/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:45:25,085 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:45:25,140 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-VariableLbe.epf [2023-08-26 11:45:25,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:45:25,144 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:45:25,165 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:45:25,166 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:45:25,167 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:45:25,167 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:45:25,171 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:45:25,171 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:45:25,171 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:45:25,171 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:45:25,172 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:45:25,173 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:45:25,173 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:45:25,173 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:45:25,173 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:45:25,174 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:45:25,174 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:45:25,174 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:45:25,175 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:45:25,175 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:45:25,176 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:45:25,176 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:45:25,176 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:45:25,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:45:25,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:45:25,177 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:45:25,177 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:45:25,178 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:45:25,178 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:45:25,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:45:25,179 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:45:25,179 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:45:25,179 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:45:25,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:45:25,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:45:25,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:45:25,510 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:45:25,512 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:45:25,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-26 11:45:26,541 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:45:26,836 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:45:26,837 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-26 11:45:26,861 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c9fed633/e53964084b2e480ebe67ccd35ae434b2/FLAG5edd4043b [2023-08-26 11:45:26,876 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c9fed633/e53964084b2e480ebe67ccd35ae434b2 [2023-08-26 11:45:26,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:45:26,882 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:45:26,885 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:45:26,885 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:45:26,888 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:45:26,889 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:45:26" (1/1) ... [2023-08-26 11:45:26,890 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f9e2861 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:26, skipping insertion in model container [2023-08-26 11:45:26,890 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:45:26" (1/1) ... [2023-08-26 11:45:26,935 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:45:27,240 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:45:27,249 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:45:27,270 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-26 11:45:27,272 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-26 11:45:27,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:45:27,326 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:45:27,328 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27 WrapperNode [2023-08-26 11:45:27,328 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:45:27,329 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:45:27,329 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:45:27,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:45:27,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,360 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,380 INFO L138 Inliner]: procedures = 169, calls = 15, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 50 [2023-08-26 11:45:27,381 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:45:27,381 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:45:27,382 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:45:27,382 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:45:27,388 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,393 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,413 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:45:27,414 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:45:27,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:45:27,414 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:45:27,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (1/1) ... [2023-08-26 11:45:27,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:45:27,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:45:27,445 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) [2023-08-26 11:45:27,463 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 [2023-08-26 11:45:27,474 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:45:27,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:45:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:45:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:45:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:45:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:45:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:45:27,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:45:27,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:45:27,476 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 11:45:27,611 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:45:27,613 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:45:27,739 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:45:27,777 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:45:27,777 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 11:45:27,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:45:27 BoogieIcfgContainer [2023-08-26 11:45:27,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:45:27,781 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:45:27,781 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:45:27,787 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:45:27,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:45:26" (1/3) ... [2023-08-26 11:45:27,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119398ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:45:27, skipping insertion in model container [2023-08-26 11:45:27,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:45:27" (2/3) ... [2023-08-26 11:45:27,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119398ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:45:27, skipping insertion in model container [2023-08-26 11:45:27,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:45:27" (3/3) ... [2023-08-26 11:45:27,790 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-08-26 11:45:27,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:45:27,805 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-26 11:45:27,805 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:45:27,859 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:45:27,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 44 transitions, 93 flow [2023-08-26 11:45:27,939 INFO L124 PetriNetUnfolderBase]: 4/56 cut-off events. [2023-08-26 11:45:27,939 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:27,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 56 events. 4/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 97 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 30. Up to 4 conditions per place. [2023-08-26 11:45:27,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 44 transitions, 93 flow [2023-08-26 11:45:27,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 44 transitions, 93 flow [2023-08-26 11:45:27,952 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:45:27,964 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 44 places, 44 transitions, 93 flow [2023-08-26 11:45:27,969 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 44 places, 44 transitions, 93 flow [2023-08-26 11:45:27,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 44 transitions, 93 flow [2023-08-26 11:45:28,000 INFO L124 PetriNetUnfolderBase]: 4/56 cut-off events. [2023-08-26 11:45:28,000 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:28,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 56 events. 4/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 97 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 30. Up to 4 conditions per place. [2023-08-26 11:45:28,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 480 [2023-08-26 11:45:29,304 INFO L134 LiptonReduction]: Checked pairs total: 445 [2023-08-26 11:45:29,304 INFO L136 LiptonReduction]: Total number of compositions: 49 [2023-08-26 11:45:29,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:45:29,321 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@10618e80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:45:29,321 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 11:45:29,322 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:45:29,323 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:45:29,323 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:29,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:29,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:29,324 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 11:45:29,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash 7632, now seen corresponding path program 1 times [2023-08-26 11:45:29,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415612370] [2023-08-26 11:45:29,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:29,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:29,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:29,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415612370] [2023-08-26 11:45:29,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415612370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:29,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:29,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:29,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160441160] [2023-08-26 11:45:29,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:29,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:29,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:29,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:29,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 93 [2023-08-26 11:45:29,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 10 transitions, 25 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:29,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 93 [2023-08-26 11:45:29,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:29,546 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-26 11:45:29,547 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:29,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 15 events. 3/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 18 event pairs, 3 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 20. Up to 14 conditions per place. [2023-08-26 11:45:29,548 INFO L140 encePairwiseOnDemand]: 89/93 looper letters, 5 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2023-08-26 11:45:29,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 12 places, 7 transitions, 31 flow [2023-08-26 11:45:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:29,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:29,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-08-26 11:45:29,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2023-08-26 11:45:29,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-08-26 11:45:29,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-08-26 11:45:29,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:29,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-08-26 11:45:29,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,572 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,574 INFO L175 Difference]: Start difference. First operand has 13 places, 10 transitions, 25 flow. Second operand 3 states and 87 transitions. [2023-08-26 11:45:29,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 12 places, 7 transitions, 31 flow [2023-08-26 11:45:29,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 7 transitions, 31 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:45:29,578 INFO L231 Difference]: Finished difference. Result has 12 places, 7 transitions, 21 flow [2023-08-26 11:45:29,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=21, PETRI_PLACES=12, PETRI_TRANSITIONS=7} [2023-08-26 11:45:29,582 INFO L281 CegarLoopForPetriNet]: 13 programPoint places, -1 predicate places. [2023-08-26 11:45:29,582 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 7 transitions, 21 flow [2023-08-26 11:45:29,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:29,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:45:29,584 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 11:45:29,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 7633, now seen corresponding path program 1 times [2023-08-26 11:45:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:29,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245527679] [2023-08-26 11:45:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:29,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:29,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:29,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245527679] [2023-08-26 11:45:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245527679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:29,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:29,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:29,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070827808] [2023-08-26 11:45:29,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:29,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:29,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:29,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 93 [2023-08-26 11:45:29,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 7 transitions, 21 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:29,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 93 [2023-08-26 11:45:29,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:29,681 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-26 11:45:29,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:29,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 22. Up to 10 conditions per place. [2023-08-26 11:45:29,681 INFO L140 encePairwiseOnDemand]: 91/93 looper letters, 4 selfloop transitions, 1 changer transitions 0/6 dead transitions. [2023-08-26 11:45:29,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 6 transitions, 29 flow [2023-08-26 11:45:29,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:29,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2023-08-26 11:45:29,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118279569892473 [2023-08-26 11:45:29,684 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 87 transitions. [2023-08-26 11:45:29,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 87 transitions. [2023-08-26 11:45:29,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:29,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 87 transitions. [2023-08-26 11:45:29,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,687 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 93.0) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,687 INFO L175 Difference]: Start difference. First operand has 12 places, 7 transitions, 21 flow. Second operand 3 states and 87 transitions. [2023-08-26 11:45:29,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 6 transitions, 29 flow [2023-08-26 11:45:29,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 6 transitions, 28 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:45:29,687 INFO L231 Difference]: Finished difference. Result has 12 places, 6 transitions, 20 flow [2023-08-26 11:45:29,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=93, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=12, PETRI_TRANSITIONS=6} [2023-08-26 11:45:29,688 INFO L281 CegarLoopForPetriNet]: 13 programPoint places, -1 predicate places. [2023-08-26 11:45:29,688 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 6 transitions, 20 flow [2023-08-26 11:45:29,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:29,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:29,689 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 11:45:29,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:45:29,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 11:45:29,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1537576195, now seen corresponding path program 1 times [2023-08-26 11:45:29,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:29,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140532246] [2023-08-26 11:45:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:29,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:45:29,705 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:45:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:45:29,728 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:45:29,729 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:45:29,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-26 11:45:29,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2023-08-26 11:45:29,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-08-26 11:45:29,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-08-26 11:45:29,732 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2023-08-26 11:45:29,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:45:29,732 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 11:45:29,740 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:45:29,740 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 11:45:29,752 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:45:29,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 134 flow [2023-08-26 11:45:29,766 INFO L124 PetriNetUnfolderBase]: 7/87 cut-off events. [2023-08-26 11:45:29,767 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:45:29,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 87 events. 7/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 57. Up to 6 conditions per place. [2023-08-26 11:45:29,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 61 transitions, 134 flow [2023-08-26 11:45:29,768 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 61 transitions, 134 flow [2023-08-26 11:45:29,768 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:45:29,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 61 places, 61 transitions, 134 flow [2023-08-26 11:45:29,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 61 places, 61 transitions, 134 flow [2023-08-26 11:45:29,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 61 transitions, 134 flow [2023-08-26 11:45:29,807 INFO L124 PetriNetUnfolderBase]: 7/87 cut-off events. [2023-08-26 11:45:29,807 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:45:29,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 87 events. 7/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 57. Up to 6 conditions per place. [2023-08-26 11:45:29,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 1504 [2023-08-26 11:45:30,793 INFO L134 LiptonReduction]: Checked pairs total: 4252 [2023-08-26 11:45:30,794 INFO L136 LiptonReduction]: Total number of compositions: 55 [2023-08-26 11:45:30,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:45:30,797 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@10618e80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:45:30,797 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 11:45:30,798 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:45:30,798 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:45:30,798 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:30,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:30,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:30,798 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:45:30,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:30,799 INFO L85 PathProgramCache]: Analyzing trace with hash 11918, now seen corresponding path program 1 times [2023-08-26 11:45:30,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:30,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293183244] [2023-08-26 11:45:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:30,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:30,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:30,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293183244] [2023-08-26 11:45:30,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293183244] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:30,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:30,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:30,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49358400] [2023-08-26 11:45:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:30,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:30,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:30,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 116 [2023-08-26 11:45:30,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 30 transitions, 72 flow. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:30,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 116 [2023-08-26 11:45:30,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:30,878 INFO L124 PetriNetUnfolderBase]: 83/217 cut-off events. [2023-08-26 11:45:30,878 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 11:45:30,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 217 events. 83/217 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1187 event pairs, 83 based on Foata normal form. 42/214 useless extension candidates. Maximal degree in co-relation 118. Up to 158 conditions per place. [2023-08-26 11:45:30,880 INFO L140 encePairwiseOnDemand]: 109/116 looper letters, 11 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-26 11:45:30,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 21 transitions, 78 flow [2023-08-26 11:45:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-08-26 11:45:30,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3706896551724138 [2023-08-26 11:45:30,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-08-26 11:45:30,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-08-26 11:45:30,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:30,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-08-26 11:45:30,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,885 INFO L175 Difference]: Start difference. First operand has 31 places, 30 transitions, 72 flow. Second operand 3 states and 129 transitions. [2023-08-26 11:45:30,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 21 transitions, 78 flow [2023-08-26 11:45:30,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 21 transitions, 76 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:45:30,886 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 54 flow [2023-08-26 11:45:30,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-26 11:45:30,887 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-08-26 11:45:30,887 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 54 flow [2023-08-26 11:45:30,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:30,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:30,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:45:30,888 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:45:30,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash 11919, now seen corresponding path program 1 times [2023-08-26 11:45:30,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:30,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337861312] [2023-08-26 11:45:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:30,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:30,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337861312] [2023-08-26 11:45:30,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337861312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:30,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:30,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:30,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770557926] [2023-08-26 11:45:30,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:30,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:30,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:30,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:30,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:30,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 116 [2023-08-26 11:45:30,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:30,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 116 [2023-08-26 11:45:30,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:30,964 INFO L124 PetriNetUnfolderBase]: 49/143 cut-off events. [2023-08-26 11:45:30,964 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 11:45:30,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 143 events. 49/143 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 696 event pairs, 49 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 258. Up to 99 conditions per place. [2023-08-26 11:45:30,965 INFO L140 encePairwiseOnDemand]: 114/116 looper letters, 10 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 11:45:30,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 20 transitions, 74 flow [2023-08-26 11:45:30,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:30,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2023-08-26 11:45:30,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3620689655172414 [2023-08-26 11:45:30,967 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 126 transitions. [2023-08-26 11:45:30,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 126 transitions. [2023-08-26 11:45:30,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:30,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 126 transitions. [2023-08-26 11:45:30,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,970 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 54 flow. Second operand 3 states and 126 transitions. [2023-08-26 11:45:30,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 20 transitions, 74 flow [2023-08-26 11:45:30,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 20 transitions, 73 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:45:30,971 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 53 flow [2023-08-26 11:45:30,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-26 11:45:30,971 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-08-26 11:45:30,972 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 53 flow [2023-08-26 11:45:30,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:30,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:30,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:45:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:45:30,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:45:30,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2063675536, now seen corresponding path program 1 times [2023-08-26 11:45:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775264263] [2023-08-26 11:45:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:31,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:31,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:31,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775264263] [2023-08-26 11:45:31,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775264263] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:31,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:31,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:45:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352564897] [2023-08-26 11:45:31,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:31,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:31,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:31,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:31,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:31,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 116 [2023-08-26 11:45:31,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:31,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:31,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 116 [2023-08-26 11:45:31,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:31,075 INFO L124 PetriNetUnfolderBase]: 121/254 cut-off events. [2023-08-26 11:45:31,076 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:45:31,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 254 events. 121/254 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1233 event pairs, 79 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 518. Up to 183 conditions per place. [2023-08-26 11:45:31,078 INFO L140 encePairwiseOnDemand]: 108/116 looper letters, 24 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-26 11:45:31,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 140 flow [2023-08-26 11:45:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 146 transitions. [2023-08-26 11:45:31,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41954022988505746 [2023-08-26 11:45:31,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 146 transitions. [2023-08-26 11:45:31,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 146 transitions. [2023-08-26 11:45:31,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:31,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 146 transitions. [2023-08-26 11:45:31,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:31,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:31,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:31,082 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 53 flow. Second operand 3 states and 146 transitions. [2023-08-26 11:45:31,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 140 flow [2023-08-26 11:45:31,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 32 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:45:31,083 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 94 flow [2023-08-26 11:45:31,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-26 11:45:31,084 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-26 11:45:31,084 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 94 flow [2023-08-26 11:45:31,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:31,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:31,085 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 11:45:31,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:45:31,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-08-26 11:45:31,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:31,086 INFO L85 PathProgramCache]: Analyzing trace with hash 888945137, now seen corresponding path program 1 times [2023-08-26 11:45:31,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:31,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947449092] [2023-08-26 11:45:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:31,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:45:31,097 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:45:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:45:31,107 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:45:31,107 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:45:31,107 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-26 11:45:31,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2023-08-26 11:45:31,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-08-26 11:45:31,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-08-26 11:45:31,108 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-26 11:45:31,109 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-26 11:45:31,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:45:31,109 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-26 11:45:31,110 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:45:31,110 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 11:45:31,125 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:45:31,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 78 transitions, 177 flow [2023-08-26 11:45:31,138 INFO L124 PetriNetUnfolderBase]: 10/118 cut-off events. [2023-08-26 11:45:31,138 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:45:31,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 118 events. 10/118 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 273 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 91. Up to 8 conditions per place. [2023-08-26 11:45:31,139 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 78 transitions, 177 flow [2023-08-26 11:45:31,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 78 transitions, 177 flow [2023-08-26 11:45:31,164 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:45:31,165 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 78 transitions, 177 flow [2023-08-26 11:45:31,165 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 78 places, 78 transitions, 177 flow [2023-08-26 11:45:31,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 78 transitions, 177 flow [2023-08-26 11:45:31,176 INFO L124 PetriNetUnfolderBase]: 10/118 cut-off events. [2023-08-26 11:45:31,176 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:45:31,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 118 events. 10/118 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 273 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 91. Up to 8 conditions per place. [2023-08-26 11:45:31,179 INFO L119 LiptonReduction]: Number of co-enabled transitions 3072 [2023-08-26 11:45:32,273 INFO L134 LiptonReduction]: Checked pairs total: 9635 [2023-08-26 11:45:32,273 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-08-26 11:45:32,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:45:32,276 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@10618e80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:45:32,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 11:45:32,277 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:45:32,277 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:45:32,277 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:32,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:32,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:32,278 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:45:32,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash 17137, now seen corresponding path program 1 times [2023-08-26 11:45:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:32,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730414595] [2023-08-26 11:45:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:32,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:32,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730414595] [2023-08-26 11:45:32,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730414595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:32,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:32,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:32,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69505633] [2023-08-26 11:45:32,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:32,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:32,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:32,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:32,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:32,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 147 [2023-08-26 11:45:32,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:32,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 147 [2023-08-26 11:45:32,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:32,496 INFO L124 PetriNetUnfolderBase]: 738/1497 cut-off events. [2023-08-26 11:45:32,497 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-08-26 11:45:32,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2825 conditions, 1497 events. 738/1497 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 11258 event pairs, 738 based on Foata normal form. 381/1545 useless extension candidates. Maximal degree in co-relation 485. Up to 1131 conditions per place. [2023-08-26 11:45:32,508 INFO L140 encePairwiseOnDemand]: 139/147 looper letters, 16 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 11:45:32,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 113 flow [2023-08-26 11:45:32,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:32,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2023-08-26 11:45:32,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2023-08-26 11:45:32,510 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 168 transitions. [2023-08-26 11:45:32,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 168 transitions. [2023-08-26 11:45:32,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:32,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 168 transitions. [2023-08-26 11:45:32,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,513 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 99 flow. Second operand 3 states and 168 transitions. [2023-08-26 11:45:32,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 113 flow [2023-08-26 11:45:32,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 29 transitions, 107 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 11:45:32,515 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 75 flow [2023-08-26 11:45:32,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-08-26 11:45:32,516 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-08-26 11:45:32,516 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 75 flow [2023-08-26 11:45:32,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:32,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:32,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:45:32,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:45:32,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:32,517 INFO L85 PathProgramCache]: Analyzing trace with hash 17136, now seen corresponding path program 1 times [2023-08-26 11:45:32,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:32,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753202074] [2023-08-26 11:45:32,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:32,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:32,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:32,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753202074] [2023-08-26 11:45:32,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753202074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:32,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:32,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:32,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087104067] [2023-08-26 11:45:32,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:32,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:32,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:32,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:32,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 147 [2023-08-26 11:45:32,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:32,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 147 [2023-08-26 11:45:32,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:32,663 INFO L124 PetriNetUnfolderBase]: 459/994 cut-off events. [2023-08-26 11:45:32,663 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2023-08-26 11:45:32,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1839 conditions, 994 events. 459/994 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7088 event pairs, 459 based on Foata normal form. 0/843 useless extension candidates. Maximal degree in co-relation 1830. Up to 721 conditions per place. [2023-08-26 11:45:32,669 INFO L140 encePairwiseOnDemand]: 145/147 looper letters, 15 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 11:45:32,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 28 transitions, 105 flow [2023-08-26 11:45:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:32,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:32,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2023-08-26 11:45:32,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37188208616780044 [2023-08-26 11:45:32,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 164 transitions. [2023-08-26 11:45:32,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 164 transitions. [2023-08-26 11:45:32,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:32,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 164 transitions. [2023-08-26 11:45:32,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,674 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,674 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 75 flow. Second operand 3 states and 164 transitions. [2023-08-26 11:45:32,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 28 transitions, 105 flow [2023-08-26 11:45:32,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 28 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:45:32,676 INFO L231 Difference]: Finished difference. Result has 38 places, 28 transitions, 74 flow [2023-08-26 11:45:32,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=38, PETRI_TRANSITIONS=28} [2023-08-26 11:45:32,678 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2023-08-26 11:45:32,678 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 28 transitions, 74 flow [2023-08-26 11:45:32,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:32,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:45:32,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:45:32,679 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:45:32,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:32,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1437207085, now seen corresponding path program 1 times [2023-08-26 11:45:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400855761] [2023-08-26 11:45:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:32,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:32,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:32,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400855761] [2023-08-26 11:45:32,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400855761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:32,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:32,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:45:32,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466647829] [2023-08-26 11:45:32,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:32,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:32,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:32,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:32,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:32,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 147 [2023-08-26 11:45:32,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:32,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:32,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 147 [2023-08-26 11:45:32,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:33,009 INFO L124 PetriNetUnfolderBase]: 1929/3168 cut-off events. [2023-08-26 11:45:33,010 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-26 11:45:33,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6476 conditions, 3168 events. 1929/3168 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20388 event pairs, 1175 based on Foata normal form. 0/2977 useless extension candidates. Maximal degree in co-relation 6466. Up to 2115 conditions per place. [2023-08-26 11:45:33,027 INFO L140 encePairwiseOnDemand]: 135/147 looper letters, 36 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-08-26 11:45:33,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 46 transitions, 206 flow [2023-08-26 11:45:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:33,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:33,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2023-08-26 11:45:33,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2023-08-26 11:45:33,031 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 183 transitions. [2023-08-26 11:45:33,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 183 transitions. [2023-08-26 11:45:33,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:33,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 183 transitions. [2023-08-26 11:45:33,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,038 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,038 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 74 flow. Second operand 3 states and 183 transitions. [2023-08-26 11:45:33,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 46 transitions, 206 flow [2023-08-26 11:45:33,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 46 transitions, 205 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:45:33,039 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 135 flow [2023-08-26 11:45:33,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-26 11:45:33,042 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2023-08-26 11:45:33,042 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 135 flow [2023-08-26 11:45:33,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:33,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:45:33,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:45:33,043 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:45:33,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1460596352, now seen corresponding path program 1 times [2023-08-26 11:45:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:33,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634407092] [2023-08-26 11:45:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:45:33,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:33,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634407092] [2023-08-26 11:45:33,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634407092] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:33,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:33,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:45:33,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458306863] [2023-08-26 11:45:33,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:33,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:33,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:33,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:33,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-08-26 11:45:33,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:33,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-08-26 11:45:33,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:33,158 INFO L124 PetriNetUnfolderBase]: 49/233 cut-off events. [2023-08-26 11:45:33,158 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-26 11:45:33,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1146 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 519. Up to 58 conditions per place. [2023-08-26 11:45:33,160 INFO L140 encePairwiseOnDemand]: 141/147 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-08-26 11:45:33,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 135 flow [2023-08-26 11:45:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:33,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-08-26 11:45:33,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42630385487528344 [2023-08-26 11:45:33,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-08-26 11:45:33,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-08-26 11:45:33,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:33,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-08-26 11:45:33,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 147.0) internal successors, (588), 4 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,163 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 135 flow. Second operand 3 states and 188 transitions. [2023-08-26 11:45:33,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 135 flow [2023-08-26 11:45:33,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 11:45:33,167 INFO L231 Difference]: Finished difference. Result has 34 places, 23 transitions, 75 flow [2023-08-26 11:45:33,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=34, PETRI_TRANSITIONS=23} [2023-08-26 11:45:33,168 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-26 11:45:33,168 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 23 transitions, 75 flow [2023-08-26 11:45:33,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:33,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:33,168 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 11:45:33,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:45:33,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:45:33,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:33,171 INFO L85 PathProgramCache]: Analyzing trace with hash -740601305, now seen corresponding path program 1 times [2023-08-26 11:45:33,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:33,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647257521] [2023-08-26 11:45:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:45:33,195 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:45:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:45:33,204 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:45:33,204 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:45:33,218 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-26 11:45:33,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2023-08-26 11:45:33,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 11:45:33,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 11:45:33,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 11:45:33,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 11:45:33,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 11:45:33,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:45:33,220 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 11:45:33,220 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:45:33,220 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 11:45:33,242 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:45:33,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 222 flow [2023-08-26 11:45:33,262 INFO L124 PetriNetUnfolderBase]: 13/149 cut-off events. [2023-08-26 11:45:33,263 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:45:33,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 149 events. 13/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 351 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 126. Up to 10 conditions per place. [2023-08-26 11:45:33,263 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 95 transitions, 222 flow [2023-08-26 11:45:33,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 95 places, 95 transitions, 222 flow [2023-08-26 11:45:33,265 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:45:33,265 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 95 places, 95 transitions, 222 flow [2023-08-26 11:45:33,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 95 places, 95 transitions, 222 flow [2023-08-26 11:45:33,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 95 transitions, 222 flow [2023-08-26 11:45:33,276 INFO L124 PetriNetUnfolderBase]: 13/149 cut-off events. [2023-08-26 11:45:33,276 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:45:33,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 149 events. 13/149 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 351 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 126. Up to 10 conditions per place. [2023-08-26 11:45:33,280 INFO L119 LiptonReduction]: Number of co-enabled transitions 5184 [2023-08-26 11:45:34,466 INFO L134 LiptonReduction]: Checked pairs total: 16510 [2023-08-26 11:45:34,467 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-26 11:45:34,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:45:34,469 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@10618e80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:45:34,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-26 11:45:34,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:45:34,470 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 11:45:34,470 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:34,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:34,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:34,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:45:34,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:34,470 INFO L85 PathProgramCache]: Analyzing trace with hash 23296, now seen corresponding path program 1 times [2023-08-26 11:45:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:34,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562131616] [2023-08-26 11:45:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:34,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:34,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:34,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562131616] [2023-08-26 11:45:34,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562131616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:34,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:34,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242991613] [2023-08-26 11:45:34,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:34,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:34,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:34,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 176 [2023-08-26 11:45:34,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:34,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:34,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 176 [2023-08-26 11:45:34,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:35,113 INFO L124 PetriNetUnfolderBase]: 5063/8497 cut-off events. [2023-08-26 11:45:35,114 INFO L125 PetriNetUnfolderBase]: For 1648/1648 co-relation queries the response was YES. [2023-08-26 11:45:35,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16476 conditions, 8497 events. 5063/8497 cut-off events. For 1648/1648 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 69528 event pairs, 5063 based on Foata normal form. 2556/9145 useless extension candidates. Maximal degree in co-relation 2720. Up to 6956 conditions per place. [2023-08-26 11:45:35,187 INFO L140 encePairwiseOnDemand]: 166/176 looper letters, 21 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 11:45:35,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 37 transitions, 150 flow [2023-08-26 11:45:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2023-08-26 11:45:35,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2023-08-26 11:45:35,189 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 208 transitions. [2023-08-26 11:45:35,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 208 transitions. [2023-08-26 11:45:35,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:35,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 208 transitions. [2023-08-26 11:45:35,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,191 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,191 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 132 flow. Second operand 3 states and 208 transitions. [2023-08-26 11:45:35,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 37 transitions, 150 flow [2023-08-26 11:45:35,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 37 transitions, 138 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-26 11:45:35,194 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 96 flow [2023-08-26 11:45:35,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-08-26 11:45:35,195 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-26 11:45:35,195 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 96 flow [2023-08-26 11:45:35,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 3 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:35,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:35,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:45:35,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:45:35,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:35,196 INFO L85 PathProgramCache]: Analyzing trace with hash 23295, now seen corresponding path program 1 times [2023-08-26 11:45:35,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:35,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136012754] [2023-08-26 11:45:35,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:35,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:35,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:35,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136012754] [2023-08-26 11:45:35,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136012754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:35,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:35,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:35,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91933652] [2023-08-26 11:45:35,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:35,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:35,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 176 [2023-08-26 11:45:35,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:35,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 176 [2023-08-26 11:45:35,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:35,598 INFO L124 PetriNetUnfolderBase]: 3209/5619 cut-off events. [2023-08-26 11:45:35,598 INFO L125 PetriNetUnfolderBase]: For 328/328 co-relation queries the response was YES. [2023-08-26 11:45:35,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10590 conditions, 5619 events. 3209/5619 cut-off events. For 328/328 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 44864 event pairs, 3209 based on Foata normal form. 0/4693 useless extension candidates. Maximal degree in co-relation 10580. Up to 4471 conditions per place. [2023-08-26 11:45:35,633 INFO L140 encePairwiseOnDemand]: 174/176 looper letters, 20 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 11:45:35,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 36 transitions, 136 flow [2023-08-26 11:45:35,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:35,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:35,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-26 11:45:35,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38257575757575757 [2023-08-26 11:45:35,634 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-26 11:45:35,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-26 11:45:35,634 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:35,634 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-26 11:45:35,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,636 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 96 flow. Second operand 3 states and 202 transitions. [2023-08-26 11:45:35,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 36 transitions, 136 flow [2023-08-26 11:45:35,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 36 transitions, 135 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:45:35,637 INFO L231 Difference]: Finished difference. Result has 48 places, 36 transitions, 95 flow [2023-08-26 11:45:35,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=48, PETRI_TRANSITIONS=36} [2023-08-26 11:45:35,638 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2023-08-26 11:45:35,638 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 36 transitions, 95 flow [2023-08-26 11:45:35,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:35,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:45:35,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:45:35,638 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:45:35,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:35,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1842293682, now seen corresponding path program 1 times [2023-08-26 11:45:35,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:35,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880913827] [2023-08-26 11:45:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:35,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:35,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880913827] [2023-08-26 11:45:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880913827] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:35,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:35,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:45:35,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836779930] [2023-08-26 11:45:35,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:35,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:35,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:35,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:35,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 176 [2023-08-26 11:45:35,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 36 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:35,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:35,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 176 [2023-08-26 11:45:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:38,269 INFO L124 PetriNetUnfolderBase]: 24897/36045 cut-off events. [2023-08-26 11:45:38,269 INFO L125 PetriNetUnfolderBase]: For 1660/1660 co-relation queries the response was YES. [2023-08-26 11:45:38,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73305 conditions, 36045 events. 24897/36045 cut-off events. For 1660/1660 co-relation queries the response was YES. Maximal size of possible extension queue 2205. Compared 261291 event pairs, 14733 based on Foata normal form. 0/33364 useless extension candidates. Maximal degree in co-relation 73294. Up to 22495 conditions per place. [2023-08-26 11:45:38,513 INFO L140 encePairwiseOnDemand]: 160/176 looper letters, 48 selfloop transitions, 9 changer transitions 0/60 dead transitions. [2023-08-26 11:45:38,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 60 transitions, 272 flow [2023-08-26 11:45:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2023-08-26 11:45:38,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 11:45:38,517 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2023-08-26 11:45:38,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2023-08-26 11:45:38,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:38,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2023-08-26 11:45:38,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,519 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,520 INFO L175 Difference]: Start difference. First operand has 48 places, 36 transitions, 95 flow. Second operand 3 states and 220 transitions. [2023-08-26 11:45:38,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 60 transitions, 272 flow [2023-08-26 11:45:38,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:45:38,522 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 176 flow [2023-08-26 11:45:38,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-08-26 11:45:38,523 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-26 11:45:38,524 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 176 flow [2023-08-26 11:45:38,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 3 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:38,524 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:45:38,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:45:38,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:45:38,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1398434092, now seen corresponding path program 1 times [2023-08-26 11:45:38,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:38,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576116553] [2023-08-26 11:45:38,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:38,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:38,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:45:38,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:38,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576116553] [2023-08-26 11:45:38,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576116553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:38,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:38,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:45:38,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828581597] [2023-08-26 11:45:38,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:38,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:38,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:38,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:38,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:38,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 176 [2023-08-26 11:45:38,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:38,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 176 [2023-08-26 11:45:38,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:38,641 INFO L124 PetriNetUnfolderBase]: 149/641 cut-off events. [2023-08-26 11:45:38,641 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-08-26 11:45:38,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1457 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4246 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 1443. Up to 164 conditions per place. [2023-08-26 11:45:38,644 INFO L140 encePairwiseOnDemand]: 168/176 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-08-26 11:45:38,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 33 transitions, 175 flow [2023-08-26 11:45:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 226 transitions. [2023-08-26 11:45:38,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2023-08-26 11:45:38,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 226 transitions. [2023-08-26 11:45:38,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 226 transitions. [2023-08-26 11:45:38,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:38,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 226 transitions. [2023-08-26 11:45:38,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,648 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 176 flow. Second operand 3 states and 226 transitions. [2023-08-26 11:45:38,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 33 transitions, 175 flow [2023-08-26 11:45:38,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 11:45:38,650 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 96 flow [2023-08-26 11:45:38,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2023-08-26 11:45:38,652 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2023-08-26 11:45:38,652 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 96 flow [2023-08-26 11:45:38,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:38,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:38,653 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 11:45:38,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:45:38,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 11:45:38,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:38,653 INFO L85 PathProgramCache]: Analyzing trace with hash 367689504, now seen corresponding path program 1 times [2023-08-26 11:45:38,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:38,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116472235] [2023-08-26 11:45:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:38,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:45:38,666 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:45:38,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:45:38,691 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:45:38,691 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:45:38,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-26 11:45:38,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (6 of 8 remaining) [2023-08-26 11:45:38,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-26 11:45:38,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-26 11:45:38,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 8 remaining) [2023-08-26 11:45:38,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 8 remaining) [2023-08-26 11:45:38,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 8 remaining) [2023-08-26 11:45:38,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 8 remaining) [2023-08-26 11:45:38,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:45:38,692 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 11:45:38,693 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:45:38,693 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 11:45:38,719 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:45:38,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 269 flow [2023-08-26 11:45:38,738 INFO L124 PetriNetUnfolderBase]: 16/180 cut-off events. [2023-08-26 11:45:38,739 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 11:45:38,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 180 events. 16/180 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 440 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 162. Up to 12 conditions per place. [2023-08-26 11:45:38,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 112 transitions, 269 flow [2023-08-26 11:45:38,741 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 112 transitions, 269 flow [2023-08-26 11:45:38,741 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:45:38,741 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 112 transitions, 269 flow [2023-08-26 11:45:38,742 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 112 transitions, 269 flow [2023-08-26 11:45:38,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 112 transitions, 269 flow [2023-08-26 11:45:38,819 INFO L124 PetriNetUnfolderBase]: 16/180 cut-off events. [2023-08-26 11:45:38,820 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 11:45:38,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 180 events. 16/180 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 440 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 162. Up to 12 conditions per place. [2023-08-26 11:45:38,826 INFO L119 LiptonReduction]: Number of co-enabled transitions 7840 [2023-08-26 11:45:40,084 INFO L134 LiptonReduction]: Checked pairs total: 26740 [2023-08-26 11:45:40,085 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-26 11:45:40,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:45:40,086 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@10618e80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:45:40,086 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 11:45:40,087 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:45:40,087 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:45:40,087 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:45:40,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:40,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:40,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:45:40,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:40,088 INFO L85 PathProgramCache]: Analyzing trace with hash 30521, now seen corresponding path program 1 times [2023-08-26 11:45:40,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:40,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532778583] [2023-08-26 11:45:40,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:40,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:40,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:40,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532778583] [2023-08-26 11:45:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532778583] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:40,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:40,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:40,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974019409] [2023-08-26 11:45:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:40,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:40,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:40,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:40,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:40,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 209 [2023-08-26 11:45:40,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:40,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:40,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 209 [2023-08-26 11:45:40,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:43,328 INFO L124 PetriNetUnfolderBase]: 32658/49408 cut-off events. [2023-08-26 11:45:43,328 INFO L125 PetriNetUnfolderBase]: For 13038/13038 co-relation queries the response was YES. [2023-08-26 11:45:43,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97542 conditions, 49408 events. 32658/49408 cut-off events. For 13038/13038 co-relation queries the response was YES. Maximal size of possible extension queue 3155. Compared 429152 event pairs, 32658 based on Foata normal form. 16407/54658 useless extension candidates. Maximal degree in co-relation 20866. Up to 42033 conditions per place. [2023-08-26 11:45:43,637 INFO L140 encePairwiseOnDemand]: 197/209 looper letters, 26 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-08-26 11:45:43,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 45 transitions, 189 flow [2023-08-26 11:45:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-26 11:45:43,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003189792663477 [2023-08-26 11:45:43,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-26 11:45:43,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-26 11:45:43,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:43,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-26 11:45:43,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:43,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:43,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:43,644 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 167 flow. Second operand 3 states and 251 transitions. [2023-08-26 11:45:43,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 45 transitions, 189 flow [2023-08-26 11:45:43,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 45 transitions, 169 flow, removed 10 selfloop flow, removed 0 redundant places. [2023-08-26 11:45:43,658 INFO L231 Difference]: Finished difference. Result has 58 places, 45 transitions, 117 flow [2023-08-26 11:45:43,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=58, PETRI_TRANSITIONS=45} [2023-08-26 11:45:43,659 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-08-26 11:45:43,659 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 45 transitions, 117 flow [2023-08-26 11:45:43,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:43,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:43,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:45:43,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 11:45:43,660 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:45:43,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash 30520, now seen corresponding path program 1 times [2023-08-26 11:45:43,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:43,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874679276] [2023-08-26 11:45:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:43,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:43,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:43,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874679276] [2023-08-26 11:45:43,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874679276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:43,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:43,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:45:43,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54885899] [2023-08-26 11:45:43,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:43,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:43,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:43,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 209 [2023-08-26 11:45:43,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 117 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:43,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:43,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 209 [2023-08-26 11:45:43,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:45:45,781 INFO L124 PetriNetUnfolderBase]: 20939/32689 cut-off events. [2023-08-26 11:45:45,781 INFO L125 PetriNetUnfolderBase]: For 1622/1622 co-relation queries the response was YES. [2023-08-26 11:45:45,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62261 conditions, 32689 events. 20939/32689 cut-off events. For 1622/1622 co-relation queries the response was YES. Maximal size of possible extension queue 2107. Compared 281297 event pairs, 20939 based on Foata normal form. 0/27001 useless extension candidates. Maximal degree in co-relation 62250. Up to 27189 conditions per place. [2023-08-26 11:45:45,937 INFO L140 encePairwiseOnDemand]: 207/209 looper letters, 25 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-26 11:45:45,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 44 transitions, 167 flow [2023-08-26 11:45:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:45:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:45:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-26 11:45:45,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37799043062200954 [2023-08-26 11:45:45,938 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-26 11:45:45,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-26 11:45:45,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:45:45,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-26 11:45:45,939 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:45,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:45,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:45,941 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 117 flow. Second operand 3 states and 237 transitions. [2023-08-26 11:45:45,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 44 transitions, 167 flow [2023-08-26 11:45:45,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:45:45,942 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 116 flow [2023-08-26 11:45:45,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-08-26 11:45:45,943 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -5 predicate places. [2023-08-26 11:45:45,943 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 116 flow [2023-08-26 11:45:45,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:45,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:45:45,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:45:45,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 11:45:45,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:45:45,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:45:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1566576302, now seen corresponding path program 1 times [2023-08-26 11:45:45,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:45:45,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127912748] [2023-08-26 11:45:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:45:45,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:45:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:45:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:45:45,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:45:45,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127912748] [2023-08-26 11:45:45,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127912748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:45:45,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:45:45,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:45:45,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562415539] [2023-08-26 11:45:45,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:45:45,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:45:45,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:45:45,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:45:45,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:45:45,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 209 [2023-08-26 11:45:45,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:45:45,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:45:45,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 209 [2023-08-26 11:45:45,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:46:09,222 INFO L124 PetriNetUnfolderBase]: 284997/383491 cut-off events. [2023-08-26 11:46:09,223 INFO L125 PetriNetUnfolderBase]: For 15040/15040 co-relation queries the response was YES. [2023-08-26 11:46:10,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777626 conditions, 383491 events. 284997/383491 cut-off events. For 15040/15040 co-relation queries the response was YES. Maximal size of possible extension queue 17491. Compared 2980369 event pairs, 166227 based on Foata normal form. 0/350230 useless extension candidates. Maximal degree in co-relation 777614. Up to 225767 conditions per place. [2023-08-26 11:46:11,876 INFO L140 encePairwiseOnDemand]: 189/209 looper letters, 60 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2023-08-26 11:46:11,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 338 flow [2023-08-26 11:46:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:46:11,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:46:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-26 11:46:11,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098883572567783 [2023-08-26 11:46:11,878 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-26 11:46:11,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-26 11:46:11,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:46:11,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-26 11:46:11,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:11,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:11,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:11,880 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 116 flow. Second operand 3 states and 257 transitions. [2023-08-26 11:46:11,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 338 flow [2023-08-26 11:46:11,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 74 transitions, 337 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:46:11,927 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 217 flow [2023-08-26 11:46:11,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-08-26 11:46:11,928 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2023-08-26 11:46:11,928 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 217 flow [2023-08-26 11:46:11,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:11,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:46:11,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:46:11,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:46:11,929 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:46:11,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:46:11,929 INFO L85 PathProgramCache]: Analyzing trace with hash 359542441, now seen corresponding path program 1 times [2023-08-26 11:46:11,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:46:11,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648175912] [2023-08-26 11:46:11,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:46:11,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:46:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:46:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:46:11,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:46:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648175912] [2023-08-26 11:46:11,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648175912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:46:11,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:46:11,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:46:11,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40480952] [2023-08-26 11:46:11,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:46:11,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:46:11,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:46:11,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:46:11,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:46:11,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 209 [2023-08-26 11:46:11,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:11,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:46:11,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 209 [2023-08-26 11:46:11,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:46:12,099 INFO L124 PetriNetUnfolderBase]: 405/1641 cut-off events. [2023-08-26 11:46:12,099 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-08-26 11:46:12,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3730 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13487 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 3715. Up to 436 conditions per place. [2023-08-26 11:46:12,107 INFO L140 encePairwiseOnDemand]: 199/209 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-08-26 11:46:12,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 40 transitions, 215 flow [2023-08-26 11:46:12,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:46:12,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:46:12,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 264 transitions. [2023-08-26 11:46:12,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-08-26 11:46:12,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 264 transitions. [2023-08-26 11:46:12,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 264 transitions. [2023-08-26 11:46:12,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:46:12,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 264 transitions. [2023-08-26 11:46:12,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:12,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:12,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:12,111 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 217 flow. Second operand 3 states and 264 transitions. [2023-08-26 11:46:12,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 40 transitions, 215 flow [2023-08-26 11:46:12,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 11:46:12,116 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 117 flow [2023-08-26 11:46:12,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-26 11:46:12,117 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, -13 predicate places. [2023-08-26 11:46:12,117 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 117 flow [2023-08-26 11:46:12,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:12,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:46:12,117 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:46:12,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 11:46:12,117 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 11:46:12,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:46:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash 664507919, now seen corresponding path program 1 times [2023-08-26 11:46:12,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:46:12,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840602167] [2023-08-26 11:46:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:46:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:46:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:46:12,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:46:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:46:12,136 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:46:12,136 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:46:12,137 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-26 11:46:12,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (7 of 9 remaining) [2023-08-26 11:46:12,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 11:46:12,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 11:46:12,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 9 remaining) [2023-08-26 11:46:12,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 11:46:12,138 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 9 remaining) [2023-08-26 11:46:12,138 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 9 remaining) [2023-08-26 11:46:12,138 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 11:46:12,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 11:46:12,138 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 11:46:12,139 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:46:12,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 11:46:12,158 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:46:12,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 129 transitions, 318 flow [2023-08-26 11:46:12,173 INFO L124 PetriNetUnfolderBase]: 19/211 cut-off events. [2023-08-26 11:46:12,173 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 11:46:12,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 211 events. 19/211 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 522 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 201. Up to 14 conditions per place. [2023-08-26 11:46:12,174 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 129 transitions, 318 flow [2023-08-26 11:46:12,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 129 transitions, 318 flow [2023-08-26 11:46:12,175 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:46:12,175 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 129 transitions, 318 flow [2023-08-26 11:46:12,176 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 129 transitions, 318 flow [2023-08-26 11:46:12,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 129 transitions, 318 flow [2023-08-26 11:46:12,190 INFO L124 PetriNetUnfolderBase]: 19/211 cut-off events. [2023-08-26 11:46:12,190 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 11:46:12,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 211 events. 19/211 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 522 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 201. Up to 14 conditions per place. [2023-08-26 11:46:12,198 INFO L119 LiptonReduction]: Number of co-enabled transitions 11040 [2023-08-26 11:46:13,635 INFO L134 LiptonReduction]: Checked pairs total: 47148 [2023-08-26 11:46:13,636 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-26 11:46:13,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:46:13,637 INFO L357 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@10618e80, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:46:13,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 11:46:13,638 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:46:13,638 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:46:13,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:46:13,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:46:13,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:46:13,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:46:13,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:46:13,639 INFO L85 PathProgramCache]: Analyzing trace with hash 38810, now seen corresponding path program 1 times [2023-08-26 11:46:13,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:46:13,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590213320] [2023-08-26 11:46:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:46:13,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:46:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:46:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:46:13,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:46:13,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590213320] [2023-08-26 11:46:13,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590213320] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:46:13,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:46:13,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:46:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092706826] [2023-08-26 11:46:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:46:13,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:46:13,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:46:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:46:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:46:13,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 241 [2023-08-26 11:46:13,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 74 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:13,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:46:13,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 241 [2023-08-26 11:46:13,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:46:33,389 INFO L124 PetriNetUnfolderBase]: 200813/284647 cut-off events. [2023-08-26 11:46:33,390 INFO L125 PetriNetUnfolderBase]: For 95048/95048 co-relation queries the response was YES. [2023-08-26 11:46:34,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568478 conditions, 284647 events. 200813/284647 cut-off events. For 95048/95048 co-relation queries the response was YES. Maximal size of possible extension queue 14804. Compared 2575664 event pairs, 200813 based on Foata normal form. 100806/320245 useless extension candidates. Maximal degree in co-relation 98687. Up to 247706 conditions per place. [2023-08-26 11:46:35,409 INFO L140 encePairwiseOnDemand]: 226/241 looper letters, 31 selfloop transitions, 1 changer transitions 0/53 dead transitions. [2023-08-26 11:46:35,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 53 transitions, 230 flow [2023-08-26 11:46:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:46:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:46:35,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-08-26 11:46:35,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40387275242047027 [2023-08-26 11:46:35,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-08-26 11:46:35,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-08-26 11:46:35,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:46:35,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-08-26 11:46:35,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:35,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:35,413 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:35,413 INFO L175 Difference]: Start difference. First operand has 75 places, 74 transitions, 208 flow. Second operand 3 states and 292 transitions. [2023-08-26 11:46:35,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 53 transitions, 230 flow [2023-08-26 11:46:35,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 53 transitions, 200 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-08-26 11:46:35,551 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 138 flow [2023-08-26 11:46:35,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-26 11:46:35,551 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2023-08-26 11:46:35,552 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 138 flow [2023-08-26 11:46:35,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:35,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:46:35,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:46:35,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 11:46:35,552 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:46:35,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:46:35,553 INFO L85 PathProgramCache]: Analyzing trace with hash 38811, now seen corresponding path program 1 times [2023-08-26 11:46:35,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:46:35,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724585541] [2023-08-26 11:46:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:46:35,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:46:35,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:46:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:46:35,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:46:35,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724585541] [2023-08-26 11:46:35,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724585541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:46:35,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:46:35,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:46:35,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307025924] [2023-08-26 11:46:35,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:46:35,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:46:35,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:46:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:46:35,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:46:35,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 241 [2023-08-26 11:46:35,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:35,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:46:35,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 241 [2023-08-26 11:46:35,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:46:48,193 INFO L124 PetriNetUnfolderBase]: 129709/188519 cut-off events. [2023-08-26 11:46:48,194 INFO L125 PetriNetUnfolderBase]: For 8128/8128 co-relation queries the response was YES. [2023-08-26 11:46:48,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361392 conditions, 188519 events. 129709/188519 cut-off events. For 8128/8128 co-relation queries the response was YES. Maximal size of possible extension queue 10123. Compared 1709525 event pairs, 129709 based on Foata normal form. 0/153793 useless extension candidates. Maximal degree in co-relation 361380. Up to 160971 conditions per place. [2023-08-26 11:46:49,550 INFO L140 encePairwiseOnDemand]: 239/241 looper letters, 30 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-26 11:46:49,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 52 transitions, 198 flow [2023-08-26 11:46:49,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:46:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:46:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 275 transitions. [2023-08-26 11:46:49,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38035961272475793 [2023-08-26 11:46:49,552 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 275 transitions. [2023-08-26 11:46:49,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 275 transitions. [2023-08-26 11:46:49,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:46:49,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 275 transitions. [2023-08-26 11:46:49,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:49,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:49,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:49,554 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 138 flow. Second operand 3 states and 275 transitions. [2023-08-26 11:46:49,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 52 transitions, 198 flow [2023-08-26 11:46:49,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 52 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:46:49,556 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 137 flow [2023-08-26 11:46:49,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=241, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2023-08-26 11:46:49,556 INFO L281 CegarLoopForPetriNet]: 75 programPoint places, -7 predicate places. [2023-08-26 11:46:49,556 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 137 flow [2023-08-26 11:46:49,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:49,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:46:49,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:46:49,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 11:46:49,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 11:46:49,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:46:49,557 INFO L85 PathProgramCache]: Analyzing trace with hash -223428169, now seen corresponding path program 1 times [2023-08-26 11:46:49,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:46:49,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868402064] [2023-08-26 11:46:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:46:49,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:46:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:46:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:46:49,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:46:49,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868402064] [2023-08-26 11:46:49,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868402064] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:46:49,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:46:49,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:46:49,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854619181] [2023-08-26 11:46:49,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:46:49,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:46:49,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:46:49,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:46:49,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:46:49,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 241 [2023-08-26 11:46:49,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:46:49,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:46:49,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 241 [2023-08-26 11:46:49,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand