05 21:17:18,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-12-05 21:17:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1360 transitions. [2023-12-05 21:17:18,717 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2023-12-05 21:17:18,717 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1360 transitions. [2023-12-05 21:17:18,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1360 transitions. [2023-12-05 21:17:18,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:18,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1360 transitions. [2023-12-05 21:17:18,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 170.0) internal successors, (1360), 8 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 240.0) internal successors, (2160), 9 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,723 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 240.0) internal successors, (2160), 9 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,723 INFO L308 CegarLoopForPetriNet]: 210 programPoint places, 62 predicate places. [2023-12-05 21:17:18,723 INFO L500 AbstractCegarLoop]: Abstraction has has 272 places, 376 transitions, 2793 flow [2023-12-05 21:17:18,724 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 151.14285714285714) internal successors, (1058), 7 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:18,724 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:18,724 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:18,731 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 21:17:18,929 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:18,931 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2023-12-05 21:17:18,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:18,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1676711805, now seen corresponding path program 1 times [2023-12-05 21:17:18,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:18,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774544017] [2023-12-05 21:17:18,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:18,954 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:17:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:17:18,981 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:17:18,981 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:17:18,982 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (34 of 35 remaining) [2023-12-05 21:17:18,983 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 35 remaining) [2023-12-05 21:17:18,984 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 35 remaining) [2023-12-05 21:17:18,984 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 35 remaining) [2023-12-05 21:17:18,984 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 35 remaining) [2023-12-05 21:17:18,984 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 35 remaining) [2023-12-05 21:17:18,984 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 35 remaining) [2023-12-05 21:17:18,984 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 35 remaining) [2023-12-05 21:17:18,984 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 35 remaining) [2023-12-05 21:17:18,984 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 35 remaining) [2023-12-05 21:17:18,985 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 35 remaining) [2023-12-05 21:17:18,986 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 35 remaining) [2023-12-05 21:17:18,987 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 35 remaining) [2023-12-05 21:17:18,987 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 35 remaining) [2023-12-05 21:17:18,987 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 35 remaining) [2023-12-05 21:17:18,987 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 35 remaining) [2023-12-05 21:17:18,987 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 35 remaining) [2023-12-05 21:17:18,987 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 35 remaining) [2023-12-05 21:17:18,987 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:17:18,988 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2023-12-05 21:17:18,990 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:17:18,990 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:17:19,016 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-12-05 21:17:19,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 332 transitions, 680 flow [2023-12-05 21:17:19,069 INFO L124 PetriNetUnfolderBase]: 80/554 cut-off events. [2023-12-05 21:17:19,069 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-12-05 21:17:19,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 554 events. 80/554 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2661 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 339. Up to 12 conditions per place. [2023-12-05 21:17:19,076 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 332 transitions, 680 flow [2023-12-05 21:17:19,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 332 transitions, 680 flow [2023-12-05 21:17:19,083 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:17:19,083 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;@42503c86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:17:19,084 INFO L363 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-12-05 21:17:19,086 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:17:19,086 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:17:19,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:17:19,086 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:19,086 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:19,086 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:19,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:19,087 INFO L85 PathProgramCache]: Analyzing trace with hash -328681030, now seen corresponding path program 1 times [2023-12-05 21:17:19,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:19,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072977023] [2023-12-05 21:17:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:19,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:19,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:19,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:19,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072977023] [2023-12-05 21:17:19,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072977023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:19,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:19,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:17:19,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448957637] [2023-12-05 21:17:19,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:19,105 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:19,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:19,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:19,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:19,106 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 332 [2023-12-05 21:17:19,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 332 transitions, 680 flow. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:19,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:19,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 332 [2023-12-05 21:17:19,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:20,060 INFO L124 PetriNetUnfolderBase]: 1577/9160 cut-off events. [2023-12-05 21:17:20,060 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2023-12-05 21:17:20,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11627 conditions, 9160 events. 1577/9160 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 106880 event pairs, 1464 based on Foata normal form. 2921/10503 useless extension candidates. Maximal degree in co-relation 1347. Up to 2411 conditions per place. [2023-12-05 21:17:20,129 INFO L140 encePairwiseOnDemand]: 287/332 looper letters, 39 selfloop transitions, 2 changer transitions 1/285 dead transitions. [2023-12-05 21:17:20,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 285 transitions, 668 flow [2023-12-05 21:17:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 835 transitions. [2023-12-05 21:17:20,133 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8383534136546185 [2023-12-05 21:17:20,133 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 835 transitions. [2023-12-05 21:17:20,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 835 transitions. [2023-12-05 21:17:20,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:20,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 835 transitions. [2023-12-05 21:17:20,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.3333333333333) internal successors, (835), 3 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:20,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:20,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:20,138 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, -7 predicate places. [2023-12-05 21:17:20,138 INFO L500 AbstractCegarLoop]: Abstraction has has 282 places, 285 transitions, 668 flow [2023-12-05 21:17:20,138 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:20,138 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:20,138 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:20,138 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:17:20,138 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:20,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:20,139 INFO L85 PathProgramCache]: Analyzing trace with hash -6925941, now seen corresponding path program 1 times [2023-12-05 21:17:20,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:20,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726783275] [2023-12-05 21:17:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:20,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:20,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:20,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726783275] [2023-12-05 21:17:20,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726783275] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:20,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498325013] [2023-12-05 21:17:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:20,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:20,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:20,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:20,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-05 21:17:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:20,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:17:20,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:20,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:20,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498325013] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:20,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:20,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:17:20,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482186950] [2023-12-05 21:17:20,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:20,309 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:17:20,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:20,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:17:20,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:17:20,312 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 332 [2023-12-05 21:17:20,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 285 transitions, 668 flow. Second operand has 10 states, 10 states have (on average 251.1) internal successors, (2511), 10 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:20,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:20,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 332 [2023-12-05 21:17:20,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:21,350 INFO L124 PetriNetUnfolderBase]: 1577/9167 cut-off events. [2023-12-05 21:17:21,351 INFO L125 PetriNetUnfolderBase]: For 1012/1056 co-relation queries the response was YES. [2023-12-05 21:17:21,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14062 conditions, 9167 events. 1577/9167 cut-off events. For 1012/1056 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 106827 event pairs, 1464 based on Foata normal form. 0/7589 useless extension candidates. Maximal degree in co-relation 1691. Up to 2416 conditions per place. [2023-12-05 21:17:21,432 INFO L140 encePairwiseOnDemand]: 326/332 looper letters, 40 selfloop transitions, 9 changer transitions 1/292 dead transitions. [2023-12-05 21:17:21,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 292 transitions, 790 flow [2023-12-05 21:17:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:17:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:17:21,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2292 transitions. [2023-12-05 21:17:21,436 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7670682730923695 [2023-12-05 21:17:21,436 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2292 transitions. [2023-12-05 21:17:21,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2292 transitions. [2023-12-05 21:17:21,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:21,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2292 transitions. [2023-12-05 21:17:21,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 254.66666666666666) internal successors, (2292), 9 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,445 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,446 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2023-12-05 21:17:21,446 INFO L500 AbstractCegarLoop]: Abstraction has has 290 places, 292 transitions, 790 flow [2023-12-05 21:17:21,446 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 251.1) internal successors, (2511), 10 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,447 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:21,447 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:21,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-05 21:17:21,654 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:21,655 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:21,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:21,655 INFO L85 PathProgramCache]: Analyzing trace with hash 604420843, now seen corresponding path program 2 times [2023-12-05 21:17:21,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:21,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569245258] [2023-12-05 21:17:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:21,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-05 21:17:21,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:21,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569245258] [2023-12-05 21:17:21,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569245258] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:21,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:17:21,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:17:21,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340848036] [2023-12-05 21:17:21,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:21,685 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:17:21,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:21,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:17:21,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:17:21,687 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 332 [2023-12-05 21:17:21,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 292 transitions, 790 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:21,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:21,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 332 [2023-12-05 21:17:21,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:26,789 INFO L124 PetriNetUnfolderBase]: 18441/48352 cut-off events. [2023-12-05 21:17:26,790 INFO L125 PetriNetUnfolderBase]: For 26440/26612 co-relation queries the response was YES. [2023-12-05 21:17:26,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99911 conditions, 48352 events. 18441/48352 cut-off events. For 26440/26612 co-relation queries the response was YES. Maximal size of possible extension queue 1694. Compared 617491 event pairs, 15858 based on Foata normal form. 0/39255 useless extension candidates. Maximal degree in co-relation 7599. Up to 24699 conditions per place. [2023-12-05 21:17:27,196 INFO L140 encePairwiseOnDemand]: 328/332 looper letters, 106 selfloop transitions, 2 changer transitions 1/326 dead transitions. [2023-12-05 21:17:27,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 326 transitions, 1138 flow [2023-12-05 21:17:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:17:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:17:27,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 749 transitions. [2023-12-05 21:17:27,198 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7520080321285141 [2023-12-05 21:17:27,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 749 transitions. [2023-12-05 21:17:27,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 749 transitions. [2023-12-05 21:17:27,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:27,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 749 transitions. [2023-12-05 21:17:27,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.66666666666666) internal successors, (749), 3 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:27,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:27,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 332.0) internal successors, (1328), 4 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:27,202 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 1 predicate places. [2023-12-05 21:17:27,203 INFO L500 AbstractCegarLoop]: Abstraction has has 290 places, 326 transitions, 1138 flow [2023-12-05 21:17:27,203 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:27,203 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:27,203 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:27,203 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:17:27,203 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:27,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:27,204 INFO L85 PathProgramCache]: Analyzing trace with hash 604420844, now seen corresponding path program 1 times [2023-12-05 21:17:27,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:27,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240324545] [2023-12-05 21:17:27,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:27,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:27,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:27,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240324545] [2023-12-05 21:17:27,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240324545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:27,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769140459] [2023-12-05 21:17:27,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:27,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:27,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:27,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:27,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-05 21:17:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:27,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-05 21:17:27,340 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:27,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:27,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769140459] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:27,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:27,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-12-05 21:17:27,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283719902] [2023-12-05 21:17:27,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:27,429 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-05 21:17:27,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-05 21:17:27,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-12-05 21:17:27,432 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 332 [2023-12-05 21:17:27,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 326 transitions, 1138 flow. Second operand has 18 states, 18 states have (on average 251.27777777777777) internal successors, (4523), 18 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:27,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:27,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 332 [2023-12-05 21:17:27,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:33,228 INFO L124 PetriNetUnfolderBase]: 18441/48372 cut-off events. [2023-12-05 21:17:33,228 INFO L125 PetriNetUnfolderBase]: For 52401/52659 co-relation queries the response was YES. [2023-12-05 21:17:33,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111684 conditions, 48372 events. 18441/48372 cut-off events. For 52401/52659 co-relation queries the response was YES. Maximal size of possible extension queue 1706. Compared 617234 event pairs, 15858 based on Foata normal form. 0/39275 useless extension candidates. Maximal degree in co-relation 8969. Up to 24699 conditions per place. [2023-12-05 21:17:33,658 INFO L140 encePairwiseOnDemand]: 326/332 looper letters, 64 selfloop transitions, 21 changer transitions 1/346 dead transitions. [2023-12-05 21:17:33,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 346 transitions, 1420 flow [2023-12-05 21:17:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-05 21:17:33,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-12-05 21:17:33,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5302 transitions. [2023-12-05 21:17:33,666 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7604704532415376 [2023-12-05 21:17:33,666 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5302 transitions. [2023-12-05 21:17:33,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5302 transitions. [2023-12-05 21:17:33,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:33,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5302 transitions. [2023-12-05 21:17:33,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 252.47619047619048) internal successors, (5302), 21 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:33,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 332.0) internal successors, (7304), 22 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:33,682 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 332.0) internal successors, (7304), 22 states have internal predecessors, (7304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:33,683 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 21 predicate places. [2023-12-05 21:17:33,683 INFO L500 AbstractCegarLoop]: Abstraction has has 310 places, 346 transitions, 1420 flow [2023-12-05 21:17:33,684 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 251.27777777777777) internal successors, (4523), 18 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:33,684 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:33,684 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:33,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-05 21:17:33,888 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:33,888 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:33,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:33,889 INFO L85 PathProgramCache]: Analyzing trace with hash 571008428, now seen corresponding path program 2 times [2023-12-05 21:17:33,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:33,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734342981] [2023-12-05 21:17:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:33,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:34,060 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:17:34,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734342981] [2023-12-05 21:17:34,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734342981] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:34,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340987201] [2023-12-05 21:17:34,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:34,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:34,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:34,062 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:34,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-05 21:17:34,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-05 21:17:34,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:34,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-05 21:17:34,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:34,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:17:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-12-05 21:17:34,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:34,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340987201] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:34,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:34,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [17] total 19 [2023-12-05 21:17:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95788670] [2023-12-05 21:17:34,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:34,177 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:17:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:17:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-12-05 21:17:34,178 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 332 [2023-12-05 21:17:34,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 346 transitions, 1420 flow. Second operand has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:34,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:34,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 332 [2023-12-05 21:17:34,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:44,435 INFO L124 PetriNetUnfolderBase]: 36965/80864 cut-off events. [2023-12-05 21:17:44,436 INFO L125 PetriNetUnfolderBase]: For 168201/172034 co-relation queries the response was YES. [2023-12-05 21:17:44,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237926 conditions, 80864 events. 36965/80864 cut-off events. For 168201/172034 co-relation queries the response was YES. Maximal size of possible extension queue 2828. Compared 1009265 event pairs, 33250 based on Foata normal form. 0/73630 useless extension candidates. Maximal degree in co-relation 18704. Up to 45198 conditions per place. [2023-12-05 21:17:45,287 INFO L140 encePairwiseOnDemand]: 326/332 looper letters, 157 selfloop transitions, 4 changer transitions 1/404 dead transitions. [2023-12-05 21:17:45,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 404 transitions, 2082 flow [2023-12-05 21:17:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:17:45,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:17:45,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 969 transitions. [2023-12-05 21:17:45,289 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7296686746987951 [2023-12-05 21:17:45,289 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 969 transitions. [2023-12-05 21:17:45,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 969 transitions. [2023-12-05 21:17:45,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:45,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 969 transitions. [2023-12-05 21:17:45,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 242.25) internal successors, (969), 4 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:45,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:45,292 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 332.0) internal successors, (1660), 5 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:45,292 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 24 predicate places. [2023-12-05 21:17:45,292 INFO L500 AbstractCegarLoop]: Abstraction has has 313 places, 404 transitions, 2082 flow [2023-12-05 21:17:45,292 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.25) internal successors, (841), 4 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:45,292 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:45,292 INFO L233 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:45,312 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 21:17:45,496 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 21:17:45,497 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:45,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:45,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1956440705, now seen corresponding path program 1 times [2023-12-05 21:17:45,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:45,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756553124] [2023-12-05 21:17:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:45,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:45,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:45,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:45,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756553124] [2023-12-05 21:17:45,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756553124] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:45,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254339506] [2023-12-05 21:17:45,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:45,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:45,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:45,673 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:45,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-05 21:17:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:45,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:17:45,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:45,810 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:17:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:17:45,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254339506] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:17:45,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:17:45,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-12-05 21:17:45,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390525347] [2023-12-05 21:17:45,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:17:45,924 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-05 21:17:45,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-05 21:17:45,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-12-05 21:17:45,928 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 332 [2023-12-05 21:17:45,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 404 transitions, 2082 flow. Second operand has 23 states, 23 states have (on average 251.47826086956522) internal successors, (5784), 23 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:45,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:45,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 332 [2023-12-05 21:17:45,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:17:57,891 INFO L124 PetriNetUnfolderBase]: 36965/80879 cut-off events. [2023-12-05 21:17:57,891 INFO L125 PetriNetUnfolderBase]: For 249517/253580 co-relation queries the response was YES. [2023-12-05 21:17:58,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258612 conditions, 80879 events. 36965/80879 cut-off events. For 249517/253580 co-relation queries the response was YES. Maximal size of possible extension queue 2822. Compared 1008793 event pairs, 33250 based on Foata normal form. 0/73645 useless extension candidates. Maximal degree in co-relation 20277. Up to 45198 conditions per place. [2023-12-05 21:17:58,936 INFO L140 encePairwiseOnDemand]: 326/332 looper letters, 94 selfloop transitions, 30 changer transitions 1/419 dead transitions. [2023-12-05 21:17:58,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 419 transitions, 2444 flow [2023-12-05 21:17:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-05 21:17:58,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-12-05 21:17:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 7557 transitions. [2023-12-05 21:17:58,944 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7587349397590362 [2023-12-05 21:17:58,944 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 7557 transitions. [2023-12-05 21:17:58,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 7557 transitions. [2023-12-05 21:17:58,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:17:58,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 7557 transitions. [2023-12-05 21:17:58,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 251.9) internal successors, (7557), 30 states have internal predecessors, (7557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:58,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 332.0) internal successors, (10292), 31 states have internal predecessors, (10292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:58,979 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 332.0) internal successors, (10292), 31 states have internal predecessors, (10292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:58,979 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 53 predicate places. [2023-12-05 21:17:58,979 INFO L500 AbstractCegarLoop]: Abstraction has has 342 places, 419 transitions, 2444 flow [2023-12-05 21:17:58,981 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 251.47826086956522) internal successors, (5784), 23 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:58,981 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:17:58,981 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:17:59,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-05 21:17:59,202 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-05 21:17:59,203 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:17:59,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:17:59,203 INFO L85 PathProgramCache]: Analyzing trace with hash 334811118, now seen corresponding path program 2 times [2023-12-05 21:17:59,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:17:59,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540920446] [2023-12-05 21:17:59,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:17:59,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:17:59,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:17:59,308 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:59,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:17:59,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540920446] [2023-12-05 21:17:59,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540920446] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:17:59,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622933162] [2023-12-05 21:17:59,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-05 21:17:59,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:17:59,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:17:59,321 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:17:59,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-05 21:17:59,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-05 21:17:59,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-05 21:17:59,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-05 21:17:59,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:17:59,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-05 21:17:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:17:59,590 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:17:59,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622933162] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:17:59,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:17:59,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2023-12-05 21:17:59,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821877653] [2023-12-05 21:17:59,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:17:59,592 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:17:59,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:17:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:17:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-05 21:17:59,606 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 332 [2023-12-05 21:17:59,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 419 transitions, 2444 flow. Second operand has 7 states, 7 states have (on average 209.14285714285714) internal successors, (1464), 7 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:17:59,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:17:59,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 332 [2023-12-05 21:17:59,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:10,557 INFO L124 PetriNetUnfolderBase]: 36338/81161 cut-off events. [2023-12-05 21:18:10,557 INFO L125 PetriNetUnfolderBase]: For 326204/340289 co-relation queries the response was YES. [2023-12-05 21:18:10,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303068 conditions, 81161 events. 36338/81161 cut-off events. For 326204/340289 co-relation queries the response was YES. Maximal size of possible extension queue 2796. Compared 1022048 event pairs, 6413 based on Foata normal form. 96/75458 useless extension candidates. Maximal degree in co-relation 62344. Up to 43754 conditions per place. [2023-12-05 21:18:11,628 INFO L140 encePairwiseOnDemand]: 323/332 looper letters, 313 selfloop transitions, 10 changer transitions 1/580 dead transitions. [2023-12-05 21:18:11,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 580 transitions, 4542 flow [2023-12-05 21:18:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:18:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:18:11,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2161 transitions. [2023-12-05 21:18:11,631 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7232262382864793 [2023-12-05 21:18:11,631 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2161 transitions. [2023-12-05 21:18:11,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2161 transitions. [2023-12-05 21:18:11,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:11,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2161 transitions. [2023-12-05 21:18:11,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 240.11111111111111) internal successors, (2161), 9 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:11,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:11,636 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:11,637 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, 60 predicate places. [2023-12-05 21:18:11,637 INFO L500 AbstractCegarLoop]: Abstraction has has 349 places, 580 transitions, 4542 flow [2023-12-05 21:18:11,637 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 209.14285714285714) internal successors, (1464), 7 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:11,638 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:11,638 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:11,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-05 21:18:11,842 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-05 21:18:11,843 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:11,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash 34800293, now seen corresponding path program 1 times [2023-12-05 21:18:11,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:11,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438637038] [2023-12-05 21:18:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:11,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:11,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:11,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:11,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438637038] [2023-12-05 21:18:11,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438637038] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:18:11,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632979887] [2023-12-05 21:18:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:11,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:18:11,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:18:11,900 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:18:11,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-05 21:18:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:12,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-05 21:18:12,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:18:12,032 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:12,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-05 21:18:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-12-05 21:18:12,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632979887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-05 21:18:12,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-05 21:18:12,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-05 21:18:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116561090] [2023-12-05 21:18:12,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-05 21:18:12,059 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-05 21:18:12,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:12,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-05 21:18:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:18:12,061 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 332 [2023-12-05 21:18:12,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 580 transitions, 4542 flow. Second operand has 10 states, 10 states have (on average 250.6) internal successors, (2506), 10 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:12,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:12,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 332 [2023-12-05 21:18:12,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:18:13,521 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][389], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 240#t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 565#true, 292#true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 102#L945-2true, 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1978#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 1147#true, 296#true, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1), 23#L953-13true]) [2023-12-05 21:18:13,521 INFO L294 olderBase$Statistics]: this new event has 166 ancestors and is cut-off event [2023-12-05 21:18:13,521 INFO L297 olderBase$Statistics]: existing Event has 157 ancestors and is cut-off event [2023-12-05 21:18:13,521 INFO L297 olderBase$Statistics]: existing Event has 157 ancestors and is cut-off event [2023-12-05 21:18:13,521 INFO L297 olderBase$Statistics]: existing Event has 166 ancestors and is cut-off event [2023-12-05 21:18:13,547 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][396], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 565#true, 240#t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 292#true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 41#L953-4true, 102#L945-2true, 1985#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~3#1| 9999) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1147#true, 296#true, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1)]) [2023-12-05 21:18:13,547 INFO L294 olderBase$Statistics]: this new event has 167 ancestors and is cut-off event [2023-12-05 21:18:13,547 INFO L297 olderBase$Statistics]: existing Event has 158 ancestors and is cut-off event [2023-12-05 21:18:13,547 INFO L297 olderBase$Statistics]: existing Event has 158 ancestors and is cut-off event [2023-12-05 21:18:13,547 INFO L297 olderBase$Statistics]: existing Event has 167 ancestors and is cut-off event [2023-12-05 21:18:13,554 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][389], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 565#true, 292#true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 102#L945-2true, 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1978#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 1147#true, 296#true, 93#t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1), 23#L953-13true]) [2023-12-05 21:18:13,554 INFO L294 olderBase$Statistics]: this new event has 167 ancestors and is cut-off event [2023-12-05 21:18:13,555 INFO L297 olderBase$Statistics]: existing Event has 158 ancestors and is cut-off event [2023-12-05 21:18:13,555 INFO L297 olderBase$Statistics]: existing Event has 158 ancestors and is cut-off event [2023-12-05 21:18:13,555 INFO L297 olderBase$Statistics]: existing Event has 167 ancestors and is cut-off event [2023-12-05 21:18:13,578 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][396], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 565#true, 292#true, 41#L953-4true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 102#L945-2true, 1985#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~3#1| 9999) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1147#true, 93#t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 296#true, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1)]) [2023-12-05 21:18:13,578 INFO L294 olderBase$Statistics]: this new event has 168 ancestors and is cut-off event [2023-12-05 21:18:13,578 INFO L297 olderBase$Statistics]: existing Event has 159 ancestors and is cut-off event [2023-12-05 21:18:13,578 INFO L297 olderBase$Statistics]: existing Event has 159 ancestors and is cut-off event [2023-12-05 21:18:13,579 INFO L297 olderBase$Statistics]: existing Event has 168 ancestors and is cut-off event [2023-12-05 21:18:13,611 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([1025] L944-55-->L945-2: Formula: (and (= |v_t_funThread1of2ForFork0_#t~nondet45#1_1| 0) (= |v_#pthreadsMutex_135| (store |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5| (store (select |v_#pthreadsMutex_136| |v_t_funThread1of2ForFork0_~p~0#1.base_5|) (+ 4 |v_t_funThread1of2ForFork0_~p~0#1.offset_5|) 0)))) InVars {#pthreadsMutex=|v_#pthreadsMutex_136|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} OutVars{#pthreadsMutex=|v_#pthreadsMutex_135|, t_funThread1of2ForFork0_~p~0#1.base=|v_t_funThread1of2ForFork0_~p~0#1.base_5|, t_funThread1of2ForFork0_#t~nondet45#1=|v_t_funThread1of2ForFork0_#t~nondet45#1_1|, t_funThread1of2ForFork0_~p~0#1.offset=|v_t_funThread1of2ForFork0_~p~0#1.offset_5|} AuxVars[] AssignedVars[#pthreadsMutex, t_funThread1of2ForFork0_#t~nondet45#1][389], [t_funThread1of2ForFork0InUse, t_funThread2of2ForFork0InUse, 565#true, 292#true, 1132#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|))), 102#L945-2true, 2348#(< |ULTIMATE.start_main_~i~3#1| 10000), 1978#(and (= |ULTIMATE.start_main_~#t_ids~0#1.offset| 0) (<= 40000 (select |#length| |ULTIMATE.start_main_~#t_ids~0#1.base|)) (<= 1 |ULTIMATE.start_main_~i~3#1|)), 1147#true, 296#true, 127#t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCEtrue, 563#(= (select |#valid| |ULTIMATE.start_main_~#t_ids~0#1.base|) 1), 23#L953-13true]) [2023-12-05 21:18:13,611 INFO L294 olderBase$Statistics]: this new event has 169 ancestors and is cut-off event [2023-12-05 21:18:13,611 INFO L297 olderBase$Statistics]: existing Event has 169 ancestors and is cut-off event [2023-12-05 21:18:13,611 INFO L297 olderBase$Statistics]: existing Event has 160 ancestors and is cut-off event [2023-12-05 21:18:13,611 INFO L297 olderBase$Statistics]: existing Event has 160 ancestors and is cut-off event [2023-12-05 21:18:13,740 INFO L124 PetriNetUnfolderBase]: 5536/13296 cut-off events. [2023-12-05 21:18:13,740 INFO L125 PetriNetUnfolderBase]: For 62266/68468 co-relation queries the response was YES. [2023-12-05 21:18:13,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50352 conditions, 13296 events. 5536/13296 cut-off events. For 62266/68468 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 136602 event pairs, 1455 based on Foata normal form. 639/13433 useless extension candidates. Maximal degree in co-relation 29861. Up to 7334 conditions per place. [2023-12-05 21:18:13,861 INFO L140 encePairwiseOnDemand]: 327/332 looper letters, 121 selfloop transitions, 7 changer transitions 1/428 dead transitions. [2023-12-05 21:18:13,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 428 transitions, 3750 flow [2023-12-05 21:18:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-05 21:18:13,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-12-05 21:18:13,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2338 transitions. [2023-12-05 21:18:13,871 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7824631860776439 [2023-12-05 21:18:13,871 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2338 transitions. [2023-12-05 21:18:13,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2338 transitions. [2023-12-05 21:18:13,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:18:13,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2338 transitions. [2023-12-05 21:18:13,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 259.77777777777777) internal successors, (2338), 9 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 21:18:13,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:13,875 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 332.0) internal successors, (3320), 10 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:13,876 INFO L308 CegarLoopForPetriNet]: 289 programPoint places, -8 predicate places. [2023-12-05 21:18:13,876 INFO L500 AbstractCegarLoop]: Abstraction has has 281 places, 428 transitions, 3750 flow [2023-12-05 21:18:13,876 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 250.6) internal successors, (2506), 10 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:13,876 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:13,876 INFO L233 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:13,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-05 21:18:14,077 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-05 21:18:14,077 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:18:14,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:14,077 INFO L85 PathProgramCache]: Analyzing trace with hash 269404677, now seen corresponding path program 1 times [2023-12-05 21:18:14,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:14,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170719166] [2023-12-05 21:18:14,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:14,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:18:14,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:18:14,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:18:14,111 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:18:14,111 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:18:14,111 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2023-12-05 21:18:14,111 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 45 remaining) [2023-12-05 21:18:14,112 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 45 remaining) [2023-12-05 21:18:14,113 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 45 remaining) [2023-12-05 21:18:14,114 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 45 remaining) [2023-12-05 21:18:14,114 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-05 21:18:14,115 INFO L457 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1] [2023-12-05 21:18:14,115 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:18:14,115 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:18:14,151 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-05 21:18:14,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 368 places, 424 transitions, 875 flow [2023-12-05 21:18:14,235 INFO L124 PetriNetUnfolderBase]: 117/810 cut-off events. [2023-12-05 21:18:14,236 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-12-05 21:18:14,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 810 events. 117/810 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4238 event pairs, 1 based on Foata normal form. 0/595 useless extension candidates. Maximal degree in co-relation 562. Up to 16 conditions per place. [2023-12-05 21:18:14,251 INFO L82 GeneralOperation]: Start removeDead. Operand has 368 places, 424 transitions, 875 flow [2023-12-05 21:18:14,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 368 places, 424 transitions, 875 flow [2023-12-05 21:18:14,259 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:18:14,259 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;@42503c86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:18:14,259 INFO L363 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2023-12-05 21:18:14,261 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:18:14,261 INFO L124 PetriNetUnfolderBase]: 4/49 cut-off events. [2023-12-05 21:18:14,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:18:14,261 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:18:14,261 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:18:14,261 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2023-12-05 21:18:14,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:18:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1876197022, now seen corresponding path program 1 times [2023-12-05 21:18:14,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:18:14,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531411650] [2023-12-05 21:18:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:18:14,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:18:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:18:14,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:18:14,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:18:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531411650] [2023-12-05 21:18:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531411650] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:18:14,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:18:14,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:18:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355916398] [2023-12-05 21:18:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:18:14,277 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:18:14,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:18:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:18:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:18:14,278 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 424 [2023-12-05 21:18:14,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 424 transitions, 875 flow. Second operand has 3 states, 3 states have (on average 319.3333333333333) internal successors, (958), 3 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:18:14,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:18:14,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 424 [2023-12-05 21:18:14,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand