/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_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:50:09,919 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:50:09,976 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 11:50:09,980 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:50:09,980 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:50:10,008 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:50:10,008 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:50:10,008 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:50:10,009 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:50:10,011 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:50:10,012 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:50:10,012 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:50:10,012 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:50:10,013 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:50:10,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:50:10,013 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:50:10,013 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:50:10,013 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:50:10,013 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:50:10,014 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:50:10,014 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:50:10,014 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:50:10,014 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:50:10,014 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:50:10,015 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:50:10,015 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:50:10,015 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:50:10,015 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:50:10,015 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:50:10,015 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:50:10,016 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:50:10,016 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:50:10,016 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:50:10,016 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:50:10,017 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:50:10,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:50:10,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:50:10,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:50:10,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:50:10,272 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:50:10,272 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:50:10,273 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-26 11:50:11,212 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:50:11,421 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:50:11,421 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/26_stack_cas_longest-2.i [2023-08-26 11:50:11,431 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c9b4ed4/7e71b952a2aa4666a48b3e81caedec1e/FLAGc8e0745db [2023-08-26 11:50:11,439 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3c9b4ed4/7e71b952a2aa4666a48b3e81caedec1e [2023-08-26 11:50:11,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:50:11,441 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:50:11,442 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:50:11,442 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:50:11,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:50:11,444 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,445 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c448d40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11, skipping insertion in model container [2023-08-26 11:50:11,445 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,471 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:50:11,730 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:50:11,741 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:50:11,765 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 11:50:11,767 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 11:50:11,793 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:50:11,824 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:50:11,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11 WrapperNode [2023-08-26 11:50:11,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:50:11,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:50:11,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:50:11,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:50:11,830 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,853 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,877 INFO L138 Inliner]: procedures = 177, calls = 48, calls flagged for inlining = 17, calls inlined = 20, statements flattened = 193 [2023-08-26 11:50:11,878 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:50:11,879 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:50:11,879 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:50:11,879 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:50:11,885 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,899 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,900 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,904 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,906 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,907 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,910 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:50:11,919 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:50:11,919 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:50:11,919 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:50:11,920 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (1/1) ... [2023-08-26 11:50:11,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:50:11,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:50:11,940 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 11:50:11,959 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 11:50:11,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:50:11,981 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:50:11,982 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:50:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:50:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:50:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:50:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:50:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:50:11,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:50:11,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:50:11,983 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 11:50:12,101 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:50:12,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:50:12,409 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:50:12,563 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:50:12,563 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 11:50:12,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:50:12 BoogieIcfgContainer [2023-08-26 11:50:12,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:50:12,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:50:12,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:50:12,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:50:12,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:50:11" (1/3) ... [2023-08-26 11:50:12,570 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101b2ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:50:12, skipping insertion in model container [2023-08-26 11:50:12,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:50:11" (2/3) ... [2023-08-26 11:50:12,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101b2ba3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:50:12, skipping insertion in model container [2023-08-26 11:50:12,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:50:12" (3/3) ... [2023-08-26 11:50:12,571 INFO L112 eAbstractionObserver]: Analyzing ICFG 26_stack_cas_longest-2.i [2023-08-26 11:50:12,582 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:50:12,583 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2023-08-26 11:50:12,583 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:50:12,689 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:50:12,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 11:50:12,777 INFO L124 PetriNetUnfolderBase]: 11/168 cut-off events. [2023-08-26 11:50:12,777 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:50:12,782 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 11:50:12,783 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 11:50:12,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 156 transitions, 317 flow [2023-08-26 11:50:12,792 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:50:12,801 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 156 transitions, 317 flow [2023-08-26 11:50:12,804 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 156 transitions, 317 flow [2023-08-26 11:50:12,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 156 transitions, 317 flow [2023-08-26 11:50:12,848 INFO L124 PetriNetUnfolderBase]: 11/168 cut-off events. [2023-08-26 11:50:12,848 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:50:12,852 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 11:50:12,854 INFO L119 LiptonReduction]: Number of co-enabled transitions 3540 [2023-08-26 11:50:18,462 INFO L134 LiptonReduction]: Checked pairs total: 5664 [2023-08-26 11:50:18,462 INFO L136 LiptonReduction]: Total number of compositions: 171 [2023-08-26 11:50:18,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:50:18,475 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;@6f96a17c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:50:18,475 INFO L358 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2023-08-26 11:50:18,476 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:50:18,476 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 11:50:18,476 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:50:18,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:18,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:50:18,477 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 11:50:18,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash 31782, now seen corresponding path program 1 times [2023-08-26 11:50:18,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:18,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238245141] [2023-08-26 11:50:18,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:18,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:18,664 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 11:50:18,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:18,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238245141] [2023-08-26 11:50:18,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238245141] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:18,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:18,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:50:18,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352671307] [2023-08-26 11:50:18,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:18,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:50:18,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:50:18,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:50:18,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 327 [2023-08-26 11:50:18,696 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 11:50:18,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:18,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 327 [2023-08-26 11:50:18,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:18,862 INFO L124 PetriNetUnfolderBase]: 246/539 cut-off events. [2023-08-26 11:50:18,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:50:18,862 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 11:50:18,867 INFO L140 encePairwiseOnDemand]: 303/327 looper letters, 78 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-26 11:50:18,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 83 transitions, 335 flow [2023-08-26 11:50:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:18,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-26 11:50:18,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38837920489296635 [2023-08-26 11:50:18,881 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-26 11:50:18,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-26 11:50:18,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:18,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-26 11:50:18,889 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 11:50:18,892 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 11:50:18,893 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 11:50:18,895 INFO L175 Difference]: Start difference. First operand has 64 places, 68 transitions, 141 flow. Second operand 3 states and 381 transitions. [2023-08-26 11:50:18,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 83 transitions, 335 flow [2023-08-26 11:50:18,897 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 11:50:18,899 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 133 flow [2023-08-26 11:50:18,901 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 11:50:18,903 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -13 predicate places. [2023-08-26 11:50:18,904 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 133 flow [2023-08-26 11:50:18,904 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 11:50:18,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:18,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:50:18,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:50:18,904 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 11:50:18,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash 31784, now seen corresponding path program 1 times [2023-08-26 11:50:18,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:18,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399916584] [2023-08-26 11:50:18,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:18,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:50:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:19,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399916584] [2023-08-26 11:50:19,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399916584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:19,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:19,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:50:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728070616] [2023-08-26 11:50:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:19,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:50:19,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:19,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:50:19,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:50:19,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 327 [2023-08-26 11:50:19,008 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 11:50:19,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:19,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 327 [2023-08-26 11:50:19,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:19,082 INFO L124 PetriNetUnfolderBase]: 172/402 cut-off events. [2023-08-26 11:50:19,082 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-08-26 11:50:19,082 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 11:50:19,083 INFO L140 encePairwiseOnDemand]: 325/327 looper letters, 48 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-26 11:50:19,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 51 transitions, 229 flow [2023-08-26 11:50:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 11:50:19,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292558613659531 [2023-08-26 11:50:19,085 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 11:50:19,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 11:50:19,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:19,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 11:50:19,086 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 11:50:19,087 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 11:50:19,088 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 11:50:19,088 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 133 flow. Second operand 3 states and 323 transitions. [2023-08-26 11:50:19,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 51 transitions, 229 flow [2023-08-26 11:50:19,089 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 11:50:19,090 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 125 flow [2023-08-26 11:50:19,090 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 11:50:19,091 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-08-26 11:50:19,091 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 125 flow [2023-08-26 11:50:19,091 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 11:50:19,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:19,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:50:19,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:50:19,092 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:50:19,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:19,092 INFO L85 PathProgramCache]: Analyzing trace with hash 30568877, now seen corresponding path program 1 times [2023-08-26 11:50:19,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:19,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368779551] [2023-08-26 11:50:19,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:19,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:19,166 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 11:50:19,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:19,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368779551] [2023-08-26 11:50:19,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368779551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:19,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:19,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:50:19,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686604303] [2023-08-26 11:50:19,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:19,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:50:19,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:19,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:50:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:50:19,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 327 [2023-08-26 11:50:19,169 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 11:50:19,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:19,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 327 [2023-08-26 11:50:19,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:19,285 INFO L124 PetriNetUnfolderBase]: 176/424 cut-off events. [2023-08-26 11:50:19,285 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-26 11:50:19,286 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 11:50:19,287 INFO L140 encePairwiseOnDemand]: 322/327 looper letters, 73 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-26 11:50:19,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 333 flow [2023-08-26 11:50:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-26 11:50:19,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34046890927624873 [2023-08-26 11:50:19,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-26 11:50:19,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-26 11:50:19,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:19,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-26 11:50:19,289 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 11:50:19,291 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 11:50:19,292 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 11:50:19,292 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 125 flow. Second operand 3 states and 334 transitions. [2023-08-26 11:50:19,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 333 flow [2023-08-26 11:50:19,293 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 11:50:19,294 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 141 flow [2023-08-26 11:50:19,295 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 11:50:19,295 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-08-26 11:50:19,296 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 141 flow [2023-08-26 11:50:19,296 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 11:50:19,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:19,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:50:19,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:50:19,296 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:50:19,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash 30569005, now seen corresponding path program 1 times [2023-08-26 11:50:19,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:19,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257849762] [2023-08-26 11:50:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:19,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:19,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:50:19,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:19,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257849762] [2023-08-26 11:50:19,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257849762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:19,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:19,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:50:19,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728495355] [2023-08-26 11:50:19,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:19,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:50:19,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:50:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:50:19,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 327 [2023-08-26 11:50:19,383 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 11:50:19,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:19,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 327 [2023-08-26 11:50:19,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:19,458 INFO L124 PetriNetUnfolderBase]: 161/405 cut-off events. [2023-08-26 11:50:19,459 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-26 11:50:19,459 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 11:50:19,461 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 45 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-26 11:50:19,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 48 transitions, 227 flow [2023-08-26 11:50:19,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-26 11:50:19,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32619775739041795 [2023-08-26 11:50:19,462 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-26 11:50:19,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-26 11:50:19,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:19,462 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-26 11:50:19,463 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 11:50:19,464 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 11:50:19,487 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 11:50:19,488 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 141 flow. Second operand 3 states and 320 transitions. [2023-08-26 11:50:19,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 48 transitions, 227 flow [2023-08-26 11:50:19,489 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 11:50:19,490 INFO L231 Difference]: Finished difference. Result has 48 places, 48 transitions, 134 flow [2023-08-26 11:50:19,490 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 11:50:19,492 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -16 predicate places. [2023-08-26 11:50:19,492 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 48 transitions, 134 flow [2023-08-26 11:50:19,492 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 11:50:19,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:19,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:50:19,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:50:19,493 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:50:19,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:19,493 INFO L85 PathProgramCache]: Analyzing trace with hash 30568878, now seen corresponding path program 1 times [2023-08-26 11:50:19,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:19,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755199325] [2023-08-26 11:50:19,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:19,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:19,620 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 11:50:19,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:19,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755199325] [2023-08-26 11:50:19,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755199325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:19,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:19,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:50:19,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352179516] [2023-08-26 11:50:19,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:19,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:50:19,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:19,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:50:19,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:50:19,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 327 [2023-08-26 11:50:19,624 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 11:50:19,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:19,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 327 [2023-08-26 11:50:19,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:19,703 INFO L124 PetriNetUnfolderBase]: 157/394 cut-off events. [2023-08-26 11:50:19,703 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 11:50:19,704 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 11:50:19,706 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 43 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-26 11:50:19,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 218 flow [2023-08-26 11:50:19,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:19,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 323 transitions. [2023-08-26 11:50:19,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3292558613659531 [2023-08-26 11:50:19,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 323 transitions. [2023-08-26 11:50:19,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 323 transitions. [2023-08-26 11:50:19,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:19,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 323 transitions. [2023-08-26 11:50:19,713 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 11:50:19,714 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 11:50:19,714 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 11:50:19,714 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 134 flow. Second operand 3 states and 323 transitions. [2023-08-26 11:50:19,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 218 flow [2023-08-26 11:50:19,716 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 11:50:19,717 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 131 flow [2023-08-26 11:50:19,717 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 11:50:19,719 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -17 predicate places. [2023-08-26 11:50:19,719 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 131 flow [2023-08-26 11:50:19,719 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 11:50:19,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:19,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:50:19,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:50:19,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:50:19,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:19,720 INFO L85 PathProgramCache]: Analyzing trace with hash 947636045, now seen corresponding path program 1 times [2023-08-26 11:50:19,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:19,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474064582] [2023-08-26 11:50:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:19,776 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 11:50:19,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:19,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474064582] [2023-08-26 11:50:19,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474064582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:19,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:19,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:50:19,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999494144] [2023-08-26 11:50:19,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:19,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:50:19,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:50:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:50:19,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 327 [2023-08-26 11:50:19,781 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 11:50:19,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:19,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 327 [2023-08-26 11:50:19,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:19,900 INFO L124 PetriNetUnfolderBase]: 161/374 cut-off events. [2023-08-26 11:50:19,900 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-26 11:50:19,901 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 11:50:19,902 INFO L140 encePairwiseOnDemand]: 318/327 looper letters, 63 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2023-08-26 11:50:19,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 329 flow [2023-08-26 11:50:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:50:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:50:19,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 410 transitions. [2023-08-26 11:50:19,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31345565749235477 [2023-08-26 11:50:19,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 410 transitions. [2023-08-26 11:50:19,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 410 transitions. [2023-08-26 11:50:19,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:19,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 410 transitions. [2023-08-26 11:50:19,905 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 11:50:19,907 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 11:50:19,908 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 11:50:19,908 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 131 flow. Second operand 4 states and 410 transitions. [2023-08-26 11:50:19,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 329 flow [2023-08-26 11:50:19,909 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 11:50:19,911 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 170 flow [2023-08-26 11:50:19,911 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 11:50:19,912 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, -14 predicate places. [2023-08-26 11:50:19,912 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 170 flow [2023-08-26 11:50:19,913 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 11:50:19,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:19,913 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 11:50:19,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:50:19,913 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 11:50:19,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash -687988900, now seen corresponding path program 1 times [2023-08-26 11:50:19,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:19,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419453821] [2023-08-26 11:50:19,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:19,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:50:19,921 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:50:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:50:19,936 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:50:19,936 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:50:19,937 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (80 of 81 remaining) [2023-08-26 11:50:19,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 81 remaining) [2023-08-26 11:50:19,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 81 remaining) [2023-08-26 11:50:19,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 81 remaining) [2023-08-26 11:50:19,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 81 remaining) [2023-08-26 11:50:19,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 81 remaining) [2023-08-26 11:50:19,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 81 remaining) [2023-08-26 11:50:19,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 81 remaining) [2023-08-26 11:50:19,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 81 remaining) [2023-08-26 11:50:19,939 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 81 remaining) [2023-08-26 11:50:19,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 81 remaining) [2023-08-26 11:50:19,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 81 remaining) [2023-08-26 11:50:19,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 81 remaining) [2023-08-26 11:50:19,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 81 remaining) [2023-08-26 11:50:19,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 81 remaining) [2023-08-26 11:50:19,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (57 of 81 remaining) [2023-08-26 11:50:19,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 81 remaining) [2023-08-26 11:50:19,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (54 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (51 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 81 remaining) [2023-08-26 11:50:19,941 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 81 remaining) [2023-08-26 11:50:19,942 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 81 remaining) [2023-08-26 11:50:19,943 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 81 remaining) [2023-08-26 11:50:19,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (10 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 81 remaining) [2023-08-26 11:50:19,945 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 81 remaining) [2023-08-26 11:50:19,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 81 remaining) [2023-08-26 11:50:19,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 81 remaining) [2023-08-26 11:50:19,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 81 remaining) [2023-08-26 11:50:19,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 81 remaining) [2023-08-26 11:50:19,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 81 remaining) [2023-08-26 11:50:19,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 81 remaining) [2023-08-26 11:50:19,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 81 remaining) [2023-08-26 11:50:19,946 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 81 remaining) [2023-08-26 11:50:19,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:50:19,947 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:50:19,948 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:50:19,948 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 11:50:19,999 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:50:20,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 275 transitions, 562 flow [2023-08-26 11:50:20,030 INFO L124 PetriNetUnfolderBase]: 21/301 cut-off events. [2023-08-26 11:50:20,030 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:50:20,033 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 11:50:20,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 261 places, 275 transitions, 562 flow [2023-08-26 11:50:20,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 261 places, 275 transitions, 562 flow [2023-08-26 11:50:20,037 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:50:20,037 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 261 places, 275 transitions, 562 flow [2023-08-26 11:50:20,037 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 261 places, 275 transitions, 562 flow [2023-08-26 11:50:20,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 261 places, 275 transitions, 562 flow [2023-08-26 11:50:20,066 INFO L124 PetriNetUnfolderBase]: 21/301 cut-off events. [2023-08-26 11:50:20,066 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:50:20,069 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 11:50:20,080 INFO L119 LiptonReduction]: Number of co-enabled transitions 35164 [2023-08-26 11:50:25,449 INFO L134 LiptonReduction]: Checked pairs total: 103486 [2023-08-26 11:50:25,449 INFO L136 LiptonReduction]: Total number of compositions: 229 [2023-08-26 11:50:25,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:50:25,451 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;@6f96a17c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:50:25,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 120 error locations. [2023-08-26 11:50:25,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:50:25,452 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:50:25,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:50:25,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:25,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:50:25,452 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 11:50:25,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:25,453 INFO L85 PathProgramCache]: Analyzing trace with hash 51719, now seen corresponding path program 1 times [2023-08-26 11:50:25,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:25,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571120900] [2023-08-26 11:50:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:25,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:25,465 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 11:50:25,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:25,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571120900] [2023-08-26 11:50:25,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571120900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:25,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:50:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281713760] [2023-08-26 11:50:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:25,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:50:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:50:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:50:25,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 504 [2023-08-26 11:50:25,467 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 11:50:25,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:25,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 504 [2023-08-26 11:50:25,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:27,918 INFO L124 PetriNetUnfolderBase]: 21706/35516 cut-off events. [2023-08-26 11:50:27,918 INFO L125 PetriNetUnfolderBase]: For 433/433 co-relation queries the response was YES. [2023-08-26 11:50:27,938 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 11:50:28,063 INFO L140 encePairwiseOnDemand]: 468/504 looper letters, 183 selfloop transitions, 6 changer transitions 0/208 dead transitions. [2023-08-26 11:50:28,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 208 transitions, 811 flow [2023-08-26 11:50:28,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 710 transitions. [2023-08-26 11:50:28,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695767195767196 [2023-08-26 11:50:28,066 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 710 transitions. [2023-08-26 11:50:28,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 710 transitions. [2023-08-26 11:50:28,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:28,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 710 transitions. [2023-08-26 11:50:28,067 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 11:50:28,069 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 11:50:28,069 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 11:50:28,069 INFO L175 Difference]: Start difference. First operand has 135 places, 144 transitions, 300 flow. Second operand 3 states and 710 transitions. [2023-08-26 11:50:28,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 208 transitions, 811 flow [2023-08-26 11:50:28,072 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 11:50:28,075 INFO L231 Difference]: Finished difference. Result has 114 places, 120 transitions, 286 flow [2023-08-26 11:50:28,075 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 11:50:28,076 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -21 predicate places. [2023-08-26 11:50:28,076 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 120 transitions, 286 flow [2023-08-26 11:50:28,076 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 11:50:28,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:28,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:50:28,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:50:28,077 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 11:50:28,077 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:28,077 INFO L85 PathProgramCache]: Analyzing trace with hash 51717, now seen corresponding path program 1 times [2023-08-26 11:50:28,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:28,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048474234] [2023-08-26 11:50:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:28,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:28,111 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 11:50:28,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:28,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048474234] [2023-08-26 11:50:28,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048474234] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:28,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:28,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:50:28,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275034954] [2023-08-26 11:50:28,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:28,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:50:28,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:28,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:50:28,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:50:28,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 504 [2023-08-26 11:50:28,113 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 11:50:28,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:28,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 504 [2023-08-26 11:50:28,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:29,762 INFO L124 PetriNetUnfolderBase]: 14642/24293 cut-off events. [2023-08-26 11:50:29,762 INFO L125 PetriNetUnfolderBase]: For 9060/9060 co-relation queries the response was YES. [2023-08-26 11:50:29,778 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 11:50:29,869 INFO L140 encePairwiseOnDemand]: 502/504 looper letters, 99 selfloop transitions, 1 changer transitions 0/119 dead transitions. [2023-08-26 11:50:29,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 119 transitions, 484 flow [2023-08-26 11:50:29,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:29,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2023-08-26 11:50:29,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38293650793650796 [2023-08-26 11:50:29,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2023-08-26 11:50:29,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2023-08-26 11:50:29,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:29,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2023-08-26 11:50:29,872 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 11:50:29,874 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 11:50:29,875 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 11:50:29,876 INFO L175 Difference]: Start difference. First operand has 114 places, 120 transitions, 286 flow. Second operand 3 states and 579 transitions. [2023-08-26 11:50:29,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 119 transitions, 484 flow [2023-08-26 11:50:29,904 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 11:50:29,905 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 274 flow [2023-08-26 11:50:29,905 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 11:50:29,906 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -22 predicate places. [2023-08-26 11:50:29,906 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 274 flow [2023-08-26 11:50:29,907 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 11:50:29,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:29,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:50:29,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:50:29,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:50:29,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash 49744532, now seen corresponding path program 1 times [2023-08-26 11:50:29,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:29,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3383045] [2023-08-26 11:50:29,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:29,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:29,988 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 11:50:29,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:29,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3383045] [2023-08-26 11:50:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3383045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:29,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:29,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:50:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943797005] [2023-08-26 11:50:29,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:29,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:50:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:29,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:50:29,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:50:29,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 504 [2023-08-26 11:50:29,994 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 11:50:29,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:29,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 504 [2023-08-26 11:50:29,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:31,538 INFO L124 PetriNetUnfolderBase]: 13478/22320 cut-off events. [2023-08-26 11:50:31,539 INFO L125 PetriNetUnfolderBase]: For 3470/3470 co-relation queries the response was YES. [2023-08-26 11:50:31,552 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 11:50:31,621 INFO L140 encePairwiseOnDemand]: 499/504 looper letters, 95 selfloop transitions, 1 changer transitions 0/115 dead transitions. [2023-08-26 11:50:31,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 115 transitions, 458 flow [2023-08-26 11:50:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:31,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 584 transitions. [2023-08-26 11:50:31,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2023-08-26 11:50:31,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 584 transitions. [2023-08-26 11:50:31,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 584 transitions. [2023-08-26 11:50:31,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:31,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 584 transitions. [2023-08-26 11:50:31,624 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 11:50:31,626 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 11:50:31,626 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 11:50:31,626 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 274 flow. Second operand 3 states and 584 transitions. [2023-08-26 11:50:31,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 115 transitions, 458 flow [2023-08-26 11:50:31,628 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 11:50:31,629 INFO L231 Difference]: Finished difference. Result has 110 places, 115 transitions, 267 flow [2023-08-26 11:50:31,629 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 11:50:31,630 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -25 predicate places. [2023-08-26 11:50:31,630 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 115 transitions, 267 flow [2023-08-26 11:50:31,630 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 11:50:31,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:31,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:50:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:50:31,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:50:31,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:31,631 INFO L85 PathProgramCache]: Analyzing trace with hash 49744531, now seen corresponding path program 1 times [2023-08-26 11:50:31,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:31,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794386427] [2023-08-26 11:50:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:31,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:31,685 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 11:50:31,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794386427] [2023-08-26 11:50:31,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794386427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:31,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:31,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:50:31,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057515138] [2023-08-26 11:50:31,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:50:31,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:31,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:50:31,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:50:31,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 504 [2023-08-26 11:50:31,688 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 11:50:31,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:31,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 504 [2023-08-26 11:50:31,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:34,719 INFO L124 PetriNetUnfolderBase]: 25620/43514 cut-off events. [2023-08-26 11:50:34,720 INFO L125 PetriNetUnfolderBase]: For 6072/6072 co-relation queries the response was YES. [2023-08-26 11:50:34,755 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 11:50:34,873 INFO L140 encePairwiseOnDemand]: 491/504 looper letters, 242 selfloop transitions, 17 changer transitions 0/278 dead transitions. [2023-08-26 11:50:34,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 278 transitions, 1148 flow [2023-08-26 11:50:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:50:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:50:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 863 transitions. [2023-08-26 11:50:34,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280753968253968 [2023-08-26 11:50:34,876 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 863 transitions. [2023-08-26 11:50:34,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 863 transitions. [2023-08-26 11:50:34,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:34,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 863 transitions. [2023-08-26 11:50:34,878 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 11:50:34,880 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 11:50:34,880 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 11:50:34,880 INFO L175 Difference]: Start difference. First operand has 110 places, 115 transitions, 267 flow. Second operand 4 states and 863 transitions. [2023-08-26 11:50:34,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 278 transitions, 1148 flow [2023-08-26 11:50:34,882 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 11:50:34,884 INFO L231 Difference]: Finished difference. Result has 115 places, 131 transitions, 426 flow [2023-08-26 11:50:34,885 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 11:50:34,885 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -20 predicate places. [2023-08-26 11:50:34,886 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 131 transitions, 426 flow [2023-08-26 11:50:34,886 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 11:50:34,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:34,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:50:34,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:50:34,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:50:34,886 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:34,886 INFO L85 PathProgramCache]: Analyzing trace with hash 559893078, now seen corresponding path program 1 times [2023-08-26 11:50:34,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:34,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778111570] [2023-08-26 11:50:34,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:34,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:34,939 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 11:50:34,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:34,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778111570] [2023-08-26 11:50:34,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778111570] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:34,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:34,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:50:34,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819994866] [2023-08-26 11:50:34,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:34,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:50:34,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:50:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:50:34,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 504 [2023-08-26 11:50:34,941 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 11:50:34,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:34,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 504 [2023-08-26 11:50:34,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:37,422 INFO L124 PetriNetUnfolderBase]: 21480/36206 cut-off events. [2023-08-26 11:50:37,422 INFO L125 PetriNetUnfolderBase]: For 12109/12109 co-relation queries the response was YES. [2023-08-26 11:50:37,461 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 11:50:37,564 INFO L140 encePairwiseOnDemand]: 495/504 looper letters, 104 selfloop transitions, 1 changer transitions 0/123 dead transitions. [2023-08-26 11:50:37,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 123 transitions, 620 flow [2023-08-26 11:50:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:50:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:50:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-08-26 11:50:37,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37632275132275134 [2023-08-26 11:50:37,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-08-26 11:50:37,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-08-26 11:50:37,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:37,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-08-26 11:50:37,567 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 11:50:37,569 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 11:50:37,569 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 11:50:37,569 INFO L175 Difference]: Start difference. First operand has 115 places, 131 transitions, 426 flow. Second operand 3 states and 569 transitions. [2023-08-26 11:50:37,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 123 transitions, 620 flow [2023-08-26 11:50:37,586 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 11:50:37,587 INFO L231 Difference]: Finished difference. Result has 109 places, 123 transitions, 412 flow [2023-08-26 11:50:37,587 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 11:50:37,588 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -26 predicate places. [2023-08-26 11:50:37,588 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 123 transitions, 412 flow [2023-08-26 11:50:37,588 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 11:50:37,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:37,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:50:37,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:50:37,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:50:37,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash 559893077, now seen corresponding path program 1 times [2023-08-26 11:50:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107160545] [2023-08-26 11:50:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:37,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:50:37,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:37,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107160545] [2023-08-26 11:50:37,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107160545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:37,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:37,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:50:37,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265986197] [2023-08-26 11:50:37,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:37,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:50:37,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:50:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:50:37,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 504 [2023-08-26 11:50:37,625 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 11:50:37,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:37,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 504 [2023-08-26 11:50:37,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:41,346 INFO L124 PetriNetUnfolderBase]: 25712/43929 cut-off events. [2023-08-26 11:50:41,346 INFO L125 PetriNetUnfolderBase]: For 14745/14745 co-relation queries the response was YES. [2023-08-26 11:50:41,392 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 11:50:41,510 INFO L140 encePairwiseOnDemand]: 473/504 looper letters, 210 selfloop transitions, 39 changer transitions 0/267 dead transitions. [2023-08-26 11:50:41,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 267 transitions, 1308 flow [2023-08-26 11:50:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:50:41,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:50:41,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 829 transitions. [2023-08-26 11:50:41,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41121031746031744 [2023-08-26 11:50:41,512 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 829 transitions. [2023-08-26 11:50:41,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 829 transitions. [2023-08-26 11:50:41,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:41,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 829 transitions. [2023-08-26 11:50:41,514 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 11:50:41,516 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 11:50:41,517 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 11:50:41,517 INFO L175 Difference]: Start difference. First operand has 109 places, 123 transitions, 412 flow. Second operand 4 states and 829 transitions. [2023-08-26 11:50:41,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 267 transitions, 1308 flow [2023-08-26 11:50:41,532 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 11:50:41,534 INFO L231 Difference]: Finished difference. Result has 114 places, 153 transitions, 771 flow [2023-08-26 11:50:41,534 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 11:50:41,534 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -21 predicate places. [2023-08-26 11:50:41,534 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 153 transitions, 771 flow [2023-08-26 11:50:41,535 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 11:50:41,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:41,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:50:41,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:50:41,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 117 more)] === [2023-08-26 11:50:41,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1928072151, now seen corresponding path program 1 times [2023-08-26 11:50:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:41,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567839541] [2023-08-26 11:50:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:41,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:41,559 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 11:50:41,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567839541] [2023-08-26 11:50:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567839541] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:41,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:41,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:50:41,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541344157] [2023-08-26 11:50:41,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:41,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:50:41,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:41,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:50:41,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:50:41,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 504 [2023-08-26 11:50:41,561 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 11:50:41,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:41,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 504 [2023-08-26 11:50:41,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:50:45,558 INFO L124 PetriNetUnfolderBase]: 27192/46810 cut-off events. [2023-08-26 11:50:45,558 INFO L125 PetriNetUnfolderBase]: For 30150/30166 co-relation queries the response was YES. [2023-08-26 11:50:45,619 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 11:50:45,753 INFO L140 encePairwiseOnDemand]: 492/504 looper letters, 236 selfloop transitions, 12 changer transitions 0/266 dead transitions. [2023-08-26 11:50:45,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 266 transitions, 1819 flow [2023-08-26 11:50:45,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:50:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:50:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1050 transitions. [2023-08-26 11:50:45,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 11:50:45,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1050 transitions. [2023-08-26 11:50:45,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1050 transitions. [2023-08-26 11:50:45,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:50:45,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1050 transitions. [2023-08-26 11:50:45,757 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 11:50:45,760 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 11:50:45,760 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 11:50:45,760 INFO L175 Difference]: Start difference. First operand has 114 places, 153 transitions, 771 flow. Second operand 5 states and 1050 transitions. [2023-08-26 11:50:45,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 266 transitions, 1819 flow [2023-08-26 11:50:45,780 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 11:50:45,782 INFO L231 Difference]: Finished difference. Result has 121 places, 164 transitions, 888 flow [2023-08-26 11:50:45,782 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 11:50:45,783 INFO L281 CegarLoopForPetriNet]: 135 programPoint places, -14 predicate places. [2023-08-26 11:50:45,783 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 164 transitions, 888 flow [2023-08-26 11:50:45,783 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 11:50:45,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:45,783 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 11:50:45,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:50:45,783 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 11:50:45,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash -903108908, now seen corresponding path program 1 times [2023-08-26 11:50:45,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:45,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575887470] [2023-08-26 11:50:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:45,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:50:45,792 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:50:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:50:45,799 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:50:45,799 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:50:45,799 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (119 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (110 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 120 remaining) [2023-08-26 11:50:45,800 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (96 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (93 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (90 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 120 remaining) [2023-08-26 11:50:45,801 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 120 remaining) [2023-08-26 11:50:45,802 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 120 remaining) [2023-08-26 11:50:45,803 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (55 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (52 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (49 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 120 remaining) [2023-08-26 11:50:45,804 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 120 remaining) [2023-08-26 11:50:45,805 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22ASSERT_VIOLATIONARRAY_INDEX (16 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (13 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err38ASSERT_VIOLATIONASSERT (10 of 120 remaining) [2023-08-26 11:50:45,806 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err32REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 120 remaining) [2023-08-26 11:50:45,807 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 120 remaining) [2023-08-26 11:50:45,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:50:45,807 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:50:45,808 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:50:45,808 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 11:50:45,859 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:50:45,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 394 transitions, 809 flow [2023-08-26 11:50:45,905 INFO L124 PetriNetUnfolderBase]: 31/434 cut-off events. [2023-08-26 11:50:45,905 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:50:45,909 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 11:50:45,909 INFO L82 GeneralOperation]: Start removeDead. Operand has 373 places, 394 transitions, 809 flow [2023-08-26 11:50:45,914 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 373 places, 394 transitions, 809 flow [2023-08-26 11:50:45,915 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:50:45,915 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 373 places, 394 transitions, 809 flow [2023-08-26 11:50:45,915 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 373 places, 394 transitions, 809 flow [2023-08-26 11:50:45,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 373 places, 394 transitions, 809 flow [2023-08-26 11:50:45,958 INFO L124 PetriNetUnfolderBase]: 31/434 cut-off events. [2023-08-26 11:50:45,959 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:50:45,962 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 11:50:45,979 INFO L119 LiptonReduction]: Number of co-enabled transitions 94872 [2023-08-26 11:50:53,601 INFO L134 LiptonReduction]: Checked pairs total: 291122 [2023-08-26 11:50:53,601 INFO L136 LiptonReduction]: Total number of compositions: 327 [2023-08-26 11:50:53,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:50:53,602 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;@6f96a17c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:50:53,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 159 error locations. [2023-08-26 11:50:53,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:50:53,603 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:50:53,603 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:50:53,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:50:53,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:50:53,603 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 11:50:53,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:50:53,603 INFO L85 PathProgramCache]: Analyzing trace with hash 78569, now seen corresponding path program 1 times [2023-08-26 11:50:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:50:53,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298309117] [2023-08-26 11:50:53,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:50:53,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:50:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:50:53,624 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 11:50:53,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:50:53,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298309117] [2023-08-26 11:50:53,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298309117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:50:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:50:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:50:53,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738480182] [2023-08-26 11:50:53,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:50:53,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:50:53,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:50:53,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:50:53,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:50:53,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 721 [2023-08-26 11:50:53,626 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 11:50:53,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:50:53,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 721 [2023-08-26 11:50:53,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:51:49,997 INFO L124 PetriNetUnfolderBase]: 622729/868915 cut-off events. [2023-08-26 11:51:49,997 INFO L125 PetriNetUnfolderBase]: For 10711/10711 co-relation queries the response was YES. [2023-08-26 11:51:50,975 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 11:51:54,441 INFO L140 encePairwiseOnDemand]: 676/721 looper letters, 138 selfloop transitions, 1 changer transitions 0/168 dead transitions. [2023-08-26 11:51:54,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 168 transitions, 635 flow [2023-08-26 11:51:54,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:51:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:51:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 873 transitions. [2023-08-26 11:51:54,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40360610263522884 [2023-08-26 11:51:54,444 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 873 transitions. [2023-08-26 11:51:54,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 873 transitions. [2023-08-26 11:51:54,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:51:54,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 873 transitions. [2023-08-26 11:51:54,445 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 11:51:54,447 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 11:51:54,448 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 11:51:54,448 INFO L175 Difference]: Start difference. First operand has 198 places, 212 transitions, 445 flow. Second operand 3 states and 873 transitions. [2023-08-26 11:51:54,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 168 transitions, 635 flow [2023-08-26 11:51:54,453 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 11:51:54,454 INFO L231 Difference]: Finished difference. Result has 162 places, 168 transitions, 353 flow [2023-08-26 11:51:54,454 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 11:51:54,455 INFO L281 CegarLoopForPetriNet]: 198 programPoint places, -36 predicate places. [2023-08-26 11:51:54,455 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 168 transitions, 353 flow [2023-08-26 11:51:54,455 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 11:51:54,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:51:54,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 11:51:54,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:51:54,455 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 11:51:54,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:51:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash 78567, now seen corresponding path program 1 times [2023-08-26 11:51:54,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:51:54,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482376208] [2023-08-26 11:51:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:51:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:51:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:51:54,467 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 11:51:54,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:51:54,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482376208] [2023-08-26 11:51:54,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482376208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:51:54,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:51:54,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:51:54,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473302329] [2023-08-26 11:51:54,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:51:54,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:51:54,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:51:54,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:51:54,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:51:54,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 721 [2023-08-26 11:51:54,469 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 11:51:54,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:51:54,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 721 [2023-08-26 11:51:54,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand