/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/goblint-regression/28-race_reach_19-callback_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:35:55,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:35:55,290 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 12:35:55,293 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:35:55,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:35:55,313 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:35:55,314 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:35:55,318 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:35:55,318 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:35:55,325 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:35:55,325 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:35:55,325 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:35:55,325 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:35:55,326 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:35:55,326 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:35:55,326 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:35:55,326 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:35:55,327 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:35:55,327 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:35:55,327 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:35:55,327 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:35:55,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:35:55,328 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:35:55,328 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:35:55,328 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:35:55,328 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:35:55,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:35:55,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:35:55,329 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:35:55,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:35:55,330 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:35:55,330 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:35:55,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:35:55,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:35:55,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:35:55,331 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:35:55,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:35:55,580 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:35:55,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:35:55,583 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:35:55,583 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:35:55,584 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-26 12:35:56,549 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:35:56,779 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:35:56,779 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_19-callback_racing.i [2023-08-26 12:35:56,792 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3369c2ac6/cdbd95df2f4c4272b16c7c89b660507b/FLAGcbec9263d [2023-08-26 12:35:56,801 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3369c2ac6/cdbd95df2f4c4272b16c7c89b660507b [2023-08-26 12:35:56,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:35:56,803 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:35:56,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:35:56,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:35:56,806 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:35:56,806 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:35:56" (1/1) ... [2023-08-26 12:35:56,807 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fdce0c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:56, skipping insertion in model container [2023-08-26 12:35:56,807 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:35:56" (1/1) ... [2023-08-26 12:35:56,836 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:35:57,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:35:57,101 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:35:57,124 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 12:35:57,125 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 12:35:57,141 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:35:57,163 WARN L669 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 12:35:57,168 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:35:57,169 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57 WrapperNode [2023-08-26 12:35:57,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:35:57,170 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:35:57,171 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:35:57,171 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:35:57,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,202 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,226 INFO L138 Inliner]: procedures = 173, calls = 40, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 140 [2023-08-26 12:35:57,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:35:57,227 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:35:57,228 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:35:57,228 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:35:57,233 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,234 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,246 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,247 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,250 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,253 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,254 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,273 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:35:57,273 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:35:57,273 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:35:57,273 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:35:57,274 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (1/1) ... [2023-08-26 12:35:57,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:35:57,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:35:57,299 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 12:35:57,310 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 12:35:57,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:35:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:35:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:35:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:35:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:35:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:35:57,329 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:35:57,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:35:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:35:57,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:35:57,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:35:57,331 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 12:35:57,456 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:35:57,460 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:35:57,670 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:35:57,675 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:35:57,676 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-26 12:35:57,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:35:57 BoogieIcfgContainer [2023-08-26 12:35:57,677 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:35:57,678 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:35:57,678 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:35:57,680 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:35:57,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:35:56" (1/3) ... [2023-08-26 12:35:57,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6956b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:35:57, skipping insertion in model container [2023-08-26 12:35:57,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:57" (2/3) ... [2023-08-26 12:35:57,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e6956b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:35:57, skipping insertion in model container [2023-08-26 12:35:57,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:35:57" (3/3) ... [2023-08-26 12:35:57,682 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_19-callback_racing.i [2023-08-26 12:35:57,703 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:35:57,703 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 12:35:57,703 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:35:57,749 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:35:57,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 146 transitions, 300 flow [2023-08-26 12:35:57,842 INFO L124 PetriNetUnfolderBase]: 27/223 cut-off events. [2023-08-26 12:35:57,842 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:35:57,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 223 events. 27/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 631 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2023-08-26 12:35:57,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 146 transitions, 300 flow [2023-08-26 12:35:57,856 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 146 transitions, 300 flow [2023-08-26 12:35:57,858 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:35:57,866 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 146 transitions, 300 flow [2023-08-26 12:35:57,868 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 146 transitions, 300 flow [2023-08-26 12:35:57,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 146 transitions, 300 flow [2023-08-26 12:35:57,902 INFO L124 PetriNetUnfolderBase]: 27/223 cut-off events. [2023-08-26 12:35:57,902 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:35:57,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229 conditions, 223 events. 27/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 631 event pairs, 0 based on Foata normal form. 0/184 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2023-08-26 12:35:57,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 3984 [2023-08-26 12:36:00,823 INFO L134 LiptonReduction]: Checked pairs total: 5510 [2023-08-26 12:36:00,823 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-26 12:36:00,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:36:00,849 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;@1fb72758, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:36:00,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 12:36:00,851 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:36:00,852 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:36:00,852 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:36:00,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:00,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:00,853 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 12:36:00,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:00,856 INFO L85 PathProgramCache]: Analyzing trace with hash 17641, now seen corresponding path program 1 times [2023-08-26 12:36:00,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:00,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847419134] [2023-08-26 12:36:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:00,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:01,055 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 12:36:01,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:01,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847419134] [2023-08-26 12:36:01,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847419134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:01,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:01,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:01,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777152559] [2023-08-26 12:36:01,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:01,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:01,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:01,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:01,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:01,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 279 [2023-08-26 12:36:01,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 12:36:01,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:01,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 279 [2023-08-26 12:36:01,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:01,167 INFO L124 PetriNetUnfolderBase]: 90/212 cut-off events. [2023-08-26 12:36:01,168 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:36:01,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 424 conditions, 212 events. 90/212 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 925 event pairs, 70 based on Foata normal form. 23/176 useless extension candidates. Maximal degree in co-relation 369. Up to 190 conditions per place. [2023-08-26 12:36:01,173 INFO L140 encePairwiseOnDemand]: 267/279 looper letters, 26 selfloop transitions, 2 changer transitions 3/34 dead transitions. [2023-08-26 12:36:01,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 34 transitions, 138 flow [2023-08-26 12:36:01,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:01,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-26 12:36:01,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45997610513739545 [2023-08-26 12:36:01,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-26 12:36:01,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-26 12:36:01,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:01,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-26 12:36:01,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 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 12:36:01,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 12:36:01,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 12:36:01,203 INFO L175 Difference]: Start difference. First operand has 31 places, 39 transitions, 86 flow. Second operand 3 states and 385 transitions. [2023-08-26 12:36:01,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 34 transitions, 138 flow [2023-08-26 12:36:01,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:36:01,206 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 70 flow [2023-08-26 12:36:01,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-26 12:36:01,209 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 0 predicate places. [2023-08-26 12:36:01,209 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 70 flow [2023-08-26 12:36:01,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 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 12:36:01,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:01,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:01,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:36:01,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 12:36:01,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash 17642, now seen corresponding path program 1 times [2023-08-26 12:36:01,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:01,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685088809] [2023-08-26 12:36:01,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:01,289 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 12:36:01,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:01,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685088809] [2023-08-26 12:36:01,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685088809] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:01,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:01,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:01,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717743599] [2023-08-26 12:36:01,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:01,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:01,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:01,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:01,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:01,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 279 [2023-08-26 12:36:01,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 12:36:01,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:01,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 279 [2023-08-26 12:36:01,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:01,360 INFO L124 PetriNetUnfolderBase]: 87/197 cut-off events. [2023-08-26 12:36:01,360 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 12:36:01,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 197 events. 87/197 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 756 event pairs, 56 based on Foata normal form. 0/150 useless extension candidates. Maximal degree in co-relation 375. Up to 183 conditions per place. [2023-08-26 12:36:01,361 INFO L140 encePairwiseOnDemand]: 275/279 looper letters, 30 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-26 12:36:01,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 146 flow [2023-08-26 12:36:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:01,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:01,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-26 12:36:01,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43130227001194743 [2023-08-26 12:36:01,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-26 12:36:01,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-26 12:36:01,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:01,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-26 12:36:01,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 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 12:36:01,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 12:36:01,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 12:36:01,366 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 70 flow. Second operand 3 states and 361 transitions. [2023-08-26 12:36:01,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 146 flow [2023-08-26 12:36:01,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:36:01,367 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 76 flow [2023-08-26 12:36:01,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-26 12:36:01,367 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-26 12:36:01,367 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 76 flow [2023-08-26 12:36:01,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 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 12:36:01,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:01,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:36:01,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:36:01,368 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 12:36:01,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash 525902293, now seen corresponding path program 1 times [2023-08-26 12:36:01,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:01,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028854404] [2023-08-26 12:36:01,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:01,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:01,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:01,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028854404] [2023-08-26 12:36:01,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028854404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:36:01,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982081757] [2023-08-26 12:36:01,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:01,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:01,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:36:01,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:36:01,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 12:36:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:01,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:36:01,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:36:01,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:36:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:01,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:36:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:01,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982081757] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:36:01,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:36:01,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:36:01,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147035791] [2023-08-26 12:36:01,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:36:01,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:36:01,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:01,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:36:01,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:36:01,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 279 [2023-08-26 12:36:01,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 76 flow. Second operand has 8 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 0 states have call successors, (0), 0 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 12:36:01,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:01,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 279 [2023-08-26 12:36:01,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:01,735 INFO L124 PetriNetUnfolderBase]: 10/37 cut-off events. [2023-08-26 12:36:01,735 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 12:36:01,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 37 events. 10/37 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 96 event pairs, 0 based on Foata normal form. 6/40 useless extension candidates. Maximal degree in co-relation 67. Up to 22 conditions per place. [2023-08-26 12:36:01,735 INFO L140 encePairwiseOnDemand]: 275/279 looper letters, 13 selfloop transitions, 2 changer transitions 0/17 dead transitions. [2023-08-26 12:36:01,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 17 transitions, 75 flow [2023-08-26 12:36:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:36:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:36:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 453 transitions. [2023-08-26 12:36:01,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40591397849462363 [2023-08-26 12:36:01,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 453 transitions. [2023-08-26 12:36:01,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 453 transitions. [2023-08-26 12:36:01,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:01,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 453 transitions. [2023-08-26 12:36:01,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.25) internal successors, (453), 4 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 12:36:01,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 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 12:36:01,740 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 279.0) internal successors, (1395), 5 states have internal predecessors, (1395), 0 states have call successors, (0), 0 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 12:36:01,740 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 76 flow. Second operand 4 states and 453 transitions. [2023-08-26 12:36:01,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 17 transitions, 75 flow [2023-08-26 12:36:01,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:36:01,741 INFO L231 Difference]: Finished difference. Result has 17 places, 11 transitions, 31 flow [2023-08-26 12:36:01,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=31, PETRI_PLACES=17, PETRI_TRANSITIONS=11} [2023-08-26 12:36:01,741 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -14 predicate places. [2023-08-26 12:36:01,741 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 11 transitions, 31 flow [2023-08-26 12:36:01,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 0 states have call successors, (0), 0 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 12:36:01,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:01,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:36:01,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 12:36:01,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:01,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 12:36:01,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:01,948 INFO L85 PathProgramCache]: Analyzing trace with hash -876933403, now seen corresponding path program 1 times [2023-08-26 12:36:01,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:01,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368490145] [2023-08-26 12:36:01,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:01,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:02,006 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 12:36:02,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:02,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368490145] [2023-08-26 12:36:02,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368490145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:02,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:02,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:02,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121268413] [2023-08-26 12:36:02,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:02,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:02,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:02,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:02,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:02,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 279 [2023-08-26 12:36:02,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 11 transitions, 31 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 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 12:36:02,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:02,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 279 [2023-08-26 12:36:02,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:02,018 INFO L124 PetriNetUnfolderBase]: 8/29 cut-off events. [2023-08-26 12:36:02,018 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 12:36:02,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 29 events. 8/29 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 8 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 52. Up to 25 conditions per place. [2023-08-26 12:36:02,018 INFO L140 encePairwiseOnDemand]: 277/279 looper letters, 7 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2023-08-26 12:36:02,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 10 transitions, 45 flow [2023-08-26 12:36:02,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:02,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-26 12:36:02,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551971326164875 [2023-08-26 12:36:02,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-26 12:36:02,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-26 12:36:02,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:02,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-26 12:36:02,022 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 12:36:02,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 12:36:02,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 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 12:36:02,023 INFO L175 Difference]: Start difference. First operand has 17 places, 11 transitions, 31 flow. Second operand 3 states and 381 transitions. [2023-08-26 12:36:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 10 transitions, 45 flow [2023-08-26 12:36:02,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 42 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:36:02,024 INFO L231 Difference]: Finished difference. Result has 16 places, 10 transitions, 28 flow [2023-08-26 12:36:02,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=28, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2023-08-26 12:36:02,024 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -15 predicate places. [2023-08-26 12:36:02,024 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 28 flow [2023-08-26 12:36:02,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 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 12:36:02,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:02,025 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 12:36:02,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:36:02,025 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 12:36:02,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash -876897776, now seen corresponding path program 1 times [2023-08-26 12:36:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:02,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635391347] [2023-08-26 12:36:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:36:02,045 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:36:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:36:02,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:36:02,067 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:36:02,068 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-26 12:36:02,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 12:36:02,069 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 12:36:02,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 12:36:02,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-26 12:36:02,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 12:36:02,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 12:36:02,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:36:02,070 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 12:36:02,073 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:36:02,074 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:36:02,094 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 12:36:02,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 172 transitions, 362 flow [2023-08-26 12:36:02,120 INFO L124 PetriNetUnfolderBase]: 45/353 cut-off events. [2023-08-26 12:36:02,120 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:36:02,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 353 events. 45/353 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1296 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 225. Up to 9 conditions per place. [2023-08-26 12:36:02,121 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 172 transitions, 362 flow [2023-08-26 12:36:02,123 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 156 places, 172 transitions, 362 flow [2023-08-26 12:36:02,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:36:02,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 172 transitions, 362 flow [2023-08-26 12:36:02,123 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 172 transitions, 362 flow [2023-08-26 12:36:02,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 172 transitions, 362 flow [2023-08-26 12:36:02,142 INFO L124 PetriNetUnfolderBase]: 45/353 cut-off events. [2023-08-26 12:36:02,142 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:36:02,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 353 events. 45/353 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1296 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 225. Up to 9 conditions per place. [2023-08-26 12:36:02,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 9648 [2023-08-26 12:36:04,917 INFO L134 LiptonReduction]: Checked pairs total: 15101 [2023-08-26 12:36:04,917 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-26 12:36:04,918 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:36:04,919 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;@1fb72758, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:36:04,919 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-26 12:36:04,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:36:04,920 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:36:04,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:36:04,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:04,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:04,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:36:04,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:04,921 INFO L85 PathProgramCache]: Analyzing trace with hash 28942, now seen corresponding path program 1 times [2023-08-26 12:36:04,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:04,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815721388] [2023-08-26 12:36:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:04,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:04,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:04,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815721388] [2023-08-26 12:36:04,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815721388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:04,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:04,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:04,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837594008] [2023-08-26 12:36:04,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:04,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:04,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:04,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2023-08-26 12:36:04,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 12:36:04,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:04,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2023-08-26 12:36:04,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:05,193 INFO L124 PetriNetUnfolderBase]: 1997/3257 cut-off events. [2023-08-26 12:36:05,193 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 12:36:05,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6528 conditions, 3257 events. 1997/3257 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 17111 event pairs, 852 based on Foata normal form. 209/2489 useless extension candidates. Maximal degree in co-relation 1252. Up to 3198 conditions per place. [2023-08-26 12:36:05,204 INFO L140 encePairwiseOnDemand]: 311/327 looper letters, 46 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-26 12:36:05,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 218 flow [2023-08-26 12:36:05,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-26 12:36:05,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45769622833843016 [2023-08-26 12:36:05,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-26 12:36:05,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-26 12:36:05,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:05,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-26 12:36:05,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 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 12:36:05,209 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 12:36:05,209 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 12:36:05,210 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 449 transitions. [2023-08-26 12:36:05,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 218 flow [2023-08-26 12:36:05,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 218 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:36:05,215 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 116 flow [2023-08-26 12:36:05,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-26 12:36:05,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2023-08-26 12:36:05,218 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 116 flow [2023-08-26 12:36:05,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 12:36:05,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:05,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:05,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:36:05,220 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:36:05,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:05,220 INFO L85 PathProgramCache]: Analyzing trace with hash 28941, now seen corresponding path program 1 times [2023-08-26 12:36:05,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:05,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669108660] [2023-08-26 12:36:05,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:05,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:05,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:05,241 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 12:36:05,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:05,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669108660] [2023-08-26 12:36:05,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669108660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:05,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:05,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:05,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715774237] [2023-08-26 12:36:05,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:05,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:05,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:05,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:05,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:05,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 327 [2023-08-26 12:36:05,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 12:36:05,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:05,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 327 [2023-08-26 12:36:05,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:05,415 INFO L124 PetriNetUnfolderBase]: 1783/2898 cut-off events. [2023-08-26 12:36:05,416 INFO L125 PetriNetUnfolderBase]: For 176/176 co-relation queries the response was YES. [2023-08-26 12:36:05,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6017 conditions, 2898 events. 1783/2898 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14826 event pairs, 1536 based on Foata normal form. 0/2163 useless extension candidates. Maximal degree in co-relation 5955. Up to 2675 conditions per place. [2023-08-26 12:36:05,427 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 48 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-26 12:36:05,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 238 flow [2023-08-26 12:36:05,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:05,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-26 12:36:05,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45871559633027525 [2023-08-26 12:36:05,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-26 12:36:05,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-26 12:36:05,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:05,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-26 12:36:05,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 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 12:36:05,433 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 12:36:05,433 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 12:36:05,434 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 116 flow. Second operand 3 states and 450 transitions. [2023-08-26 12:36:05,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 238 flow [2023-08-26 12:36:05,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:36:05,439 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 114 flow [2023-08-26 12:36:05,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-26 12:36:05,440 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 1 predicate places. [2023-08-26 12:36:05,441 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 114 flow [2023-08-26 12:36:05,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 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 12:36:05,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:05,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:36:05,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:36:05,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:36:05,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:05,442 INFO L85 PathProgramCache]: Analyzing trace with hash 978819725, now seen corresponding path program 1 times [2023-08-26 12:36:05,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:05,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232472645] [2023-08-26 12:36:05,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:05,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:05,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:05,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232472645] [2023-08-26 12:36:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232472645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:36:05,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23306031] [2023-08-26 12:36:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:05,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:05,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:36:05,506 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:36:05,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 12:36:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:05,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:36:05,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:36:05,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:36:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:05,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:36:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:05,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23306031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:36:05,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:36:05,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:36:05,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313580289] [2023-08-26 12:36:05,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:36:05,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:36:05,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:05,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:36:05,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:36:05,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 327 [2023-08-26 12:36:05,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 114 flow. Second operand has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 12:36:05,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:05,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 327 [2023-08-26 12:36:05,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:05,756 INFO L124 PetriNetUnfolderBase]: 257/516 cut-off events. [2023-08-26 12:36:05,756 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-26 12:36:05,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 516 events. 257/516 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2396 event pairs, 0 based on Foata normal form. 64/508 useless extension candidates. Maximal degree in co-relation 1167. Up to 306 conditions per place. [2023-08-26 12:36:05,758 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 38 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2023-08-26 12:36:05,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 188 flow [2023-08-26 12:36:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:36:05,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:36:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 685 transitions. [2023-08-26 12:36:05,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41896024464831805 [2023-08-26 12:36:05,760 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 685 transitions. [2023-08-26 12:36:05,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 685 transitions. [2023-08-26 12:36:05,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:05,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 685 transitions. [2023-08-26 12:36:05,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.0) internal successors, (685), 5 states have internal predecessors, (685), 0 states have call successors, (0), 0 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 12:36:05,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 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 12:36:05,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 327.0) internal successors, (1962), 6 states have internal predecessors, (1962), 0 states have call successors, (0), 0 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 12:36:05,764 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 114 flow. Second operand 5 states and 685 transitions. [2023-08-26 12:36:05,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 188 flow [2023-08-26 12:36:05,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 43 transitions, 185 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:36:05,766 INFO L231 Difference]: Finished difference. Result has 32 places, 21 transitions, 65 flow [2023-08-26 12:36:05,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=65, PETRI_PLACES=32, PETRI_TRANSITIONS=21} [2023-08-26 12:36:05,766 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -12 predicate places. [2023-08-26 12:36:05,766 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 21 transitions, 65 flow [2023-08-26 12:36:05,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 129.875) internal successors, (1039), 8 states have internal predecessors, (1039), 0 states have call successors, (0), 0 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 12:36:05,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:05,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:36:05,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 12:36:05,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-26 12:36:05,971 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:36:05,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:05,972 INFO L85 PathProgramCache]: Analyzing trace with hash 979048294, now seen corresponding path program 1 times [2023-08-26 12:36:05,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:05,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559143480] [2023-08-26 12:36:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:05,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:06,003 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 12:36:06,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:06,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559143480] [2023-08-26 12:36:06,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559143480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:06,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:06,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:06,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680529390] [2023-08-26 12:36:06,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:06,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:06,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:06,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:06,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:06,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 327 [2023-08-26 12:36:06,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 21 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 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 12:36:06,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:06,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 327 [2023-08-26 12:36:06,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:06,039 INFO L124 PetriNetUnfolderBase]: 160/297 cut-off events. [2023-08-26 12:36:06,039 INFO L125 PetriNetUnfolderBase]: For 142/142 co-relation queries the response was YES. [2023-08-26 12:36:06,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 297 events. 160/297 cut-off events. For 142/142 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1093 event pairs, 160 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 691. Up to 288 conditions per place. [2023-08-26 12:36:06,040 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 15 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-26 12:36:06,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 18 transitions, 91 flow [2023-08-26 12:36:06,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:06,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-08-26 12:36:06,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4525993883792049 [2023-08-26 12:36:06,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-08-26 12:36:06,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-08-26 12:36:06,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:06,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-08-26 12:36:06,043 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 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 12:36:06,044 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 12:36:06,045 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 12:36:06,045 INFO L175 Difference]: Start difference. First operand has 32 places, 21 transitions, 65 flow. Second operand 3 states and 444 transitions. [2023-08-26 12:36:06,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 18 transitions, 91 flow [2023-08-26 12:36:06,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 18 transitions, 84 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 12:36:06,046 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 54 flow [2023-08-26 12:36:06,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-08-26 12:36:06,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -16 predicate places. [2023-08-26 12:36:06,047 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 54 flow [2023-08-26 12:36:06,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 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 12:36:06,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:06,049 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 12:36:06,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:36:06,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:36:06,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2078556413, now seen corresponding path program 1 times [2023-08-26 12:36:06,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:06,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656371302] [2023-08-26 12:36:06,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:06,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:36:06,060 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:36:06,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:36:06,080 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:36:06,080 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:36:06,080 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-26 12:36:06,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-26 12:36:06,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-26 12:36:06,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-26 12:36:06,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-08-26 12:36:06,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (2 of 8 remaining) [2023-08-26 12:36:06,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (1 of 8 remaining) [2023-08-26 12:36:06,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (0 of 8 remaining) [2023-08-26 12:36:06,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:36:06,081 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 12:36:06,081 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:36:06,081 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 12:36:06,094 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 12:36:06,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 198 transitions, 426 flow [2023-08-26 12:36:06,123 INFO L124 PetriNetUnfolderBase]: 68/520 cut-off events. [2023-08-26 12:36:06,124 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:36:06,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 520 events. 68/520 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2153 event pairs, 1 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2023-08-26 12:36:06,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 198 transitions, 426 flow [2023-08-26 12:36:06,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 198 transitions, 426 flow [2023-08-26 12:36:06,128 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:36:06,128 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 198 transitions, 426 flow [2023-08-26 12:36:06,128 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 198 transitions, 426 flow [2023-08-26 12:36:06,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 198 transitions, 426 flow [2023-08-26 12:36:06,156 INFO L124 PetriNetUnfolderBase]: 68/520 cut-off events. [2023-08-26 12:36:06,156 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:36:06,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 520 events. 68/520 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2153 event pairs, 1 based on Foata normal form. 0/421 useless extension candidates. Maximal degree in co-relation 361. Up to 16 conditions per place. [2023-08-26 12:36:06,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 16416 [2023-08-26 12:36:08,967 INFO L134 LiptonReduction]: Checked pairs total: 27565 [2023-08-26 12:36:08,967 INFO L136 LiptonReduction]: Total number of compositions: 182 [2023-08-26 12:36:08,968 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:36:08,968 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;@1fb72758, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:36:08,968 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 12:36:08,969 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:36:08,969 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:36:08,969 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:36:08,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:08,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:08,970 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:36:08,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash 41930, now seen corresponding path program 1 times [2023-08-26 12:36:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:08,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303735714] [2023-08-26 12:36:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:08,999 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 12:36:08,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:08,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303735714] [2023-08-26 12:36:08,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303735714] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:08,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:08,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:08,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102926438] [2023-08-26 12:36:08,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:09,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:09,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:09,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:09,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 380 [2023-08-26 12:36:09,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 69 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 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 12:36:09,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:09,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 380 [2023-08-26 12:36:09,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:10,528 INFO L124 PetriNetUnfolderBase]: 21807/30996 cut-off events. [2023-08-26 12:36:10,528 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-08-26 12:36:10,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62231 conditions, 30996 events. 21807/30996 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 1200. Compared 195033 event pairs, 13597 based on Foata normal form. 3836/25294 useless extension candidates. Maximal degree in co-relation 6480. Up to 30689 conditions per place. [2023-08-26 12:36:10,711 INFO L140 encePairwiseOnDemand]: 360/380 looper letters, 53 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-26 12:36:10,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 60 transitions, 260 flow [2023-08-26 12:36:10,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:10,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:10,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-26 12:36:10,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543859649122807 [2023-08-26 12:36:10,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-26 12:36:10,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-26 12:36:10,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:10,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-26 12:36:10,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 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 12:36:10,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 12:36:10,716 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 12:36:10,716 INFO L175 Difference]: Start difference. First operand has 55 places, 69 transitions, 168 flow. Second operand 3 states and 518 transitions. [2023-08-26 12:36:10,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 60 transitions, 260 flow [2023-08-26 12:36:10,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 60 transitions, 260 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:36:10,719 INFO L231 Difference]: Finished difference. Result has 56 places, 52 transitions, 146 flow [2023-08-26 12:36:10,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=56, PETRI_TRANSITIONS=52} [2023-08-26 12:36:10,719 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 1 predicate places. [2023-08-26 12:36:10,719 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 52 transitions, 146 flow [2023-08-26 12:36:10,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 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 12:36:10,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:10,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:10,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:36:10,720 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:36:10,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:10,720 INFO L85 PathProgramCache]: Analyzing trace with hash 41929, now seen corresponding path program 1 times [2023-08-26 12:36:10,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:10,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802508539] [2023-08-26 12:36:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:10,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:10,736 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 12:36:10,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:10,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802508539] [2023-08-26 12:36:10,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802508539] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:10,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:10,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:10,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561219756] [2023-08-26 12:36:10,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:10,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:10,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:10,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:10,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:10,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 380 [2023-08-26 12:36:10,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 52 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 12:36:10,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:10,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 380 [2023-08-26 12:36:10,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:12,076 INFO L124 PetriNetUnfolderBase]: 19390/27550 cut-off events. [2023-08-26 12:36:12,076 INFO L125 PetriNetUnfolderBase]: For 1666/1666 co-relation queries the response was YES. [2023-08-26 12:36:12,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56697 conditions, 27550 events. 19390/27550 cut-off events. For 1666/1666 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 171783 event pairs, 17110 based on Foata normal form. 0/20118 useless extension candidates. Maximal degree in co-relation 56639. Up to 25368 conditions per place. [2023-08-26 12:36:12,259 INFO L140 encePairwiseOnDemand]: 376/380 looper letters, 62 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-26 12:36:12,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 308 flow [2023-08-26 12:36:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:12,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:12,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-26 12:36:12,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4570175438596491 [2023-08-26 12:36:12,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-26 12:36:12,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-26 12:36:12,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:12,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-26 12:36:12,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 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 12:36:12,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 12:36:12,265 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 12:36:12,265 INFO L175 Difference]: Start difference. First operand has 56 places, 52 transitions, 146 flow. Second operand 3 states and 521 transitions. [2023-08-26 12:36:12,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 308 flow [2023-08-26 12:36:12,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:36:12,268 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 144 flow [2023-08-26 12:36:12,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-26 12:36:12,269 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-26 12:36:12,269 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 144 flow [2023-08-26 12:36:12,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 12:36:12,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:12,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:36:12,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:36:12,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:36:12,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash 100191703, now seen corresponding path program 1 times [2023-08-26 12:36:12,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:12,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033041178] [2023-08-26 12:36:12,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:12,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:12,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:12,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033041178] [2023-08-26 12:36:12,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033041178] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:36:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377825280] [2023-08-26 12:36:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:12,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:12,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:36:12,344 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:36:12,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 12:36:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:12,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:36:12,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:36:12,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:36:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:12,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:36:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:12,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377825280] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:36:12,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:36:12,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 12:36:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379824749] [2023-08-26 12:36:12,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:36:12,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:36:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:12,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:36:12,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:36:12,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 380 [2023-08-26 12:36:12,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 144 flow. Second operand has 7 states, 7 states have (on average 148.71428571428572) internal successors, (1041), 7 states have internal predecessors, (1041), 0 states have call successors, (0), 0 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 12:36:12,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:12,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 380 [2023-08-26 12:36:12,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:13,721 INFO L124 PetriNetUnfolderBase]: 18216/26653 cut-off events. [2023-08-26 12:36:13,721 INFO L125 PetriNetUnfolderBase]: For 1986/1986 co-relation queries the response was YES. [2023-08-26 12:36:13,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55308 conditions, 26653 events. 18216/26653 cut-off events. For 1986/1986 co-relation queries the response was YES. Maximal size of possible extension queue 1057. Compared 178089 event pairs, 9 based on Foata normal form. 7/20585 useless extension candidates. Maximal degree in co-relation 50945. Up to 21309 conditions per place. [2023-08-26 12:36:13,816 INFO L140 encePairwiseOnDemand]: 376/380 looper letters, 99 selfloop transitions, 6 changer transitions 0/110 dead transitions. [2023-08-26 12:36:13,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 110 transitions, 476 flow [2023-08-26 12:36:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:36:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:36:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 991 transitions. [2023-08-26 12:36:13,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43464912280701756 [2023-08-26 12:36:13,819 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 991 transitions. [2023-08-26 12:36:13,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 991 transitions. [2023-08-26 12:36:13,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:13,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 991 transitions. [2023-08-26 12:36:13,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 165.16666666666666) internal successors, (991), 6 states have internal predecessors, (991), 0 states have call successors, (0), 0 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 12:36:13,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 0 states have call successors, (0), 0 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 12:36:13,824 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 0 states have call successors, (0), 0 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 12:36:13,824 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 144 flow. Second operand 6 states and 991 transitions. [2023-08-26 12:36:13,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 110 transitions, 476 flow [2023-08-26 12:36:13,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:36:13,880 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 156 flow [2023-08-26 12:36:13,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-26 12:36:13,880 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-26 12:36:13,880 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 156 flow [2023-08-26 12:36:13,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 148.71428571428572) internal successors, (1041), 7 states have internal predecessors, (1041), 0 states have call successors, (0), 0 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 12:36:13,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:13,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:36:13,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 12:36:14,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:14,089 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:36:14,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:14,089 INFO L85 PathProgramCache]: Analyzing trace with hash 100480167, now seen corresponding path program 1 times [2023-08-26 12:36:14,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:14,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876066955] [2023-08-26 12:36:14,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:14,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:14,123 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 12:36:14,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:14,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876066955] [2023-08-26 12:36:14,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876066955] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:14,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:14,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:14,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760828819] [2023-08-26 12:36:14,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:14,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:14,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:14,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:14,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:14,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 380 [2023-08-26 12:36:14,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 156 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 12:36:14,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:14,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 380 [2023-08-26 12:36:14,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:15,664 INFO L124 PetriNetUnfolderBase]: 21946/31835 cut-off events. [2023-08-26 12:36:15,664 INFO L125 PetriNetUnfolderBase]: For 2167/2167 co-relation queries the response was YES. [2023-08-26 12:36:15,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64448 conditions, 31835 events. 21946/31835 cut-off events. For 2167/2167 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 198612 event pairs, 9304 based on Foata normal form. 0/24391 useless extension candidates. Maximal degree in co-relation 7446. Up to 21120 conditions per place. [2023-08-26 12:36:15,761 INFO L140 encePairwiseOnDemand]: 374/380 looper letters, 70 selfloop transitions, 2 changer transitions 1/78 dead transitions. [2023-08-26 12:36:15,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 78 transitions, 365 flow [2023-08-26 12:36:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 554 transitions. [2023-08-26 12:36:15,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48596491228070177 [2023-08-26 12:36:15,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 554 transitions. [2023-08-26 12:36:15,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 554 transitions. [2023-08-26 12:36:15,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:15,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 554 transitions. [2023-08-26 12:36:15,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.66666666666666) internal successors, (554), 3 states have internal predecessors, (554), 0 states have call successors, (0), 0 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 12:36:15,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 12:36:15,767 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 12:36:15,767 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 156 flow. Second operand 3 states and 554 transitions. [2023-08-26 12:36:15,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 78 transitions, 365 flow [2023-08-26 12:36:15,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 78 transitions, 350 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 12:36:15,769 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 159 flow [2023-08-26 12:36:15,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-08-26 12:36:15,769 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-26 12:36:15,769 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 159 flow [2023-08-26 12:36:15,770 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 12:36:15,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:15,770 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 12:36:15,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:36:15,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:36:15,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:15,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1911290949, now seen corresponding path program 1 times [2023-08-26 12:36:15,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:15,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541013174] [2023-08-26 12:36:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:15,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-26 12:36:15,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:15,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541013174] [2023-08-26 12:36:15,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541013174] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:15,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:15,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:36:15,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611656922] [2023-08-26 12:36:15,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:15,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:15,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:15,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:15,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:15,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 380 [2023-08-26 12:36:15,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 12:36:15,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:15,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 380 [2023-08-26 12:36:15,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:17,856 INFO L124 PetriNetUnfolderBase]: 29493/42545 cut-off events. [2023-08-26 12:36:17,856 INFO L125 PetriNetUnfolderBase]: For 4063/4063 co-relation queries the response was YES. [2023-08-26 12:36:17,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90415 conditions, 42545 events. 29493/42545 cut-off events. For 4063/4063 co-relation queries the response was YES. Maximal size of possible extension queue 1288. Compared 279158 event pairs, 19808 based on Foata normal form. 0/36448 useless extension candidates. Maximal degree in co-relation 26072. Up to 31435 conditions per place. [2023-08-26 12:36:17,987 INFO L140 encePairwiseOnDemand]: 376/380 looper letters, 71 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-08-26 12:36:17,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 376 flow [2023-08-26 12:36:17,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 555 transitions. [2023-08-26 12:36:17,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868421052631579 [2023-08-26 12:36:17,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 555 transitions. [2023-08-26 12:36:17,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 555 transitions. [2023-08-26 12:36:17,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:17,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 555 transitions. [2023-08-26 12:36:17,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.0) internal successors, (555), 3 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 12:36:17,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 12:36:17,992 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 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 12:36:17,992 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 159 flow. Second operand 3 states and 555 transitions. [2023-08-26 12:36:17,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 376 flow [2023-08-26 12:36:17,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 80 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:36:17,994 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 179 flow [2023-08-26 12:36:17,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2023-08-26 12:36:17,995 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-08-26 12:36:17,995 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 179 flow [2023-08-26 12:36:17,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 states have internal predecessors, (491), 0 states have call successors, (0), 0 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 12:36:17,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:17,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:36:17,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:36:17,995 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:36:17,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:17,996 INFO L85 PathProgramCache]: Analyzing trace with hash 879555339, now seen corresponding path program 1 times [2023-08-26 12:36:17,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:17,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632364666] [2023-08-26 12:36:17,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:17,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:18,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-26 12:36:18,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:18,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632364666] [2023-08-26 12:36:18,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632364666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:18,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:18,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:36:18,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578271488] [2023-08-26 12:36:18,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:18,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:36:18,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:18,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:36:18,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:36:18,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 380 [2023-08-26 12:36:18,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 179 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 12:36:18,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:18,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 380 [2023-08-26 12:36:18,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:19,957 INFO L124 PetriNetUnfolderBase]: 26634/38622 cut-off events. [2023-08-26 12:36:19,957 INFO L125 PetriNetUnfolderBase]: For 5249/5249 co-relation queries the response was YES. [2023-08-26 12:36:20,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85211 conditions, 38622 events. 26634/38622 cut-off events. For 5249/5249 co-relation queries the response was YES. Maximal size of possible extension queue 1201. Compared 251242 event pairs, 20619 based on Foata normal form. 0/34928 useless extension candidates. Maximal degree in co-relation 24586. Up to 31260 conditions per place. [2023-08-26 12:36:20,102 INFO L140 encePairwiseOnDemand]: 375/380 looper letters, 88 selfloop transitions, 4 changer transitions 0/97 dead transitions. [2023-08-26 12:36:20,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 97 transitions, 474 flow [2023-08-26 12:36:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:36:20,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:36:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 676 transitions. [2023-08-26 12:36:20,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2023-08-26 12:36:20,105 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 676 transitions. [2023-08-26 12:36:20,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 676 transitions. [2023-08-26 12:36:20,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:20,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 676 transitions. [2023-08-26 12:36:20,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.0) internal successors, (676), 4 states have internal predecessors, (676), 0 states have call successors, (0), 0 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 12:36:20,108 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 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 12:36:20,108 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 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 12:36:20,108 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 179 flow. Second operand 4 states and 676 transitions. [2023-08-26 12:36:20,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 97 transitions, 474 flow [2023-08-26 12:36:20,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 97 transitions, 470 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:36:20,116 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 191 flow [2023-08-26 12:36:20,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2023-08-26 12:36:20,117 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-26 12:36:20,117 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 191 flow [2023-08-26 12:36:20,117 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 12:36:20,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:20,118 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 12:36:20,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:36:20,118 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:36:20,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1449887303, now seen corresponding path program 1 times [2023-08-26 12:36:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:20,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759870252] [2023-08-26 12:36:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:20,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:36:20,128 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:36:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:36:20,136 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:36:20,136 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:36:20,136 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-26 12:36:20,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-26 12:36:20,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 12:36:20,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 12:36:20,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-26 12:36:20,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 12:36:20,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (2 of 9 remaining) [2023-08-26 12:36:20,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (1 of 9 remaining) [2023-08-26 12:36:20,137 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 12:36:20,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:36:20,137 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:36:20,138 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:36:20,138 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 12:36:20,152 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 12:36:20,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 224 transitions, 492 flow [2023-08-26 12:36:20,205 INFO L124 PetriNetUnfolderBase]: 103/763 cut-off events. [2023-08-26 12:36:20,205 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:36:20,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 763 events. 103/763 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3499 event pairs, 6 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 540. Up to 32 conditions per place. [2023-08-26 12:36:20,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 202 places, 224 transitions, 492 flow [2023-08-26 12:36:20,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 202 places, 224 transitions, 492 flow [2023-08-26 12:36:20,212 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:36:20,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 224 transitions, 492 flow [2023-08-26 12:36:20,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 224 transitions, 492 flow [2023-08-26 12:36:20,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 224 transitions, 492 flow [2023-08-26 12:36:20,264 INFO L124 PetriNetUnfolderBase]: 103/763 cut-off events. [2023-08-26 12:36:20,264 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:36:20,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 763 events. 103/763 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3499 event pairs, 6 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 540. Up to 32 conditions per place. [2023-08-26 12:36:20,281 INFO L119 LiptonReduction]: Number of co-enabled transitions 24480 [2023-08-26 12:36:23,370 INFO L134 LiptonReduction]: Checked pairs total: 40693 [2023-08-26 12:36:23,370 INFO L136 LiptonReduction]: Total number of compositions: 203 [2023-08-26 12:36:23,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:36:23,383 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1fb72758, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:36:23,383 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 12:36:23,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:36:23,384 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 12:36:23,384 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:36:23,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:23,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:23,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:36:23,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:23,385 INFO L85 PathProgramCache]: Analyzing trace with hash 56421, now seen corresponding path program 1 times [2023-08-26 12:36:23,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:23,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094706513] [2023-08-26 12:36:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:23,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:23,421 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 12:36:23,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:23,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094706513] [2023-08-26 12:36:23,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094706513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:23,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:23,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:23,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778163079] [2023-08-26 12:36:23,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:23,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:23,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:23,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:23,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:23,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 427 [2023-08-26 12:36:23,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 79 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 12:36:23,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:23,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 427 [2023-08-26 12:36:23,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:34,574 INFO L124 PetriNetUnfolderBase]: 160892/221539 cut-off events. [2023-08-26 12:36:34,575 INFO L125 PetriNetUnfolderBase]: For 9137/9137 co-relation queries the response was YES. [2023-08-26 12:36:34,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438099 conditions, 221539 events. 160892/221539 cut-off events. For 9137/9137 co-relation queries the response was YES. Maximal size of possible extension queue 7900. Compared 1681952 event pairs, 114426 based on Foata normal form. 44738/194909 useless extension candidates. Maximal degree in co-relation 55963. Up to 211433 conditions per place. [2023-08-26 12:36:35,525 INFO L140 encePairwiseOnDemand]: 405/427 looper letters, 59 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-26 12:36:35,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 304 flow [2023-08-26 12:36:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 582 transitions. [2023-08-26 12:36:35,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45433255269320844 [2023-08-26 12:36:35,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 582 transitions. [2023-08-26 12:36:35,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 582 transitions. [2023-08-26 12:36:35,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:35,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 582 transitions. [2023-08-26 12:36:35,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 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 12:36:35,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:36:35,530 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:36:35,530 INFO L175 Difference]: Start difference. First operand has 64 places, 79 transitions, 202 flow. Second operand 3 states and 582 transitions. [2023-08-26 12:36:35,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 304 flow [2023-08-26 12:36:35,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 69 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:36:35,533 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 178 flow [2023-08-26 12:36:35,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-26 12:36:35,533 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 2 predicate places. [2023-08-26 12:36:35,533 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 178 flow [2023-08-26 12:36:35,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 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 12:36:35,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:35,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:35,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 12:36:35,534 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:36:35,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:35,534 INFO L85 PathProgramCache]: Analyzing trace with hash 56420, now seen corresponding path program 1 times [2023-08-26 12:36:35,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:35,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942516242] [2023-08-26 12:36:35,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:35,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:35,549 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 12:36:35,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:35,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942516242] [2023-08-26 12:36:35,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942516242] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:35,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:35,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:35,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41980571] [2023-08-26 12:36:35,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:35,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:35,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:35,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:35,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:35,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 427 [2023-08-26 12:36:35,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 12:36:35,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:35,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 427 [2023-08-26 12:36:35,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:45,822 INFO L124 PetriNetUnfolderBase]: 142645/195948 cut-off events. [2023-08-26 12:36:45,822 INFO L125 PetriNetUnfolderBase]: For 13601/13601 co-relation queries the response was YES. [2023-08-26 12:36:46,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395572 conditions, 195948 events. 142645/195948 cut-off events. For 13601/13601 co-relation queries the response was YES. Maximal size of possible extension queue 6884. Compared 1469743 event pairs, 126801 based on Foata normal form. 0/138570 useless extension candidates. Maximal degree in co-relation 395513. Up to 173293 conditions per place. [2023-08-26 12:36:46,706 INFO L140 encePairwiseOnDemand]: 423/427 looper letters, 72 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-26 12:36:46,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 368 flow [2023-08-26 12:36:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:46,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-26 12:36:46,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45901639344262296 [2023-08-26 12:36:46,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-26 12:36:46,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-26 12:36:46,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:46,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-26 12:36:46,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:46,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:36:46,711 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:36:46,711 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 178 flow. Second operand 3 states and 588 transitions. [2023-08-26 12:36:46,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 368 flow [2023-08-26 12:36:46,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:36:46,714 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 176 flow [2023-08-26 12:36:46,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-26 12:36:46,714 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 1 predicate places. [2023-08-26 12:36:46,714 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 176 flow [2023-08-26 12:36:46,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 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 12:36:46,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:46,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:36:46,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 12:36:46,715 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:36:46,715 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:46,715 INFO L85 PathProgramCache]: Analyzing trace with hash 611578417, now seen corresponding path program 1 times [2023-08-26 12:36:46,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:46,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321239432] [2023-08-26 12:36:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:46,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:46,748 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 12:36:46,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:46,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321239432] [2023-08-26 12:36:46,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321239432] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:46,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:46,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:46,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742404635] [2023-08-26 12:36:46,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:46,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:46,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:46,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:46,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:46,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 427 [2023-08-26 12:36:46,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 12:36:46,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:46,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 427 [2023-08-26 12:36:46,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:57,972 INFO L124 PetriNetUnfolderBase]: 159617/222017 cut-off events. [2023-08-26 12:36:57,972 INFO L125 PetriNetUnfolderBase]: For 10915/10915 co-relation queries the response was YES. [2023-08-26 12:36:58,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448359 conditions, 222017 events. 159617/222017 cut-off events. For 10915/10915 co-relation queries the response was YES. Maximal size of possible extension queue 6586. Compared 1666809 event pairs, 75768 based on Foata normal form. 0/175036 useless extension candidates. Maximal degree in co-relation 401605. Up to 142565 conditions per place. [2023-08-26 12:36:58,980 INFO L140 encePairwiseOnDemand]: 416/427 looper letters, 81 selfloop transitions, 4 changer transitions 0/93 dead transitions. [2023-08-26 12:36:58,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 428 flow [2023-08-26 12:36:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-08-26 12:36:58,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879000780640125 [2023-08-26 12:36:58,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-08-26 12:36:58,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-08-26 12:36:58,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:58,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-08-26 12:36:58,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 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 12:36:58,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:36:58,985 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:36:58,985 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 176 flow. Second operand 3 states and 625 transitions. [2023-08-26 12:36:58,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 428 flow [2023-08-26 12:37:01,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 93 transitions, 422 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:37:01,958 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 214 flow [2023-08-26 12:37:01,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2023-08-26 12:37:01,958 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-26 12:37:01,958 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 214 flow [2023-08-26 12:37:01,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 12:37:01,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:37:01,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:37:01,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 12:37:01,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:37:01,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:37:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 611248591, now seen corresponding path program 1 times [2023-08-26 12:37:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:37:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727018133] [2023-08-26 12:37:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:37:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:37:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:37:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:37:02,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:37:02,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727018133] [2023-08-26 12:37:02,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727018133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:37:02,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289949456] [2023-08-26 12:37:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:37:02,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:37:02,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:37:02,006 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:37:02,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 12:37:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:37:02,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:37:02,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:37:02,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:37:02,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:37:02,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:37:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:37:02,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289949456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:37:02,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:37:02,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 12:37:02,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385348918] [2023-08-26 12:37:02,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:37:02,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:37:02,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:37:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:37:02,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:37:02,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 427 [2023-08-26 12:37:02,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 214 flow. Second operand has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 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 12:37:02,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:37:02,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 427 [2023-08-26 12:37:02,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:37:13,713 INFO L124 PetriNetUnfolderBase]: 159189/221981 cut-off events. [2023-08-26 12:37:13,714 INFO L125 PetriNetUnfolderBase]: For 34960/34960 co-relation queries the response was YES. [2023-08-26 12:37:14,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496761 conditions, 221981 events. 159189/221981 cut-off events. For 34960/34960 co-relation queries the response was YES. Maximal size of possible extension queue 6573. Compared 1678812 event pairs, 37954 based on Foata normal form. 5/189028 useless extension candidates. Maximal degree in co-relation 91443. Up to 207590 conditions per place. [2023-08-26 12:37:14,795 INFO L140 encePairwiseOnDemand]: 422/427 looper letters, 95 selfloop transitions, 8 changer transitions 0/111 dead transitions. [2023-08-26 12:37:14,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 111 transitions, 530 flow [2023-08-26 12:37:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:37:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:37:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1100 transitions. [2023-08-26 12:37:14,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42935206869633097 [2023-08-26 12:37:14,798 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1100 transitions. [2023-08-26 12:37:14,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1100 transitions. [2023-08-26 12:37:14,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:37:14,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1100 transitions. [2023-08-26 12:37:14,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.33333333333334) internal successors, (1100), 6 states have internal predecessors, (1100), 0 states have call successors, (0), 0 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 12:37:14,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 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 12:37:14,803 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 427.0) internal successors, (2989), 7 states have internal predecessors, (2989), 0 states have call successors, (0), 0 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 12:37:14,803 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 214 flow. Second operand 6 states and 1100 transitions. [2023-08-26 12:37:14,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 111 transitions, 530 flow [2023-08-26 12:37:14,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 111 transitions, 522 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:37:14,947 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 264 flow [2023-08-26 12:37:14,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2023-08-26 12:37:14,948 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 10 predicate places. [2023-08-26 12:37:14,948 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 264 flow [2023-08-26 12:37:14,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 167.71428571428572) internal successors, (1174), 7 states have internal predecessors, (1174), 0 states have call successors, (0), 0 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 12:37:14,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:37:14,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 12:37:14,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 12:37:15,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:37:15,153 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:37:15,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:37:15,153 INFO L85 PathProgramCache]: Analyzing trace with hash -128571538, now seen corresponding path program 1 times [2023-08-26 12:37:15,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:37:15,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712872840] [2023-08-26 12:37:15,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:37:15,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:37:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:37:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-26 12:37:15,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:37:15,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712872840] [2023-08-26 12:37:15,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712872840] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:37:15,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:37:15,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:37:15,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626175828] [2023-08-26 12:37:15,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:37:15,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:37:15,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:37:15,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:37:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:37:15,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 427 [2023-08-26 12:37:15,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 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 12:37:15,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:37:15,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 427 [2023-08-26 12:37:15,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:37:32,725 INFO L124 PetriNetUnfolderBase]: 214619/297499 cut-off events. [2023-08-26 12:37:32,726 INFO L125 PetriNetUnfolderBase]: For 43541/43541 co-relation queries the response was YES. [2023-08-26 12:37:33,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 663658 conditions, 297499 events. 214619/297499 cut-off events. For 43541/43541 co-relation queries the response was YES. Maximal size of possible extension queue 9774. Compared 2315639 event pairs, 138853 based on Foata normal form. 0/251719 useless extension candidates. Maximal degree in co-relation 296264. Up to 216687 conditions per place. [2023-08-26 12:37:34,780 INFO L140 encePairwiseOnDemand]: 423/427 looper letters, 88 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2023-08-26 12:37:34,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 542 flow [2023-08-26 12:37:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:37:34,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:37:34,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-26 12:37:34,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48633879781420764 [2023-08-26 12:37:34,786 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-26 12:37:34,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-26 12:37:34,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:37:34,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-26 12:37:34,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 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 12:37:34,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:37:34,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:37:34,789 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 264 flow. Second operand 3 states and 623 transitions. [2023-08-26 12:37:34,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 542 flow [2023-08-26 12:37:34,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 530 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-26 12:37:34,801 INFO L231 Difference]: Finished difference. Result has 76 places, 69 transitions, 277 flow [2023-08-26 12:37:34,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=277, PETRI_PLACES=76, PETRI_TRANSITIONS=69} [2023-08-26 12:37:34,801 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 12 predicate places. [2023-08-26 12:37:34,801 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 69 transitions, 277 flow [2023-08-26 12:37:34,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 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 12:37:34,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:37:34,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:37:34,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 12:37:34,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:37:34,802 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:37:34,802 INFO L85 PathProgramCache]: Analyzing trace with hash 309290910, now seen corresponding path program 1 times [2023-08-26 12:37:34,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:37:34,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581943178] [2023-08-26 12:37:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:37:34,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:37:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:37:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-26 12:37:34,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:37:34,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581943178] [2023-08-26 12:37:34,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581943178] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:37:34,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:37:34,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:37:34,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619692144] [2023-08-26 12:37:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:37:34,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:37:34,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:37:34,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:37:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:37:34,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 427 [2023-08-26 12:37:34,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 168.25) internal successors, (673), 4 states have internal predecessors, (673), 0 states have call successors, (0), 0 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 12:37:34,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:37:34,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 427 [2023-08-26 12:37:34,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:37:50,879 INFO L124 PetriNetUnfolderBase]: 198489/277056 cut-off events. [2023-08-26 12:37:50,879 INFO L125 PetriNetUnfolderBase]: For 48621/48621 co-relation queries the response was YES. [2023-08-26 12:37:51,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636730 conditions, 277056 events. 198489/277056 cut-off events. For 48621/48621 co-relation queries the response was YES. Maximal size of possible extension queue 8963. Compared 2141350 event pairs, 153026 based on Foata normal form. 0/243632 useless extension candidates. Maximal degree in co-relation 285659. Up to 222290 conditions per place. [2023-08-26 12:37:52,572 INFO L140 encePairwiseOnDemand]: 422/427 looper letters, 110 selfloop transitions, 4 changer transitions 1/123 dead transitions. [2023-08-26 12:37:52,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 123 transitions, 663 flow [2023-08-26 12:37:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:37:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:37:52,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 768 transitions. [2023-08-26 12:37:52,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496487119437939 [2023-08-26 12:37:52,574 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 768 transitions. [2023-08-26 12:37:52,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 768 transitions. [2023-08-26 12:37:52,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:37:52,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 768 transitions. [2023-08-26 12:37:52,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 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 12:37:52,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 427.0) internal successors, (2135), 5 states have internal predecessors, (2135), 0 states have call successors, (0), 0 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 12:37:52,577 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 427.0) internal successors, (2135), 5 states have internal predecessors, (2135), 0 states have call successors, (0), 0 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 12:37:52,577 INFO L175 Difference]: Start difference. First operand has 76 places, 69 transitions, 277 flow. Second operand 4 states and 768 transitions. [2023-08-26 12:37:52,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 123 transitions, 663 flow [2023-08-26 12:37:52,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 123 transitions, 658 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:37:52,850 INFO L231 Difference]: Finished difference. Result has 79 places, 70 transitions, 288 flow [2023-08-26 12:37:52,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=79, PETRI_TRANSITIONS=70} [2023-08-26 12:37:52,850 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 15 predicate places. [2023-08-26 12:37:52,850 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 70 transitions, 288 flow [2023-08-26 12:37:52,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 168.25) internal successors, (673), 4 states have internal predecessors, (673), 0 states have call successors, (0), 0 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 12:37:52,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:37:52,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:37:52,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 12:37:52,851 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:37:52,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:37:52,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2100926521, now seen corresponding path program 1 times [2023-08-26 12:37:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:37:52,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637246685] [2023-08-26 12:37:52,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:37:52,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:37:52,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:37:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-26 12:37:52,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:37:52,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637246685] [2023-08-26 12:37:52,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637246685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:37:52,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:37:52,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:37:52,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501495914] [2023-08-26 12:37:52,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:37:52,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:37:52,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:37:52,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:37:52,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:37:52,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 427 [2023-08-26 12:37:52,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 70 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 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 12:37:52,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:37:52,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 427 [2023-08-26 12:37:52,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:38:31,183 INFO L124 PetriNetUnfolderBase]: 435046/607376 cut-off events. [2023-08-26 12:38:31,184 INFO L125 PetriNetUnfolderBase]: For 160073/160073 co-relation queries the response was YES. [2023-08-26 12:38:33,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1430367 conditions, 607376 events. 435046/607376 cut-off events. For 160073/160073 co-relation queries the response was YES. Maximal size of possible extension queue 8249. Compared 4623023 event pairs, 172648 based on Foata normal form. 49130/607813 useless extension candidates. Maximal degree in co-relation 938703. Up to 368263 conditions per place. [2023-08-26 12:38:35,669 INFO L140 encePairwiseOnDemand]: 410/427 looper letters, 106 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2023-08-26 12:38:35,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 128 transitions, 781 flow [2023-08-26 12:38:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:38:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:38:35,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2023-08-26 12:38:35,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45511319281811086 [2023-08-26 12:38:35,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2023-08-26 12:38:35,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2023-08-26 12:38:35,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:38:35,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2023-08-26 12:38:35,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 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 12:38:35,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:38:35,673 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 0 states have call successors, (0), 0 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 12:38:35,673 INFO L175 Difference]: Start difference. First operand has 79 places, 70 transitions, 288 flow. Second operand 3 states and 583 transitions. [2023-08-26 12:38:35,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 128 transitions, 781 flow