/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -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/weaver/chl-nzb-file-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-30 05:32:04,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-30 05:32:04,157 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 [2023-11-30 05:32:04,181 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-30 05:32:04,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-30 05:32:04,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-30 05:32:04,183 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-30 05:32:04,183 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-30 05:32:04,183 INFO L153 SettingsManager]: * Use SBE=true [2023-11-30 05:32:04,186 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-30 05:32:04,187 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-30 05:32:04,187 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-30 05:32:04,187 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-30 05:32:04,188 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-30 05:32:04,188 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-30 05:32:04,188 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-30 05:32:04,188 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-30 05:32:04,189 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-30 05:32:04,189 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-30 05:32:04,189 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-30 05:32:04,189 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-30 05:32:04,190 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-30 05:32:04,190 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-30 05:32:04,190 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-30 05:32:04,190 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-30 05:32:04,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:32:04,191 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-30 05:32:04,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-30 05:32:04,191 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-30 05:32:04,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-30 05:32:04,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-30 05:32:04,192 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-30 05:32:04,192 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-30 05:32:04,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-11-30 05:32:04,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-30 05:32:04,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-30 05:32:04,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-30 05:32:04,423 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-30 05:32:04,423 INFO L274 PluginConnector]: CDTParser initialized [2023-11-30 05:32:04,424 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-11-30 05:32:05,383 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-30 05:32:05,515 INFO L384 CDTParser]: Found 1 translation units. [2023-11-30 05:32:05,516 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-nzb-file-subst.wvr.c [2023-11-30 05:32:05,521 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e664bc55/af9fc12f2f22437b8f8410994c4ef1f7/FLAG4c7ea52ac [2023-11-30 05:32:05,529 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e664bc55/af9fc12f2f22437b8f8410994c4ef1f7 [2023-11-30 05:32:05,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-30 05:32:05,531 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-30 05:32:05,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-30 05:32:05,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-30 05:32:05,535 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-30 05:32:05,535 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58d23d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05, skipping insertion in model container [2023-11-30 05:32:05,536 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,556 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-30 05:32:05,720 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:32:05,731 INFO L202 MainTranslator]: Completed pre-run [2023-11-30 05:32:05,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-30 05:32:05,786 INFO L206 MainTranslator]: Completed translation [2023-11-30 05:32:05,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05 WrapperNode [2023-11-30 05:32:05,786 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-30 05:32:05,787 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-30 05:32:05,787 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-30 05:32:05,787 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-30 05:32:05,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,801 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,853 INFO L138 Inliner]: procedures = 26, calls = 77, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 608 [2023-11-30 05:32:05,853 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-30 05:32:05,854 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-30 05:32:05,854 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-30 05:32:05,854 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-30 05:32:05,865 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,865 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,869 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,869 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,880 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,884 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,886 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,888 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,891 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-30 05:32:05,892 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-30 05:32:05,892 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-30 05:32:05,892 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-30 05:32:05,893 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (1/1) ... [2023-11-30 05:32:05,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-30 05:32:05,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:32:05,949 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) [2023-11-30 05:32:05,956 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 [2023-11-30 05:32:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-30 05:32:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-30 05:32:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-30 05:32:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-30 05:32:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-30 05:32:05,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-30 05:32:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-30 05:32:05,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-30 05:32:05,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-30 05:32:05,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-30 05:32:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-30 05:32:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-30 05:32:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-30 05:32:05,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-30 05:32:05,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-30 05:32:05,981 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-30 05:32:06,100 INFO L241 CfgBuilder]: Building ICFG [2023-11-30 05:32:06,101 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-30 05:32:06,868 INFO L282 CfgBuilder]: Performing block encoding [2023-11-30 05:32:06,892 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-30 05:32:06,893 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-30 05:32:06,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:32:06 BoogieIcfgContainer [2023-11-30 05:32:06,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-30 05:32:06,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-30 05:32:06,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-30 05:32:06,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-30 05:32:06,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 05:32:05" (1/3) ... [2023-11-30 05:32:06,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1746b4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:32:06, skipping insertion in model container [2023-11-30 05:32:06,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 05:32:05" (2/3) ... [2023-11-30 05:32:06,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1746b4dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 05:32:06, skipping insertion in model container [2023-11-30 05:32:06,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 05:32:06" (3/3) ... [2023-11-30 05:32:06,901 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2023-11-30 05:32:06,912 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-30 05:32:06,913 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 66 error locations. [2023-11-30 05:32:06,913 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-30 05:32:07,069 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-30 05:32:07,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 795 places, 858 transitions, 1737 flow [2023-11-30 05:32:07,321 INFO L124 PetriNetUnfolderBase]: 73/855 cut-off events. [2023-11-30 05:32:07,321 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-30 05:32:07,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 855 events. 73/855 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3219 event pairs, 0 based on Foata normal form. 0/716 useless extension candidates. Maximal degree in co-relation 629. Up to 2 conditions per place. [2023-11-30 05:32:07,346 INFO L82 GeneralOperation]: Start removeDead. Operand has 795 places, 858 transitions, 1737 flow [2023-11-30 05:32:07,360 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 769 places, 831 transitions, 1677 flow [2023-11-30 05:32:07,365 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-30 05:32:07,369 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;@4b65fd7c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-30 05:32:07,369 INFO L363 AbstractCegarLoop]: Starting to check reachability of 117 error locations. [2023-11-30 05:32:07,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-30 05:32:07,380 INFO L124 PetriNetUnfolderBase]: 3/128 cut-off events. [2023-11-30 05:32:07,380 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-30 05:32:07,380 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:32:07,380 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:32:07,380 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-11-30 05:32:07,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:32:07,384 INFO L85 PathProgramCache]: Analyzing trace with hash -323028597, now seen corresponding path program 1 times [2023-11-30 05:32:07,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:32:07,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764668908] [2023-11-30 05:32:07,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:32:07,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:32:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:32:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:32:07,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:32:07,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764668908] [2023-11-30 05:32:07,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764668908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:32:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:32:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-30 05:32:07,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228888734] [2023-11-30 05:32:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:32:07,751 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-30 05:32:07,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:32:07,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-30 05:32:07,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-30 05:32:07,782 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 718 out of 858 [2023-11-30 05:32:07,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 831 transitions, 1677 flow. Second operand has 4 states, 4 states have (on average 720.75) internal successors, (2883), 4 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:32:07,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:32:07,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 718 of 858 [2023-11-30 05:32:07,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:32:25,809 INFO L124 PetriNetUnfolderBase]: 43444/109080 cut-off events. [2023-11-30 05:32:25,810 INFO L125 PetriNetUnfolderBase]: For 316/324 co-relation queries the response was YES. [2023-11-30 05:32:26,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166676 conditions, 109080 events. 43444/109080 cut-off events. For 316/324 co-relation queries the response was YES. Maximal size of possible extension queue 5510. Compared 1561687 event pairs, 40064 based on Foata normal form. 18797/90055 useless extension candidates. Maximal degree in co-relation 160304. Up to 56654 conditions per place. [2023-11-30 05:32:27,571 INFO L140 encePairwiseOnDemand]: 807/858 looper letters, 83 selfloop transitions, 12 changer transitions 6/792 dead transitions. [2023-11-30 05:32:27,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 792 transitions, 1789 flow [2023-11-30 05:32:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-30 05:32:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-30 05:32:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 3724 transitions. [2023-11-30 05:32:27,586 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8680652680652681 [2023-11-30 05:32:27,587 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 3724 transitions. [2023-11-30 05:32:27,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 3724 transitions. [2023-11-30 05:32:27,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:32:27,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 3724 transitions. [2023-11-30 05:32:27,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 744.8) internal successors, (3724), 5 states have internal predecessors, (3724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:32:27,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 858.0) internal successors, (5148), 6 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:32:27,609 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 858.0) internal successors, (5148), 6 states have internal predecessors, (5148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:32:27,612 INFO L307 CegarLoopForPetriNet]: 769 programPoint places, 1 predicate places. [2023-11-30 05:32:27,612 INFO L500 AbstractCegarLoop]: Abstraction has has 770 places, 792 transitions, 1789 flow [2023-11-30 05:32:27,613 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 720.75) internal successors, (2883), 4 states have internal predecessors, (2883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:32:27,613 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:32:27,613 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:32:27,613 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-30 05:32:27,614 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-11-30 05:32:27,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:32:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash -323028596, now seen corresponding path program 1 times [2023-11-30 05:32:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:32:27,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569242031] [2023-11-30 05:32:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:32:27,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:32:27,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:32:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:32:27,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:32:27,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569242031] [2023-11-30 05:32:27,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569242031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-30 05:32:27,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-30 05:32:27,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-30 05:32:27,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407125516] [2023-11-30 05:32:27,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-30 05:32:27,854 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-30 05:32:27,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:32:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-30 05:32:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-30 05:32:27,967 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 692 out of 858 [2023-11-30 05:32:27,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 770 places, 792 transitions, 1789 flow. Second operand has 8 states, 8 states have (on average 693.875) internal successors, (5551), 8 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:32:27,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:32:27,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 692 of 858 [2023-11-30 05:32:27,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-30 05:33:34,909 INFO L124 PetriNetUnfolderBase]: 148276/355898 cut-off events. [2023-11-30 05:33:34,910 INFO L125 PetriNetUnfolderBase]: For 65782/98797 co-relation queries the response was YES. [2023-11-30 05:33:38,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651914 conditions, 355898 events. 148276/355898 cut-off events. For 65782/98797 co-relation queries the response was YES. Maximal size of possible extension queue 19421. Compared 5659900 event pairs, 136536 based on Foata normal form. 0/302775 useless extension candidates. Maximal degree in co-relation 633968. Up to 146990 conditions per place. [2023-11-30 05:33:41,761 INFO L140 encePairwiseOnDemand]: 825/858 looper letters, 109 selfloop transitions, 27 changer transitions 6/804 dead transitions. [2023-11-30 05:33:41,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 804 transitions, 2091 flow [2023-11-30 05:33:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-30 05:33:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-30 05:33:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 5678 transitions. [2023-11-30 05:33:41,769 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8272144522144522 [2023-11-30 05:33:41,770 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 5678 transitions. [2023-11-30 05:33:41,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 5678 transitions. [2023-11-30 05:33:41,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-30 05:33:41,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 5678 transitions. [2023-11-30 05:33:41,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 709.75) internal successors, (5678), 8 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:33:41,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 858.0) internal successors, (7722), 9 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:33:41,800 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 858.0) internal successors, (7722), 9 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:33:41,801 INFO L307 CegarLoopForPetriNet]: 769 programPoint places, 8 predicate places. [2023-11-30 05:33:41,801 INFO L500 AbstractCegarLoop]: Abstraction has has 777 places, 804 transitions, 2091 flow [2023-11-30 05:33:41,804 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 693.875) internal successors, (5551), 8 states have internal predecessors, (5551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:33:41,804 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-30 05:33:41,804 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-30 05:33:41,804 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-30 05:33:41,805 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 114 more)] === [2023-11-30 05:33:41,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-30 05:33:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash 103146463, now seen corresponding path program 1 times [2023-11-30 05:33:41,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-30 05:33:41,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867949168] [2023-11-30 05:33:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:33:41,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-30 05:33:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:33:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:33:42,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-30 05:33:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867949168] [2023-11-30 05:33:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867949168] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-30 05:33:42,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757846028] [2023-11-30 05:33:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-30 05:33:42,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-30 05:33:42,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-30 05:33:42,338 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) [2023-11-30 05:33:42,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-30 05:33:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-30 05:33:42,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-30 05:33:42,524 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-30 05:33:42,625 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 6 treesize of output 5 [2023-11-30 05:33:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:33:42,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-30 05:33:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-30 05:33:43,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757846028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-30 05:33:43,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-30 05:33:43,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 23 [2023-11-30 05:33:43,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159785284] [2023-11-30 05:33:43,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-30 05:33:43,056 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-30 05:33:43,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-30 05:33:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-30 05:33:43,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-30 05:33:43,065 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 689 out of 858 [2023-11-30 05:33:43,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 804 transitions, 2091 flow. Second operand has 24 states, 24 states have (on average 691.0) internal successors, (16584), 24 states have internal predecessors, (16584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-30 05:33:43,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-30 05:33:43,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 689 of 858 [2023-11-30 05:33:43,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand