/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/26_stack_cas_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:48:26,756 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:48:26,827 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 11:48:26,831 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:48:26,831 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:48:26,859 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:48:26,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:48:26,860 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:48:26,861 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:48:26,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:48:26,864 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:48:26,864 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:48:26,865 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:48:26,866 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:48:26,866 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:48:26,866 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:48:26,866 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:48:26,866 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:48:26,866 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:48:26,866 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:48:26,867 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:48:26,867 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:48:26,867 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:48:26,868 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:48:26,868 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:48:26,868 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:48:26,868 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:48:26,868 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:48:26,869 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:48:26,869 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:48:26,869 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:48:26,870 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:48:26,870 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:48:26,870 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:48:26,870 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:48:26,870 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:48:27,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:48:27,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:48:27,129 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:48:27,130 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:48:27,130 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:48:27,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-08-26 11:48:28,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:48:28,473 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:48:28,474 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longer-2.i [2023-08-26 11:48:28,485 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f463adb7/92a1a6e8303147f9ba2f3d69ca781233/FLAG16c38eab4 [2023-08-26 11:48:28,494 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f463adb7/92a1a6e8303147f9ba2f3d69ca781233 [2023-08-26 11:48:28,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:48:28,496 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:48:28,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:48:28,497 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:48:28,498 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:48:28,501 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:28,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1080ac10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28, skipping insertion in model container [2023-08-26 11:48:28,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:28,534 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:48:28,846 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:48:28,857 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:48:28,876 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 11:48:28,893 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 11:48:28,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:48:28,943 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:48:28,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28 WrapperNode [2023-08-26 11:48:28,944 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:48:28,945 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:48:28,945 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:48:28,945 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:48:28,949 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:28,986 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,005 INFO L138 Inliner]: procedures = 177, calls = 48, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 193 [2023-08-26 11:48:29,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:48:29,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:48:29,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:48:29,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:48:29,014 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,029 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,034 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,037 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,038 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,039 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,049 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:48:29,050 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:48:29,050 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:48:29,050 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:48:29,051 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (1/1) ... [2023-08-26 11:48:29,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:48:29,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:48:29,078 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 11:48:29,083 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 11:48:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:48:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:48:29,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:48:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:48:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:48:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:48:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:48:29,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:48:29,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:48:29,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:48:29,101 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 11:48:29,216 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:48:29,218 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:48:29,512 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:48:29,650 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:48:29,650 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 11:48:29,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:48:29 BoogieIcfgContainer [2023-08-26 11:48:29,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:48:29,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:48:29,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:48:29,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:48:29,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:48:28" (1/3) ... [2023-08-26 11:48:29,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c61ca7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:48:29, skipping insertion in model container [2023-08-26 11:48:29,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:48:28" (2/3) ... [2023-08-26 11:48:29,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c61ca7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:48:29, skipping insertion in model container [2023-08-26 11:48:29,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:48:29" (3/3) ... [2023-08-26 11:48:29,657 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longer-2.i [2023-08-26 11:48:29,670 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:48:29,670 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-08-26 11:48:29,670 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:48:29,778 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:48:29,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 11:48:29,871 INFO L124 PetriNetUnfolderBase]: 11/168 cut-off events. [2023-08-26 11:48:29,871 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:48:29,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 168 events. 11/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 303 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 132. Up to 4 conditions per place. [2023-08-26 11:48:29,877 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 11:48:29,883 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 156 transitions, 317 flow [2023-08-26 11:48:29,886 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:48:29,896 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 156 transitions, 317 flow [2023-08-26 11:48:29,899 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 156 transitions, 317 flow [2023-08-26 11:48:29,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 11:48:29,940 INFO L124 PetriNetUnfolderBase]: 11/168 cut-off events. [2023-08-26 11:48:29,941 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:48:29,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 168 events. 11/168 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 303 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 132. Up to 4 conditions per place. [2023-08-26 11:48:29,947 INFO L119 LiptonReduction]: Number of co-enabled transitions 3540 [2023-08-26 11:48:35,279 INFO L134 LiptonReduction]: Checked pairs total: 5664 [2023-08-26 11:48:35,279 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-08-26 11:48:35,288 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:48:35,292 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;@7961df95, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:48:35,292 INFO L358 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2023-08-26 11:48:35,293 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:48:35,293 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 11:48:35,293 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:48:35,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:35,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:48:35,294 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:48:35,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:35,297 INFO L85 PathProgramCache]: Analyzing trace with hash 31782, now seen corresponding path program 1 times [2023-08-26 11:48:35,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:35,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028512114] [2023-08-26 11:48:35,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:35,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:35,510 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 11:48:35,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:35,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028512114] [2023-08-26 11:48:35,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028512114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:35,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:35,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:48:35,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040959160] [2023-08-26 11:48:35,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:35,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:48:35,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:35,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:48:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:48:35,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 327 [2023-08-26 11:48:35,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 68 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 11:48:35,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:35,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 327 [2023-08-26 11:48:35,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:35,724 INFO L124 PetriNetUnfolderBase]: 246/539 cut-off events. [2023-08-26 11:48:35,724 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:48:35,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 539 events. 246/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2377 event pairs, 126 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 1050. Up to 282 conditions per place. [2023-08-26 11:48:35,732 INFO L140 encePairwiseOnDemand]: 303/327 looper letters, 78 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-26 11:48:35,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 83 transitions, 335 flow [2023-08-26 11:48:35,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:35,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-26 11:48:35,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38837920489296635 [2023-08-26 11:48:35,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-26 11:48:35,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-26 11:48:35,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:35,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-26 11:48:35,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 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 11:48:35,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:35,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:35,765 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 141 flow. Second operand 3 states and 381 transitions. [2023-08-26 11:48:35,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 83 transitions, 335 flow [2023-08-26 11:48:35,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 335 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:48:35,770 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 133 flow [2023-08-26 11:48:35,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2023-08-26 11:48:35,774 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -13 predicate places. [2023-08-26 11:48:35,774 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 133 flow [2023-08-26 11:48:35,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 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 11:48:35,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:35,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:48:35,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:48:35,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:48:35,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash 31784, now seen corresponding path program 1 times [2023-08-26 11:48:35,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:35,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715152658] [2023-08-26 11:48:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:35,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:35,894 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 11:48:35,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:35,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715152658] [2023-08-26 11:48:35,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715152658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:35,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:35,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:48:35,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574667783] [2023-08-26 11:48:35,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:35,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:48:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:35,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:48:35,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:48:35,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 327 [2023-08-26 11:48:35,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 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 11:48:35,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:35,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 327 [2023-08-26 11:48:35,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:35,968 INFO L124 PetriNetUnfolderBase]: 172/402 cut-off events. [2023-08-26 11:48:35,968 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-08-26 11:48:35,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 402 events. 172/402 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1677 event pairs, 120 based on Foata normal form. 61/319 useless extension candidates. Maximal degree in co-relation 905. Up to 385 conditions per place. [2023-08-26 11:48:35,970 INFO L140 encePairwiseOnDemand]: 325/327 looper letters, 48 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-26 11:48:35,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 229 flow [2023-08-26 11:48:35,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 11:48:35,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292558613659531 [2023-08-26 11:48:35,971 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 11:48:35,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 11:48:35,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:35,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 11:48:35,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 11:48:35,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:35,975 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:35,975 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 133 flow. Second operand 3 states and 323 transitions. [2023-08-26 11:48:35,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 229 flow [2023-08-26 11:48:35,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 221 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:48:35,977 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 125 flow [2023-08-26 11:48:35,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-26 11:48:35,978 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-08-26 11:48:35,978 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 125 flow [2023-08-26 11:48:35,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 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 11:48:35,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:35,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:48:35,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:48:35,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:48:35,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:35,979 INFO L85 PathProgramCache]: Analyzing trace with hash 30568877, now seen corresponding path program 1 times [2023-08-26 11:48:35,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:35,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027799570] [2023-08-26 11:48:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:35,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:36,067 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 11:48:36,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:36,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027799570] [2023-08-26 11:48:36,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027799570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:36,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:36,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:48:36,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767126142] [2023-08-26 11:48:36,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:36,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:48:36,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:48:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:48:36,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 327 [2023-08-26 11:48:36,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 11:48:36,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:36,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 327 [2023-08-26 11:48:36,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:36,219 INFO L124 PetriNetUnfolderBase]: 176/424 cut-off events. [2023-08-26 11:48:36,219 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-26 11:48:36,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 424 events. 176/424 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1873 event pairs, 116 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 953. Up to 246 conditions per place. [2023-08-26 11:48:36,221 INFO L140 encePairwiseOnDemand]: 322/327 looper letters, 73 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-26 11:48:36,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 333 flow [2023-08-26 11:48:36,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-26 11:48:36,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34046890927624873 [2023-08-26 11:48:36,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-26 11:48:36,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-26 11:48:36,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:36,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-26 11:48:36,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 11:48:36,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:36,225 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:36,225 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 125 flow. Second operand 3 states and 334 transitions. [2023-08-26 11:48:36,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 333 flow [2023-08-26 11:48:36,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 77 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:48:36,227 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 141 flow [2023-08-26 11:48:36,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-26 11:48:36,228 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-08-26 11:48:36,228 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 141 flow [2023-08-26 11:48:36,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.0) internal successors, (348), 4 states have internal predecessors, (348), 0 states have call successors, (0), 0 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 11:48:36,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:36,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:48:36,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:48:36,228 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:48:36,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:36,229 INFO L85 PathProgramCache]: Analyzing trace with hash 30569005, now seen corresponding path program 1 times [2023-08-26 11:48:36,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:36,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760190878] [2023-08-26 11:48:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:36,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:36,279 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 11:48:36,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:36,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760190878] [2023-08-26 11:48:36,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760190878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:36,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:36,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:48:36,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301722816] [2023-08-26 11:48:36,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:36,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:48:36,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:48:36,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:48:36,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 327 [2023-08-26 11:48:36,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 11:48:36,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:36,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 327 [2023-08-26 11:48:36,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:36,344 INFO L124 PetriNetUnfolderBase]: 161/405 cut-off events. [2023-08-26 11:48:36,344 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-26 11:48:36,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 405 events. 161/405 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1795 event pairs, 129 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 912. Up to 375 conditions per place. [2023-08-26 11:48:36,346 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 45 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-26 11:48:36,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 48 transitions, 227 flow [2023-08-26 11:48:36,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-26 11:48:36,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32619775739041795 [2023-08-26 11:48:36,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-26 11:48:36,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-26 11:48:36,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:36,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-26 11:48:36,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 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 11:48:36,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:36,350 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:36,350 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 141 flow. Second operand 3 states and 320 transitions. [2023-08-26 11:48:36,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 48 transitions, 227 flow [2023-08-26 11:48:36,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 48 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:48:36,352 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 134 flow [2023-08-26 11:48:36,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=48, PETRI_TRANSITIONS=48} [2023-08-26 11:48:36,352 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -16 predicate places. [2023-08-26 11:48:36,353 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 134 flow [2023-08-26 11:48:36,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 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 11:48:36,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:36,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:48:36,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:48:36,353 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:48:36,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash 30568878, now seen corresponding path program 1 times [2023-08-26 11:48:36,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:36,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731054164] [2023-08-26 11:48:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:36,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:36,422 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 11:48:36,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:36,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731054164] [2023-08-26 11:48:36,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731054164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:36,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:36,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:48:36,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555239839] [2023-08-26 11:48:36,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:48:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:48:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:48:36,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 327 [2023-08-26 11:48:36,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 11:48:36,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:36,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 327 [2023-08-26 11:48:36,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:36,486 INFO L124 PetriNetUnfolderBase]: 157/394 cut-off events. [2023-08-26 11:48:36,486 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 11:48:36,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 894 conditions, 394 events. 157/394 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1733 event pairs, 125 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 882. Up to 365 conditions per place. [2023-08-26 11:48:36,488 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 43 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-26 11:48:36,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 218 flow [2023-08-26 11:48:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 11:48:36,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292558613659531 [2023-08-26 11:48:36,489 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 11:48:36,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 11:48:36,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:36,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 11:48:36,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 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 11:48:36,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:36,492 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 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 11:48:36,492 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 134 flow. Second operand 3 states and 323 transitions. [2023-08-26 11:48:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 218 flow [2023-08-26 11:48:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:48:36,494 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 131 flow [2023-08-26 11:48:36,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-08-26 11:48:36,494 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -17 predicate places. [2023-08-26 11:48:36,494 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 131 flow [2023-08-26 11:48:36,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 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 11:48:36,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:36,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:48:36,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:48:36,495 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:48:36,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash 947636045, now seen corresponding path program 1 times [2023-08-26 11:48:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:36,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597370378] [2023-08-26 11:48:36,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:36,538 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 11:48:36,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597370378] [2023-08-26 11:48:36,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597370378] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:36,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:36,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:48:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004812200] [2023-08-26 11:48:36,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:48:36,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:48:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:48:36,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 327 [2023-08-26 11:48:36,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 11:48:36,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:36,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 327 [2023-08-26 11:48:36,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:36,650 INFO L124 PetriNetUnfolderBase]: 161/374 cut-off events. [2023-08-26 11:48:36,650 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-26 11:48:36,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 374 events. 161/374 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1508 event pairs, 76 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 850. Up to 137 conditions per place. [2023-08-26 11:48:36,652 INFO L140 encePairwiseOnDemand]: 318/327 looper letters, 63 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-08-26 11:48:36,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 329 flow [2023-08-26 11:48:36,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:48:36,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:48:36,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 410 transitions. [2023-08-26 11:48:36,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31345565749235477 [2023-08-26 11:48:36,653 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 410 transitions. [2023-08-26 11:48:36,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 410 transitions. [2023-08-26 11:48:36,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:36,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 410 transitions. [2023-08-26 11:48:36,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:48:36,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 11:48:36,656 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 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 11:48:36,656 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 131 flow. Second operand 4 states and 410 transitions. [2023-08-26 11:48:36,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 329 flow [2023-08-26 11:48:36,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 72 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:48:36,658 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 170 flow [2023-08-26 11:48:36,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-26 11:48:36,658 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-08-26 11:48:36,659 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 170 flow [2023-08-26 11:48:36,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 85.25) internal successors, (341), 4 states have internal predecessors, (341), 0 states have call successors, (0), 0 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 11:48:36,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:36,659 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 11:48:36,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:48:36,659 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:48:36,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:36,659 INFO L85 PathProgramCache]: Analyzing trace with hash -687988900, now seen corresponding path program 1 times [2023-08-26 11:48:36,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:36,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029225734] [2023-08-26 11:48:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:36,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:48:36,666 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:48:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:48:36,682 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:48:36,682 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:48:36,683 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (80 of 81 remaining) [2023-08-26 11:48:36,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 81 remaining) [2023-08-26 11:48:36,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 81 remaining) [2023-08-26 11:48:36,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 81 remaining) [2023-08-26 11:48:36,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 81 remaining) [2023-08-26 11:48:36,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 81 remaining) [2023-08-26 11:48:36,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 81 remaining) [2023-08-26 11:48:36,684 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 81 remaining) [2023-08-26 11:48:36,685 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (57 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (54 of 81 remaining) [2023-08-26 11:48:36,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (51 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 81 remaining) [2023-08-26 11:48:36,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 81 remaining) [2023-08-26 11:48:36,688 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 81 remaining) [2023-08-26 11:48:36,689 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 81 remaining) [2023-08-26 11:48:36,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (10 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 81 remaining) [2023-08-26 11:48:36,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 81 remaining) [2023-08-26 11:48:36,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 81 remaining) [2023-08-26 11:48:36,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:48:36,692 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:48:36,693 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:48:36,694 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 11:48:36,781 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:48:36,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 275 transitions, 562 flow [2023-08-26 11:48:36,866 INFO L124 PetriNetUnfolderBase]: 21/301 cut-off events. [2023-08-26 11:48:36,866 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:48:36,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 301 events. 21/301 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 886 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 250. Up to 6 conditions per place. [2023-08-26 11:48:36,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 275 transitions, 562 flow [2023-08-26 11:48:36,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 275 transitions, 562 flow [2023-08-26 11:48:36,872 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:48:36,872 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 275 transitions, 562 flow [2023-08-26 11:48:36,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 275 transitions, 562 flow [2023-08-26 11:48:36,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 275 transitions, 562 flow [2023-08-26 11:48:36,919 INFO L124 PetriNetUnfolderBase]: 21/301 cut-off events. [2023-08-26 11:48:36,919 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:48:36,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 301 events. 21/301 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 886 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 250. Up to 6 conditions per place. [2023-08-26 11:48:36,931 INFO L119 LiptonReduction]: Number of co-enabled transitions 35164 [2023-08-26 11:48:42,380 INFO L134 LiptonReduction]: Checked pairs total: 103486 [2023-08-26 11:48:42,381 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-08-26 11:48:42,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:48:42,383 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;@7961df95, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:48:42,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 120 error locations. [2023-08-26 11:48:42,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:48:42,384 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:48:42,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:48:42,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:42,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:48:42,384 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:48:42,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash 51719, now seen corresponding path program 1 times [2023-08-26 11:48:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:42,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307211572] [2023-08-26 11:48:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:42,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:48:42,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:42,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307211572] [2023-08-26 11:48:42,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307211572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:42,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:42,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:48:42,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472663060] [2023-08-26 11:48:42,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:42,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:48:42,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:42,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:48:42,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:48:42,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 504 [2023-08-26 11:48:42,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 144 transitions, 300 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 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 11:48:42,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:42,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 504 [2023-08-26 11:48:42,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:44,940 INFO L124 PetriNetUnfolderBase]: 21706/35516 cut-off events. [2023-08-26 11:48:44,940 INFO L125 PetriNetUnfolderBase]: For 433/433 co-relation queries the response was YES. [2023-08-26 11:48:44,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69615 conditions, 35516 events. 21706/35516 cut-off events. For 433/433 co-relation queries the response was YES. Maximal size of possible extension queue 1905. Compared 307149 event pairs, 9345 based on Foata normal form. 557/14286 useless extension candidates. Maximal degree in co-relation 55952. Up to 18162 conditions per place. [2023-08-26 11:48:45,135 INFO L140 encePairwiseOnDemand]: 468/504 looper letters, 183 selfloop transitions, 6 changer transitions 0/208 dead transitions. [2023-08-26 11:48:45,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 208 transitions, 811 flow [2023-08-26 11:48:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-08-26 11:48:45,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695767195767196 [2023-08-26 11:48:45,138 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-08-26 11:48:45,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-08-26 11:48:45,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:45,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-08-26 11:48:45,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.66666666666666) internal successors, (710), 3 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 11:48:45,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 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 11:48:45,142 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 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 11:48:45,142 INFO L175 Difference]: Start difference. First operand has 135 places, 144 transitions, 300 flow. Second operand 3 states and 710 transitions. [2023-08-26 11:48:45,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 208 transitions, 811 flow [2023-08-26 11:48:45,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 208 transitions, 809 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:48:45,145 INFO L231 Difference]: Finished difference. Result has 114 places, 120 transitions, 286 flow [2023-08-26 11:48:45,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=114, PETRI_TRANSITIONS=120} [2023-08-26 11:48:45,147 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -21 predicate places. [2023-08-26 11:48:45,147 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 120 transitions, 286 flow [2023-08-26 11:48:45,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 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 11:48:45,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:45,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:48:45,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:48:45,147 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:48:45,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:45,148 INFO L85 PathProgramCache]: Analyzing trace with hash 51717, now seen corresponding path program 1 times [2023-08-26 11:48:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:45,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704397965] [2023-08-26 11:48:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:45,190 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 11:48:45,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:45,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704397965] [2023-08-26 11:48:45,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704397965] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:45,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:45,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:48:45,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047920694] [2023-08-26 11:48:45,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:45,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:48:45,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:45,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:48:45,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:48:45,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 504 [2023-08-26 11:48:45,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 120 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 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 11:48:45,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:45,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 504 [2023-08-26 11:48:45,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:46,877 INFO L124 PetriNetUnfolderBase]: 14642/24293 cut-off events. [2023-08-26 11:48:46,878 INFO L125 PetriNetUnfolderBase]: For 9060/9060 co-relation queries the response was YES. [2023-08-26 11:48:46,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55561 conditions, 24293 events. 14642/24293 cut-off events. For 9060/9060 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 198528 event pairs, 11431 based on Foata normal form. 3266/15911 useless extension candidates. Maximal degree in co-relation 45557. Up to 23072 conditions per place. [2023-08-26 11:48:47,007 INFO L140 encePairwiseOnDemand]: 502/504 looper letters, 99 selfloop transitions, 1 changer transitions 0/119 dead transitions. [2023-08-26 11:48:47,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 119 transitions, 484 flow [2023-08-26 11:48:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:47,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-08-26 11:48:47,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38293650793650796 [2023-08-26 11:48:47,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-08-26 11:48:47,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-08-26 11:48:47,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:47,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-08-26 11:48:47,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 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 11:48:47,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 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 11:48:47,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 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 11:48:47,013 INFO L175 Difference]: Start difference. First operand has 114 places, 120 transitions, 286 flow. Second operand 3 states and 579 transitions. [2023-08-26 11:48:47,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 119 transitions, 484 flow [2023-08-26 11:48:47,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 119 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:48:47,042 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 274 flow [2023-08-26 11:48:47,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2023-08-26 11:48:47,044 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -22 predicate places. [2023-08-26 11:48:47,045 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 274 flow [2023-08-26 11:48:47,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 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 11:48:47,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:47,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:48:47,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:48:47,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:48:47,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:47,047 INFO L85 PathProgramCache]: Analyzing trace with hash 49744532, now seen corresponding path program 1 times [2023-08-26 11:48:47,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:47,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904289102] [2023-08-26 11:48:47,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:47,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:47,143 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 11:48:47,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:47,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904289102] [2023-08-26 11:48:47,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904289102] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:47,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:47,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:48:47,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733482116] [2023-08-26 11:48:47,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:47,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:48:47,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:47,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:48:47,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:48:47,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 504 [2023-08-26 11:48:47,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 119 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 11:48:47,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:47,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 504 [2023-08-26 11:48:47,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:48,837 INFO L124 PetriNetUnfolderBase]: 13478/22320 cut-off events. [2023-08-26 11:48:48,837 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2023-08-26 11:48:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49263 conditions, 22320 events. 13478/22320 cut-off events. For 3470/3470 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 179990 event pairs, 10457 based on Foata normal form. 0/10320 useless extension candidates. Maximal degree in co-relation 49253. Up to 21216 conditions per place. [2023-08-26 11:48:48,925 INFO L140 encePairwiseOnDemand]: 499/504 looper letters, 95 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-08-26 11:48:48,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 115 transitions, 458 flow [2023-08-26 11:48:48,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-26 11:48:48,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2023-08-26 11:48:48,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-26 11:48:48,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-26 11:48:48,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:48,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-26 11:48:48,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.66666666666666) internal successors, (584), 3 states have internal predecessors, (584), 0 states have call successors, (0), 0 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 11:48:48,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 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 11:48:48,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 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 11:48:48,930 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 274 flow. Second operand 3 states and 584 transitions. [2023-08-26 11:48:48,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 115 transitions, 458 flow [2023-08-26 11:48:48,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 115 transitions, 457 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:48:48,933 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 267 flow [2023-08-26 11:48:48,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=267, PETRI_PLACES=110, PETRI_TRANSITIONS=115} [2023-08-26 11:48:48,934 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -25 predicate places. [2023-08-26 11:48:48,934 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 267 flow [2023-08-26 11:48:48,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 11:48:48,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:48,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:48:48,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:48:48,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:48:48,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:48,935 INFO L85 PathProgramCache]: Analyzing trace with hash 49744531, now seen corresponding path program 1 times [2023-08-26 11:48:48,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:48,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825439974] [2023-08-26 11:48:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:48,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:48,991 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 11:48:48,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:48,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825439974] [2023-08-26 11:48:48,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825439974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:48,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:48,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:48:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869700314] [2023-08-26 11:48:48,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:48,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:48:48,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:48,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:48:48,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:48:48,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 504 [2023-08-26 11:48:48,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 115 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 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 11:48:48,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:48,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 504 [2023-08-26 11:48:48,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:51,802 INFO L124 PetriNetUnfolderBase]: 25620/43514 cut-off events. [2023-08-26 11:48:51,802 INFO L125 PetriNetUnfolderBase]: For 6072/6072 co-relation queries the response was YES. [2023-08-26 11:48:51,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93939 conditions, 43514 events. 25620/43514 cut-off events. For 6072/6072 co-relation queries the response was YES. Maximal size of possible extension queue 2480. Compared 407062 event pairs, 6985 based on Foata normal form. 0/20586 useless extension candidates. Maximal degree in co-relation 93928. Up to 17126 conditions per place. [2023-08-26 11:48:52,008 INFO L140 encePairwiseOnDemand]: 491/504 looper letters, 242 selfloop transitions, 17 changer transitions 0/278 dead transitions. [2023-08-26 11:48:52,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 278 transitions, 1148 flow [2023-08-26 11:48:52,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:48:52,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:48:52,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 863 transitions. [2023-08-26 11:48:52,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280753968253968 [2023-08-26 11:48:52,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 863 transitions. [2023-08-26 11:48:52,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 863 transitions. [2023-08-26 11:48:52,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:52,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 863 transitions. [2023-08-26 11:48:52,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.75) internal successors, (863), 4 states have internal predecessors, (863), 0 states have call successors, (0), 0 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 11:48:52,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 504.0) internal successors, (2520), 5 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 11:48:52,015 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 504.0) internal successors, (2520), 5 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 11:48:52,015 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 267 flow. Second operand 4 states and 863 transitions. [2023-08-26 11:48:52,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 278 transitions, 1148 flow [2023-08-26 11:48:52,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 278 transitions, 1147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:48:52,019 INFO L231 Difference]: Finished difference. Result has 115 places, 131 transitions, 426 flow [2023-08-26 11:48:52,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=426, PETRI_PLACES=115, PETRI_TRANSITIONS=131} [2023-08-26 11:48:52,020 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -20 predicate places. [2023-08-26 11:48:52,020 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 131 transitions, 426 flow [2023-08-26 11:48:52,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 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 11:48:52,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:52,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:48:52,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:48:52,020 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:48:52,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:52,020 INFO L85 PathProgramCache]: Analyzing trace with hash 559893078, now seen corresponding path program 1 times [2023-08-26 11:48:52,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:52,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120818664] [2023-08-26 11:48:52,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:52,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:52,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:52,057 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 11:48:52,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:52,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120818664] [2023-08-26 11:48:52,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120818664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:52,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:52,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:48:52,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800353444] [2023-08-26 11:48:52,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:52,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:48:52,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:52,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:48:52,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:48:52,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 504 [2023-08-26 11:48:52,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 131 transitions, 426 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:48:52,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:52,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 504 [2023-08-26 11:48:52,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:54,627 INFO L124 PetriNetUnfolderBase]: 21480/36206 cut-off events. [2023-08-26 11:48:54,628 INFO L125 PetriNetUnfolderBase]: For 12109/12109 co-relation queries the response was YES. [2023-08-26 11:48:54,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83405 conditions, 36206 events. 21480/36206 cut-off events. For 12109/12109 co-relation queries the response was YES. Maximal size of possible extension queue 2026. Compared 328282 event pairs, 17193 based on Foata normal form. 0/18968 useless extension candidates. Maximal degree in co-relation 83390. Up to 33772 conditions per place. [2023-08-26 11:48:54,907 INFO L140 encePairwiseOnDemand]: 495/504 looper letters, 104 selfloop transitions, 1 changer transitions 0/123 dead transitions. [2023-08-26 11:48:54,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 123 transitions, 620 flow [2023-08-26 11:48:54,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:48:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:48:54,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-08-26 11:48:54,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37632275132275134 [2023-08-26 11:48:54,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-08-26 11:48:54,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-08-26 11:48:54,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:54,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-08-26 11:48:54,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 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 11:48:54,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 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 11:48:54,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 504.0) internal successors, (2016), 4 states have internal predecessors, (2016), 0 states have call successors, (0), 0 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 11:48:54,912 INFO L175 Difference]: Start difference. First operand has 115 places, 131 transitions, 426 flow. Second operand 3 states and 569 transitions. [2023-08-26 11:48:54,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 123 transitions, 620 flow [2023-08-26 11:48:54,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 123 transitions, 620 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:48:54,939 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 412 flow [2023-08-26 11:48:54,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=109, PETRI_TRANSITIONS=123} [2023-08-26 11:48:54,940 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -26 predicate places. [2023-08-26 11:48:54,940 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 412 flow [2023-08-26 11:48:54,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:48:54,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:54,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:48:54,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:48:54,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:48:54,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash 559893077, now seen corresponding path program 1 times [2023-08-26 11:48:54,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:54,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059154164] [2023-08-26 11:48:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:54,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:54,979 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 11:48:54,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059154164] [2023-08-26 11:48:54,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059154164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:54,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:54,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:48:54,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720321329] [2023-08-26 11:48:54,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:54,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:48:54,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:54,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:48:54,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:48:54,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 504 [2023-08-26 11:48:54,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 123 transitions, 412 flow. Second operand has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 11:48:54,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:54,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 504 [2023-08-26 11:48:54,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:48:58,031 INFO L124 PetriNetUnfolderBase]: 25712/43929 cut-off events. [2023-08-26 11:48:58,031 INFO L125 PetriNetUnfolderBase]: For 14745/14745 co-relation queries the response was YES. [2023-08-26 11:48:58,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100710 conditions, 43929 events. 25712/43929 cut-off events. For 14745/14745 co-relation queries the response was YES. Maximal size of possible extension queue 2521. Compared 417033 event pairs, 7600 based on Foata normal form. 0/23979 useless extension candidates. Maximal degree in co-relation 100693. Up to 21346 conditions per place. [2023-08-26 11:48:58,262 INFO L140 encePairwiseOnDemand]: 473/504 looper letters, 210 selfloop transitions, 39 changer transitions 0/267 dead transitions. [2023-08-26 11:48:58,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 267 transitions, 1308 flow [2023-08-26 11:48:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:48:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:48:58,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 829 transitions. [2023-08-26 11:48:58,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41121031746031744 [2023-08-26 11:48:58,264 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 829 transitions. [2023-08-26 11:48:58,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 829 transitions. [2023-08-26 11:48:58,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:48:58,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 829 transitions. [2023-08-26 11:48:58,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 207.25) internal successors, (829), 4 states have internal predecessors, (829), 0 states have call successors, (0), 0 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 11:48:58,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 504.0) internal successors, (2520), 5 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 11:48:58,268 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 504.0) internal successors, (2520), 5 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 11:48:58,268 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 412 flow. Second operand 4 states and 829 transitions. [2023-08-26 11:48:58,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 267 transitions, 1308 flow [2023-08-26 11:48:58,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 267 transitions, 1307 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:48:58,287 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 771 flow [2023-08-26 11:48:58,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=411, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=771, PETRI_PLACES=114, PETRI_TRANSITIONS=153} [2023-08-26 11:48:58,288 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -21 predicate places. [2023-08-26 11:48:58,288 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 771 flow [2023-08-26 11:48:58,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 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 11:48:58,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:48:58,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:48:58,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:48:58,289 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:48:58,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:48:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1928072151, now seen corresponding path program 1 times [2023-08-26 11:48:58,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:48:58,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202532950] [2023-08-26 11:48:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:48:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:48:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:48:58,313 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 11:48:58,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:48:58,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202532950] [2023-08-26 11:48:58,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202532950] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:48:58,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:48:58,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:48:58,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314629680] [2023-08-26 11:48:58,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:48:58,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:48:58,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:48:58,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:48:58,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:48:58,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 504 [2023-08-26 11:48:58,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 153 transitions, 771 flow. Second operand has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 11:48:58,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:48:58,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 504 [2023-08-26 11:48:58,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:49:02,075 INFO L124 PetriNetUnfolderBase]: 27192/46810 cut-off events. [2023-08-26 11:49:02,076 INFO L125 PetriNetUnfolderBase]: For 30150/30166 co-relation queries the response was YES. [2023-08-26 11:49:02,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123922 conditions, 46810 events. 27192/46810 cut-off events. For 30150/30166 co-relation queries the response was YES. Maximal size of possible extension queue 2683. Compared 446848 event pairs, 16228 based on Foata normal form. 500/29435 useless extension candidates. Maximal degree in co-relation 123901. Up to 38216 conditions per place. [2023-08-26 11:49:02,297 INFO L140 encePairwiseOnDemand]: 492/504 looper letters, 236 selfloop transitions, 12 changer transitions 0/266 dead transitions. [2023-08-26 11:49:02,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 266 transitions, 1819 flow [2023-08-26 11:49:02,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:49:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:49:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-08-26 11:49:02,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 11:49:02,319 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-08-26 11:49:02,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-08-26 11:49:02,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:49:02,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-08-26 11:49:02,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 0 states have call successors, (0), 0 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 11:49:02,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 11:49:02,323 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 504.0) internal successors, (3024), 6 states have internal predecessors, (3024), 0 states have call successors, (0), 0 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 11:49:02,323 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 771 flow. Second operand 5 states and 1050 transitions. [2023-08-26 11:49:02,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 266 transitions, 1819 flow [2023-08-26 11:49:02,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 266 transitions, 1810 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:49:02,363 INFO L231 Difference]: Finished difference. Result has 121 places, 164 transitions, 888 flow [2023-08-26 11:49:02,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=504, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=888, PETRI_PLACES=121, PETRI_TRANSITIONS=164} [2023-08-26 11:49:02,363 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -14 predicate places. [2023-08-26 11:49:02,364 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 164 transitions, 888 flow [2023-08-26 11:49:02,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 0 states have call successors, (0), 0 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 11:49:02,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:49:02,364 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 11:49:02,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:49:02,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:49:02,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:49:02,364 INFO L85 PathProgramCache]: Analyzing trace with hash -903108908, now seen corresponding path program 1 times [2023-08-26 11:49:02,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:49:02,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695350115] [2023-08-26 11:49:02,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:49:02,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:49:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:49:02,372 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:49:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:49:02,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:49:02,379 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:49:02,379 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (119 of 120 remaining) [2023-08-26 11:49:02,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 120 remaining) [2023-08-26 11:49:02,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 120 remaining) [2023-08-26 11:49:02,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 120 remaining) [2023-08-26 11:49:02,379 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 120 remaining) [2023-08-26 11:49:02,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (96 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (93 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (90 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 120 remaining) [2023-08-26 11:49:02,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 120 remaining) [2023-08-26 11:49:02,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (49 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 120 remaining) [2023-08-26 11:49:02,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 120 remaining) [2023-08-26 11:49:02,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (10 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 120 remaining) [2023-08-26 11:49:02,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 120 remaining) [2023-08-26 11:49:02,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 120 remaining) [2023-08-26 11:49:02,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 120 remaining) [2023-08-26 11:49:02,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 120 remaining) [2023-08-26 11:49:02,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:49:02,386 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:49:02,386 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:49:02,386 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 11:49:02,446 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:49:02,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 394 transitions, 809 flow [2023-08-26 11:49:02,504 INFO L124 PetriNetUnfolderBase]: 31/434 cut-off events. [2023-08-26 11:49:02,504 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:49:02,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 434 events. 31/434 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1612 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 368. Up to 8 conditions per place. [2023-08-26 11:49:02,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 373 places, 394 transitions, 809 flow [2023-08-26 11:49:02,515 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 394 transitions, 809 flow [2023-08-26 11:49:02,515 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:49:02,515 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 373 places, 394 transitions, 809 flow [2023-08-26 11:49:02,515 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 373 places, 394 transitions, 809 flow [2023-08-26 11:49:02,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 394 transitions, 809 flow [2023-08-26 11:49:02,564 INFO L124 PetriNetUnfolderBase]: 31/434 cut-off events. [2023-08-26 11:49:02,564 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:49:02,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 450 conditions, 434 events. 31/434 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1612 event pairs, 0 based on Foata normal form. 0/274 useless extension candidates. Maximal degree in co-relation 368. Up to 8 conditions per place. [2023-08-26 11:49:02,584 INFO L119 LiptonReduction]: Number of co-enabled transitions 94872 [2023-08-26 11:49:09,185 INFO L134 LiptonReduction]: Checked pairs total: 291122 [2023-08-26 11:49:09,186 INFO L136 LiptonReduction]: Total number of compositions: 327 [2023-08-26 11:49:09,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:49:09,201 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;@7961df95, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:49:09,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 159 error locations. [2023-08-26 11:49:09,202 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:49:09,202 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:49:09,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:49:09,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:49:09,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:49:09,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 156 more)] === [2023-08-26 11:49:09,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:49:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash 78569, now seen corresponding path program 1 times [2023-08-26 11:49:09,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:49:09,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14429358] [2023-08-26 11:49:09,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:49:09,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:49:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:49:09,227 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 11:49:09,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:49:09,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14429358] [2023-08-26 11:49:09,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14429358] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:49:09,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:49:09,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:49:09,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780334104] [2023-08-26 11:49:09,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:49:09,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:49:09,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:49:09,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:49:09,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:49:09,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 721 [2023-08-26 11:49:09,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 212 transitions, 445 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 11:49:09,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:49:09,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 721 [2023-08-26 11:49:09,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:06,012 INFO L124 PetriNetUnfolderBase]: 622729/868915 cut-off events. [2023-08-26 11:50:06,012 INFO L125 PetriNetUnfolderBase]: For 10711/10711 co-relation queries the response was YES. [2023-08-26 11:50:07,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1715170 conditions, 868915 events. 622729/868915 cut-off events. For 10711/10711 co-relation queries the response was YES. Maximal size of possible extension queue 32850. Compared 8110381 event pairs, 559402 based on Foata normal form. 24645/343642 useless extension candidates. Maximal degree in co-relation 682967. Up to 838873 conditions per place. [2023-08-26 11:50:10,891 INFO L140 encePairwiseOnDemand]: 676/721 looper letters, 138 selfloop transitions, 1 changer transitions 0/168 dead transitions. [2023-08-26 11:50:10,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 168 transitions, 635 flow [2023-08-26 11:50:10,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2023-08-26 11:50:10,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40360610263522884 [2023-08-26 11:50:10,893 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2023-08-26 11:50:10,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2023-08-26 11:50:10,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:10,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2023-08-26 11:50:10,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 0 states have call successors, (0), 0 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 11:50:10,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 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 11:50:10,897 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 721.0) internal successors, (2884), 4 states have internal predecessors, (2884), 0 states have call successors, (0), 0 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 11:50:10,897 INFO L175 Difference]: Start difference. First operand has 198 places, 212 transitions, 445 flow. Second operand 3 states and 873 transitions. [2023-08-26 11:50:10,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 168 transitions, 635 flow [2023-08-26 11:50:10,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 168 transitions, 629 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 11:50:10,905 INFO L231 Difference]: Finished difference. Result has 162 places, 168 transitions, 353 flow [2023-08-26 11:50:10,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=721, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=353, PETRI_PLACES=162, PETRI_TRANSITIONS=168} [2023-08-26 11:50:10,906 INFO L281 CegarLoopForPetriNet]: 198 programPoint places, -36 predicate places. [2023-08-26 11:50:10,906 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 168 transitions, 353 flow [2023-08-26 11:50:10,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 11:50:10,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:10,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:50:10,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:50:10,906 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 156 more)] === [2023-08-26 11:50:10,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:10,906 INFO L85 PathProgramCache]: Analyzing trace with hash 78567, now seen corresponding path program 1 times [2023-08-26 11:50:10,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:10,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163763685] [2023-08-26 11:50:10,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:10,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:10,921 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 11:50:10,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:10,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163763685] [2023-08-26 11:50:10,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163763685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:10,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:10,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:50:10,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744332864] [2023-08-26 11:50:10,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:10,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:50:10,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:50:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:50:10,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 721 [2023-08-26 11:50:10,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 168 transitions, 353 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 11:50:10,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:10,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 721 [2023-08-26 11:50:10,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand