/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/queue_longer.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:26:47,724 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:26:47,805 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 11:26:47,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:26:47,810 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:26:47,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:26:47,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:26:47,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:26:47,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:26:47,845 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:26:47,846 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:26:47,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:26:47,846 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:26:47,847 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:26:47,848 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:26:47,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:26:47,848 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:26:47,848 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:26:47,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:26:47,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:26:47,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:26:47,850 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:26:47,850 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:26:47,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:26:47,851 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:26:47,851 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:26:47,851 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:26:47,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:26:47,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:26:47,852 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:26:47,853 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:26:47,853 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:26:47,853 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:26:47,853 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:26:47,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:26:47,854 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:26:48,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:26:48,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:26:48,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:26:48,175 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:26:48,176 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:26:48,177 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue_longer.i [2023-08-26 11:26:49,303 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:26:49,638 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:26:49,638 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue_longer.i [2023-08-26 11:26:49,660 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36dbae54e/83a6d6a7123c44e5bcdbc12b0ce1b835/FLAGb23b5fe9e [2023-08-26 11:26:49,676 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36dbae54e/83a6d6a7123c44e5bcdbc12b0ce1b835 [2023-08-26 11:26:49,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:26:49,682 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:26:49,684 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:26:49,684 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:26:49,687 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:26:49,688 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:26:49" (1/1) ... [2023-08-26 11:26:49,688 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5b3152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:49, skipping insertion in model container [2023-08-26 11:26:49,689 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:26:49" (1/1) ... [2023-08-26 11:26:49,743 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:26:50,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:26:50,172 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:26:50,188 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-26 11:26:50,190 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-26 11:26:50,198 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [750] [2023-08-26 11:26:50,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:26:50,270 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:26:50,271 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50 WrapperNode [2023-08-26 11:26:50,271 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:26:50,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:26:50,272 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:26:50,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:26:50,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,292 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,322 INFO L138 Inliner]: procedures = 274, calls = 63, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 252 [2023-08-26 11:26:50,323 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:26:50,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:26:50,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:26:50,323 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:26:50,331 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,336 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,337 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,349 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:26:50,358 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:26:50,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:26:50,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:26:50,358 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:26:50,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:26:50,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 11:26:50,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 11:26:50,437 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 11:26:50,438 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 11:26:50,438 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 11:26:50,438 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 11:26:50,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:26:50,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:26:50,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:26:50,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:26:50,439 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 11:26:50,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:26:50,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:26:50,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:26:50,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:26:50,440 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 11:26:50,565 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:26:50,567 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:26:51,121 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:26:51,129 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:26:51,129 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:26:51,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:26:51 BoogieIcfgContainer [2023-08-26 11:26:51,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:26:51,133 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:26:51,133 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:26:51,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:26:51,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:26:49" (1/3) ... [2023-08-26 11:26:51,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15748b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:26:51, skipping insertion in model container [2023-08-26 11:26:51,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (2/3) ... [2023-08-26 11:26:51,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15748b36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:26:51, skipping insertion in model container [2023-08-26 11:26:51,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:26:51" (3/3) ... [2023-08-26 11:26:51,138 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_longer.i [2023-08-26 11:26:51,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:26:51,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 79 error locations. [2023-08-26 11:26:51,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:26:51,296 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 11:26:51,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 346 transitions, 708 flow [2023-08-26 11:26:51,460 INFO L124 PetriNetUnfolderBase]: 18/344 cut-off events. [2023-08-26 11:26:51,460 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:26:51,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 344 events. 18/344 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 802 event pairs, 0 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 253. Up to 2 conditions per place. [2023-08-26 11:26:51,469 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 346 transitions, 708 flow [2023-08-26 11:26:51,477 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 324 places, 335 transitions, 679 flow [2023-08-26 11:26:51,480 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:26:51,488 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 324 places, 335 transitions, 679 flow [2023-08-26 11:26:51,489 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 324 places, 335 transitions, 679 flow [2023-08-26 11:26:51,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 324 places, 335 transitions, 679 flow [2023-08-26 11:26:51,542 INFO L124 PetriNetUnfolderBase]: 18/335 cut-off events. [2023-08-26 11:26:51,543 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:26:51,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 335 events. 18/335 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 768 event pairs, 0 based on Foata normal form. 0/238 useless extension candidates. Maximal degree in co-relation 253. Up to 2 conditions per place. [2023-08-26 11:26:51,561 INFO L119 LiptonReduction]: Number of co-enabled transitions 30836 [2023-08-26 11:27:03,593 INFO L134 LiptonReduction]: Checked pairs total: 110142 [2023-08-26 11:27:03,593 INFO L136 LiptonReduction]: Total number of compositions: 446 [2023-08-26 11:27:03,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:27:03,611 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;@1ea17b0a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:27:03,611 INFO L358 AbstractCegarLoop]: Starting to check reachability of 141 error locations. [2023-08-26 11:27:03,612 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:27:03,612 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:27:03,612 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:27:03,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:03,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:27:03,613 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:03,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:03,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1473, now seen corresponding path program 1 times [2023-08-26 11:27:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:03,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681239366] [2023-08-26 11:27:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:03,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:03,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:03,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:03,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681239366] [2023-08-26 11:27:03,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681239366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:03,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:03,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:27:03,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7193775] [2023-08-26 11:27:03,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:03,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:27:03,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:27:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:27:03,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 330 out of 792 [2023-08-26 11:27:03,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 141 transitions, 291 flow. Second operand has 2 states, 2 states have (on average 330.5) internal successors, (661), 2 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:03,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:03,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 330 of 792 [2023-08-26 11:27:03,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:04,979 INFO L124 PetriNetUnfolderBase]: 7535/12133 cut-off events. [2023-08-26 11:27:04,979 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2023-08-26 11:27:04,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23627 conditions, 12133 events. 7535/12133 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 72846 event pairs, 6615 based on Foata normal form. 176/6479 useless extension candidates. Maximal degree in co-relation 23235. Up to 11381 conditions per place. [2023-08-26 11:27:05,061 INFO L140 encePairwiseOnDemand]: 743/792 looper letters, 82 selfloop transitions, 0 changer transitions 0/92 dead transitions. [2023-08-26 11:27:05,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 357 flow [2023-08-26 11:27:05,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:27:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:27:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 791 transitions. [2023-08-26 11:27:05,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49936868686868685 [2023-08-26 11:27:05,079 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 791 transitions. [2023-08-26 11:27:05,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 791 transitions. [2023-08-26 11:27:05,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:05,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 791 transitions. [2023-08-26 11:27:05,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 395.5) internal successors, (791), 2 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:05,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 792.0) internal successors, (2376), 3 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:05,101 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 792.0) internal successors, (2376), 3 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:05,103 INFO L175 Difference]: Start difference. First operand has 138 places, 141 transitions, 291 flow. Second operand 2 states and 791 transitions. [2023-08-26 11:27:05,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 357 flow [2023-08-26 11:27:05,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 352 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:27:05,112 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 188 flow [2023-08-26 11:27:05,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=188, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2023-08-26 11:27:05,121 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -49 predicate places. [2023-08-26 11:27:05,121 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 188 flow [2023-08-26 11:27:05,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 330.5) internal successors, (661), 2 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:05,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:05,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:27:05,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:27:05,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:05,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:05,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1460667, now seen corresponding path program 1 times [2023-08-26 11:27:05,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:05,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717453150] [2023-08-26 11:27:05,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:05,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:05,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:05,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717453150] [2023-08-26 11:27:05,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717453150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:05,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:05,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:05,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838429523] [2023-08-26 11:27:05,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:05,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:05,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:05,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:05,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:05,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 792 [2023-08-26 11:27:05,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:05,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:05,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 792 [2023-08-26 11:27:05,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:06,462 INFO L124 PetriNetUnfolderBase]: 8459/13321 cut-off events. [2023-08-26 11:27:06,462 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:06,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26191 conditions, 13321 events. 8459/13321 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 76447 event pairs, 7486 based on Foata normal form. 0/6794 useless extension candidates. Maximal degree in co-relation 26188. Up to 12776 conditions per place. [2023-08-26 11:27:06,533 INFO L140 encePairwiseOnDemand]: 789/792 looper letters, 83 selfloop transitions, 1 changer transitions 0/90 dead transitions. [2023-08-26 11:27:06,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 90 transitions, 352 flow [2023-08-26 11:27:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 812 transitions. [2023-08-26 11:27:06,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34175084175084175 [2023-08-26 11:27:06,537 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 812 transitions. [2023-08-26 11:27:06,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 812 transitions. [2023-08-26 11:27:06,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:06,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 812 transitions. [2023-08-26 11:27:06,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:06,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:06,546 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:06,546 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 188 flow. Second operand 3 states and 812 transitions. [2023-08-26 11:27:06,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 90 transitions, 352 flow [2023-08-26 11:27:06,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 90 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:27:06,550 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 186 flow [2023-08-26 11:27:06,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2023-08-26 11:27:06,551 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -49 predicate places. [2023-08-26 11:27:06,552 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 186 flow [2023-08-26 11:27:06,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:06,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:06,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:27:06,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:27:06,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:06,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:06,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1460668, now seen corresponding path program 1 times [2023-08-26 11:27:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:06,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604104982] [2023-08-26 11:27:06,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:06,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:06,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:06,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:06,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604104982] [2023-08-26 11:27:06,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604104982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:06,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:06,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:06,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861406681] [2023-08-26 11:27:06,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:06,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:06,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:06,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:06,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 792 [2023-08-26 11:27:06,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:06,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:06,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 792 [2023-08-26 11:27:06,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:07,684 INFO L124 PetriNetUnfolderBase]: 8385/13176 cut-off events. [2023-08-26 11:27:07,684 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:07,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25906 conditions, 13176 events. 8385/13176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 75229 event pairs, 7419 based on Foata normal form. 0/6752 useless extension candidates. Maximal degree in co-relation 25902. Up to 12634 conditions per place. [2023-08-26 11:27:07,760 INFO L140 encePairwiseOnDemand]: 789/792 looper letters, 81 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-26 11:27:07,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 346 flow [2023-08-26 11:27:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 804 transitions. [2023-08-26 11:27:07,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3383838383838384 [2023-08-26 11:27:07,763 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 804 transitions. [2023-08-26 11:27:07,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 804 transitions. [2023-08-26 11:27:07,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:07,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 804 transitions. [2023-08-26 11:27:07,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.0) internal successors, (804), 3 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:07,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:07,770 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:07,770 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 186 flow. Second operand 3 states and 804 transitions. [2023-08-26 11:27:07,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 346 flow [2023-08-26 11:27:07,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:07,774 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 183 flow [2023-08-26 11:27:07,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2023-08-26 11:27:07,775 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -50 predicate places. [2023-08-26 11:27:07,775 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 183 flow [2023-08-26 11:27:07,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.0) internal successors, (723), 3 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:07,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:07,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:27:07,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:27:07,776 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:07,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:07,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1460741, now seen corresponding path program 1 times [2023-08-26 11:27:07,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:07,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130189265] [2023-08-26 11:27:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:07,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:07,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:08,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:08,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130189265] [2023-08-26 11:27:08,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130189265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:08,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:08,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783387512] [2023-08-26 11:27:08,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:08,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:08,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:08,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:08,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:08,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 792 [2023-08-26 11:27:08,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 183 flow. Second operand has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:08,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:08,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 792 [2023-08-26 11:27:08,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:08,828 INFO L124 PetriNetUnfolderBase]: 7543/11850 cut-off events. [2023-08-26 11:27:08,828 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:08,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23281 conditions, 11850 events. 7543/11850 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 66499 event pairs, 6629 based on Foata normal form. 0/6330 useless extension candidates. Maximal degree in co-relation 23277. Up to 11340 conditions per place. [2023-08-26 11:27:08,882 INFO L140 encePairwiseOnDemand]: 787/792 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-26 11:27:08,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 331 flow [2023-08-26 11:27:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:08,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 799 transitions. [2023-08-26 11:27:08,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362794612794613 [2023-08-26 11:27:08,886 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 799 transitions. [2023-08-26 11:27:08,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 799 transitions. [2023-08-26 11:27:08,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:08,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 799 transitions. [2023-08-26 11:27:08,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.3333333333333) internal successors, (799), 3 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:08,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:08,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:08,894 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 183 flow. Second operand 3 states and 799 transitions. [2023-08-26 11:27:08,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 331 flow [2023-08-26 11:27:08,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 330 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:08,897 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 176 flow [2023-08-26 11:27:08,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2023-08-26 11:27:08,898 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -53 predicate places. [2023-08-26 11:27:08,899 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 176 flow [2023-08-26 11:27:08,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:08,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:08,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:27:08,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:27:08,899 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:08,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:08,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1460743, now seen corresponding path program 1 times [2023-08-26 11:27:08,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:08,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255569636] [2023-08-26 11:27:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:08,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:09,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:09,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255569636] [2023-08-26 11:27:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255569636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:09,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:09,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:09,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245961263] [2023-08-26 11:27:09,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:09,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:09,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:09,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:09,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:09,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 792 [2023-08-26 11:27:09,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:09,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:09,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 792 [2023-08-26 11:27:09,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:09,954 INFO L124 PetriNetUnfolderBase]: 6743/10590 cut-off events. [2023-08-26 11:27:09,954 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:09,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20788 conditions, 10590 events. 6743/10590 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 58226 event pairs, 5881 based on Foata normal form. 0/5914 useless extension candidates. Maximal degree in co-relation 20784. Up to 10112 conditions per place. [2023-08-26 11:27:09,999 INFO L140 encePairwiseOnDemand]: 787/792 looper letters, 73 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-26 11:27:09,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 316 flow [2023-08-26 11:27:10,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:10,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:10,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 786 transitions. [2023-08-26 11:27:10,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33080808080808083 [2023-08-26 11:27:10,002 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 786 transitions. [2023-08-26 11:27:10,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 786 transitions. [2023-08-26 11:27:10,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:10,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 786 transitions. [2023-08-26 11:27:10,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.0) internal successors, (786), 3 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:10,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:10,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:10,010 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 176 flow. Second operand 3 states and 786 transitions. [2023-08-26 11:27:10,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 316 flow [2023-08-26 11:27:10,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 315 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:10,015 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 169 flow [2023-08-26 11:27:10,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-26 11:27:10,019 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -56 predicate places. [2023-08-26 11:27:10,019 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 169 flow [2023-08-26 11:27:10,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:10,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:10,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:27:10,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:27:10,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:10,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:10,020 INFO L85 PathProgramCache]: Analyzing trace with hash 45281025, now seen corresponding path program 1 times [2023-08-26 11:27:10,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:10,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049252277] [2023-08-26 11:27:10,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:10,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:10,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:10,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049252277] [2023-08-26 11:27:10,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049252277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:10,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:10,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:10,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295004332] [2023-08-26 11:27:10,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:10,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:10,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:10,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 792 [2023-08-26 11:27:10,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:10,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:10,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 792 [2023-08-26 11:27:10,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:11,313 INFO L124 PetriNetUnfolderBase]: 6451/10215 cut-off events. [2023-08-26 11:27:11,314 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:11,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19967 conditions, 10215 events. 6451/10215 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 56745 event pairs, 5404 based on Foata normal form. 0/5760 useless extension candidates. Maximal degree in co-relation 19963. Up to 9662 conditions per place. [2023-08-26 11:27:11,357 INFO L140 encePairwiseOnDemand]: 787/792 looper letters, 74 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-26 11:27:11,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 335 flow [2023-08-26 11:27:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:11,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:11,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 907 transitions. [2023-08-26 11:27:11,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38173400673400676 [2023-08-26 11:27:11,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 907 transitions. [2023-08-26 11:27:11,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 907 transitions. [2023-08-26 11:27:11,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:11,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 907 transitions. [2023-08-26 11:27:11,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:11,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:11,368 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:11,368 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 169 flow. Second operand 3 states and 907 transitions. [2023-08-26 11:27:11,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 335 flow [2023-08-26 11:27:11,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 334 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:11,370 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 194 flow [2023-08-26 11:27:11,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2023-08-26 11:27:11,371 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -54 predicate places. [2023-08-26 11:27:11,371 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 194 flow [2023-08-26 11:27:11,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:11,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:11,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:27:11,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:27:11,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:11,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:11,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1403711286, now seen corresponding path program 1 times [2023-08-26 11:27:11,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:11,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707474359] [2023-08-26 11:27:11,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:11,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:11,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:11,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:11,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707474359] [2023-08-26 11:27:11,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707474359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:11,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:11,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:11,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49756057] [2023-08-26 11:27:11,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:11,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:27:11,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:11,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:27:11,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:27:11,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 792 [2023-08-26 11:27:11,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:11,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:11,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 792 [2023-08-26 11:27:11,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:12,409 INFO L124 PetriNetUnfolderBase]: 6989/10966 cut-off events. [2023-08-26 11:27:12,409 INFO L125 PetriNetUnfolderBase]: For 291/291 co-relation queries the response was YES. [2023-08-26 11:27:12,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21920 conditions, 10966 events. 6989/10966 cut-off events. For 291/291 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 61482 event pairs, 1613 based on Foata normal form. 49/6277 useless extension candidates. Maximal degree in co-relation 21915. Up to 10125 conditions per place. [2023-08-26 11:27:12,461 INFO L140 encePairwiseOnDemand]: 787/792 looper letters, 92 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2023-08-26 11:27:12,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 104 transitions, 438 flow [2023-08-26 11:27:12,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:12,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 775 transitions. [2023-08-26 11:27:12,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3261784511784512 [2023-08-26 11:27:12,464 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 775 transitions. [2023-08-26 11:27:12,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 775 transitions. [2023-08-26 11:27:12,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:12,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 775 transitions. [2023-08-26 11:27:12,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 258.3333333333333) internal successors, (775), 3 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:12,470 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:12,470 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:12,471 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 194 flow. Second operand 3 states and 775 transitions. [2023-08-26 11:27:12,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 104 transitions, 438 flow [2023-08-26 11:27:12,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 104 transitions, 434 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:12,473 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 226 flow [2023-08-26 11:27:12,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2023-08-26 11:27:12,473 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -52 predicate places. [2023-08-26 11:27:12,473 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 226 flow [2023-08-26 11:27:12,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:12,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:12,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:27:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:27:12,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:12,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1403732431, now seen corresponding path program 1 times [2023-08-26 11:27:12,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:12,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200844452] [2023-08-26 11:27:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:12,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:12,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200844452] [2023-08-26 11:27:12,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200844452] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:12,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:12,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326187820] [2023-08-26 11:27:12,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:12,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:12,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:12,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:12,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 792 [2023-08-26 11:27:12,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:12,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:12,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 792 [2023-08-26 11:27:12,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:13,135 INFO L124 PetriNetUnfolderBase]: 5053/8076 cut-off events. [2023-08-26 11:27:13,135 INFO L125 PetriNetUnfolderBase]: For 572/572 co-relation queries the response was YES. [2023-08-26 11:27:13,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16632 conditions, 8076 events. 5053/8076 cut-off events. For 572/572 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 43663 event pairs, 4239 based on Foata normal form. 0/5078 useless extension candidates. Maximal degree in co-relation 16626. Up to 7704 conditions per place. [2023-08-26 11:27:13,169 INFO L140 encePairwiseOnDemand]: 790/792 looper letters, 78 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-08-26 11:27:13,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 382 flow [2023-08-26 11:27:13,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:13,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 800 transitions. [2023-08-26 11:27:13,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3367003367003367 [2023-08-26 11:27:13,173 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 800 transitions. [2023-08-26 11:27:13,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 800 transitions. [2023-08-26 11:27:13,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:13,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 800 transitions. [2023-08-26 11:27:13,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,187 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,187 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 226 flow. Second operand 3 states and 800 transitions. [2023-08-26 11:27:13,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 382 flow [2023-08-26 11:27:13,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 85 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:13,189 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 220 flow [2023-08-26 11:27:13,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2023-08-26 11:27:13,190 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -52 predicate places. [2023-08-26 11:27:13,190 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 220 flow [2023-08-26 11:27:13,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:13,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:27:13,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:27:13,191 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:13,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1403732429, now seen corresponding path program 1 times [2023-08-26 11:27:13,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:13,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161606852] [2023-08-26 11:27:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:13,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:13,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:13,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161606852] [2023-08-26 11:27:13,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161606852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:13,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:13,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:13,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907936021] [2023-08-26 11:27:13,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:13,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:27:13,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:13,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:27:13,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:27:13,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 792 [2023-08-26 11:27:13,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:13,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 792 [2023-08-26 11:27:13,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:13,698 INFO L124 PetriNetUnfolderBase]: 3117/5174 cut-off events. [2023-08-26 11:27:13,698 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2023-08-26 11:27:13,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10656 conditions, 5174 events. 3117/5174 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 27102 event pairs, 2558 based on Foata normal form. 0/3750 useless extension candidates. Maximal degree in co-relation 10650. Up to 4924 conditions per place. [2023-08-26 11:27:13,720 INFO L140 encePairwiseOnDemand]: 790/792 looper letters, 77 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-26 11:27:13,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 374 flow [2023-08-26 11:27:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:13,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:13,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 784 transitions. [2023-08-26 11:27:13,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32996632996632996 [2023-08-26 11:27:13,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 784 transitions. [2023-08-26 11:27:13,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 784 transitions. [2023-08-26 11:27:13,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:13,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 784 transitions. [2023-08-26 11:27:13,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,731 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 220 flow. Second operand 3 states and 784 transitions. [2023-08-26 11:27:13,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 374 flow [2023-08-26 11:27:13,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:13,733 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 219 flow [2023-08-26 11:27:13,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-08-26 11:27:13,734 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -52 predicate places. [2023-08-26 11:27:13,734 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 219 flow [2023-08-26 11:27:13,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 238.25) internal successors, (953), 4 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:13,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:27:13,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:27:13,735 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:13,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1403712931, now seen corresponding path program 1 times [2023-08-26 11:27:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:13,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140783893] [2023-08-26 11:27:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:13,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:13,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:13,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:13,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140783893] [2023-08-26 11:27:13,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140783893] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:13,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:13,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:13,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507862295] [2023-08-26 11:27:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:13,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:27:13,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:27:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:27:13,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 792 [2023-08-26 11:27:13,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 220.25) internal successors, (881), 4 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:13,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:13,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 792 [2023-08-26 11:27:13,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:14,528 INFO L124 PetriNetUnfolderBase]: 3383/5654 cut-off events. [2023-08-26 11:27:14,528 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-26 11:27:14,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11469 conditions, 5654 events. 3383/5654 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 29913 event pairs, 1602 based on Foata normal form. 0/4150 useless extension candidates. Maximal degree in co-relation 11463. Up to 2850 conditions per place. [2023-08-26 11:27:14,560 INFO L140 encePairwiseOnDemand]: 785/792 looper letters, 106 selfloop transitions, 5 changer transitions 0/117 dead transitions. [2023-08-26 11:27:14,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 506 flow [2023-08-26 11:27:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:27:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:27:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 983 transitions. [2023-08-26 11:27:14,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31029040404040403 [2023-08-26 11:27:14,564 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 983 transitions. [2023-08-26 11:27:14,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 983 transitions. [2023-08-26 11:27:14,565 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:14,565 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 983 transitions. [2023-08-26 11:27:14,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.75) internal successors, (983), 4 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:14,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 792.0) internal successors, (3960), 5 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:14,572 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 792.0) internal successors, (3960), 5 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:14,572 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 219 flow. Second operand 4 states and 983 transitions. [2023-08-26 11:27:14,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 506 flow [2023-08-26 11:27:14,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:14,577 INFO L231 Difference]: Finished difference. Result has 87 places, 82 transitions, 220 flow [2023-08-26 11:27:14,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=87, PETRI_TRANSITIONS=82} [2023-08-26 11:27:14,579 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -51 predicate places. [2023-08-26 11:27:14,579 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 82 transitions, 220 flow [2023-08-26 11:27:14,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 220.25) internal successors, (881), 4 states have internal predecessors, (881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:14,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:14,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:14,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:27:14,580 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:14,580 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:14,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1501031940, now seen corresponding path program 1 times [2023-08-26 11:27:14,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:14,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011200560] [2023-08-26 11:27:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:14,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:14,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011200560] [2023-08-26 11:27:14,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011200560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:14,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:14,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:14,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221091260] [2023-08-26 11:27:14,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:14,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:14,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:14,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:14,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:14,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 792 [2023-08-26 11:27:14,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 82 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:14,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:14,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 792 [2023-08-26 11:27:14,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:15,016 INFO L124 PetriNetUnfolderBase]: 2026/3482 cut-off events. [2023-08-26 11:27:15,017 INFO L125 PetriNetUnfolderBase]: For 164/164 co-relation queries the response was YES. [2023-08-26 11:27:15,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7140 conditions, 3482 events. 2026/3482 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 16162 event pairs, 1026 based on Foata normal form. 0/2624 useless extension candidates. Maximal degree in co-relation 7133. Up to 1983 conditions per place. [2023-08-26 11:27:15,033 INFO L140 encePairwiseOnDemand]: 788/792 looper letters, 92 selfloop transitions, 3 changer transitions 3/108 dead transitions. [2023-08-26 11:27:15,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 108 transitions, 464 flow [2023-08-26 11:27:15,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:15,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1068 transitions. [2023-08-26 11:27:15,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2023-08-26 11:27:15,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1068 transitions. [2023-08-26 11:27:15,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1068 transitions. [2023-08-26 11:27:15,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:15,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1068 transitions. [2023-08-26 11:27:15,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 356.0) internal successors, (1068), 3 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,055 INFO L175 Difference]: Start difference. First operand has 87 places, 82 transitions, 220 flow. Second operand 3 states and 1068 transitions. [2023-08-26 11:27:15,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 108 transitions, 464 flow [2023-08-26 11:27:15,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 108 transitions, 451 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 11:27:15,058 INFO L231 Difference]: Finished difference. Result has 85 places, 80 transitions, 203 flow [2023-08-26 11:27:15,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=85, PETRI_TRANSITIONS=80} [2023-08-26 11:27:15,059 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -53 predicate places. [2023-08-26 11:27:15,060 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 80 transitions, 203 flow [2023-08-26 11:27:15,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:15,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:15,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:27:15,061 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:15,061 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:15,061 INFO L85 PathProgramCache]: Analyzing trace with hash -236353230, now seen corresponding path program 1 times [2023-08-26 11:27:15,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:15,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012054628] [2023-08-26 11:27:15,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:15,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:15,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:15,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012054628] [2023-08-26 11:27:15,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012054628] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:15,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:15,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:15,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543702852] [2023-08-26 11:27:15,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:15,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:15,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:15,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:15,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 792 [2023-08-26 11:27:15,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 80 transitions, 203 flow. Second operand has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:15,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 792 [2023-08-26 11:27:15,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:15,431 INFO L124 PetriNetUnfolderBase]: 2037/3442 cut-off events. [2023-08-26 11:27:15,432 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2023-08-26 11:27:15,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7180 conditions, 3442 events. 2037/3442 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15327 event pairs, 1636 based on Foata normal form. 0/2574 useless extension candidates. Maximal degree in co-relation 7173. Up to 3300 conditions per place. [2023-08-26 11:27:15,443 INFO L140 encePairwiseOnDemand]: 788/792 looper letters, 70 selfloop transitions, 1 changer transitions 0/77 dead transitions. [2023-08-26 11:27:15,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 77 transitions, 339 flow [2023-08-26 11:27:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 787 transitions. [2023-08-26 11:27:15,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312289562289562 [2023-08-26 11:27:15,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 787 transitions. [2023-08-26 11:27:15,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 787 transitions. [2023-08-26 11:27:15,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:15,447 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 787 transitions. [2023-08-26 11:27:15,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,452 INFO L175 Difference]: Start difference. First operand has 85 places, 80 transitions, 203 flow. Second operand 3 states and 787 transitions. [2023-08-26 11:27:15,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 77 transitions, 339 flow [2023-08-26 11:27:15,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 77 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:15,454 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 196 flow [2023-08-26 11:27:15,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2023-08-26 11:27:15,455 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -55 predicate places. [2023-08-26 11:27:15,455 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 196 flow [2023-08-26 11:27:15,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.33333333333334) internal successors, (727), 3 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:15,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:15,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:27:15,456 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:15,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:15,456 INFO L85 PathProgramCache]: Analyzing trace with hash -236353231, now seen corresponding path program 1 times [2023-08-26 11:27:15,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:15,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303697754] [2023-08-26 11:27:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:15,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:15,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303697754] [2023-08-26 11:27:15,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303697754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:15,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:15,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:27:15,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962337789] [2023-08-26 11:27:15,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:15,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:27:15,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:15,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:27:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:27:15,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 792 [2023-08-26 11:27:15,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:15,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:15,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 792 [2023-08-26 11:27:15,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:16,503 INFO L124 PetriNetUnfolderBase]: 1984/3392 cut-off events. [2023-08-26 11:27:16,503 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-08-26 11:27:16,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7022 conditions, 3392 events. 1984/3392 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15414 event pairs, 1573 based on Foata normal form. 0/2575 useless extension candidates. Maximal degree in co-relation 7015. Up to 3198 conditions per place. [2023-08-26 11:27:16,515 INFO L140 encePairwiseOnDemand]: 785/792 looper letters, 71 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2023-08-26 11:27:16,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 384 flow [2023-08-26 11:27:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:27:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:27:16,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1507 transitions. [2023-08-26 11:27:16,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31712962962962965 [2023-08-26 11:27:16,519 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1507 transitions. [2023-08-26 11:27:16,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1507 transitions. [2023-08-26 11:27:16,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:16,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1507 transitions. [2023-08-26 11:27:16,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.16666666666666) internal successors, (1507), 6 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:16,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 792.0) internal successors, (5544), 7 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:16,528 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 792.0) internal successors, (5544), 7 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:16,528 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 196 flow. Second operand 6 states and 1507 transitions. [2023-08-26 11:27:16,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 384 flow [2023-08-26 11:27:16,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 87 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:16,531 INFO L231 Difference]: Finished difference. Result has 90 places, 83 transitions, 252 flow [2023-08-26 11:27:16,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=90, PETRI_TRANSITIONS=83} [2023-08-26 11:27:16,532 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -48 predicate places. [2023-08-26 11:27:16,532 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 83 transitions, 252 flow [2023-08-26 11:27:16,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:16,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:16,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:16,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:27:16,533 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:16,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:16,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1668559450, now seen corresponding path program 1 times [2023-08-26 11:27:16,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:16,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632282911] [2023-08-26 11:27:16,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:16,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:17,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:17,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632282911] [2023-08-26 11:27:17,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632282911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:17,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:17,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:27:17,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640714765] [2023-08-26 11:27:17,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:17,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:27:17,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:17,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:27:17,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:27:17,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 792 [2023-08-26 11:27:17,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 83 transitions, 252 flow. Second operand has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:17,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:17,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 792 [2023-08-26 11:27:17,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:18,032 INFO L124 PetriNetUnfolderBase]: 2135/3605 cut-off events. [2023-08-26 11:27:18,032 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-26 11:27:18,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7648 conditions, 3605 events. 2135/3605 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 16232 event pairs, 631 based on Foata normal form. 11/2750 useless extension candidates. Maximal degree in co-relation 7638. Up to 3227 conditions per place. [2023-08-26 11:27:18,046 INFO L140 encePairwiseOnDemand]: 785/792 looper letters, 98 selfloop transitions, 13 changer transitions 0/117 dead transitions. [2023-08-26 11:27:18,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 117 transitions, 556 flow [2023-08-26 11:27:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:27:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:27:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1330 transitions. [2023-08-26 11:27:18,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2798821548821549 [2023-08-26 11:27:18,050 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1330 transitions. [2023-08-26 11:27:18,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1330 transitions. [2023-08-26 11:27:18,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:18,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1330 transitions. [2023-08-26 11:27:18,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 221.66666666666666) internal successors, (1330), 6 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 792.0) internal successors, (5544), 7 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,059 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 792.0) internal successors, (5544), 7 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,059 INFO L175 Difference]: Start difference. First operand has 90 places, 83 transitions, 252 flow. Second operand 6 states and 1330 transitions. [2023-08-26 11:27:18,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 117 transitions, 556 flow [2023-08-26 11:27:18,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 117 transitions, 548 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:18,062 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 298 flow [2023-08-26 11:27:18,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=298, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2023-08-26 11:27:18,063 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -42 predicate places. [2023-08-26 11:27:18,063 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 298 flow [2023-08-26 11:27:18,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 205.57142857142858) internal successors, (1439), 7 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:18,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:18,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:27:18,064 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:18,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 757024056, now seen corresponding path program 2 times [2023-08-26 11:27:18,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:18,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578427339] [2023-08-26 11:27:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:18,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:18,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:18,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578427339] [2023-08-26 11:27:18,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578427339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:18,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:18,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:18,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706174314] [2023-08-26 11:27:18,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:18,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:27:18,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:27:18,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:27:18,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 792 [2023-08-26 11:27:18,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 298 flow. Second operand has 4 states, 4 states have (on average 239.75) internal successors, (959), 4 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:18,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 792 [2023-08-26 11:27:18,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:18,518 INFO L124 PetriNetUnfolderBase]: 2118/3584 cut-off events. [2023-08-26 11:27:18,518 INFO L125 PetriNetUnfolderBase]: For 468/468 co-relation queries the response was YES. [2023-08-26 11:27:18,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7719 conditions, 3584 events. 2118/3584 cut-off events. For 468/468 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 16135 event pairs, 1695 based on Foata normal form. 0/2728 useless extension candidates. Maximal degree in co-relation 7706. Up to 3430 conditions per place. [2023-08-26 11:27:18,529 INFO L140 encePairwiseOnDemand]: 790/792 looper letters, 78 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-08-26 11:27:18,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 85 transitions, 454 flow [2023-08-26 11:27:18,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:18,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 778 transitions. [2023-08-26 11:27:18,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3274410774410774 [2023-08-26 11:27:18,531 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 778 transitions. [2023-08-26 11:27:18,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 778 transitions. [2023-08-26 11:27:18,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:18,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 778 transitions. [2023-08-26 11:27:18,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,537 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 298 flow. Second operand 3 states and 778 transitions. [2023-08-26 11:27:18,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 85 transitions, 454 flow [2023-08-26 11:27:18,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 85 transitions, 442 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:18,540 INFO L231 Difference]: Finished difference. Result has 96 places, 85 transitions, 286 flow [2023-08-26 11:27:18,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=96, PETRI_TRANSITIONS=85} [2023-08-26 11:27:18,541 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -42 predicate places. [2023-08-26 11:27:18,541 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 85 transitions, 286 flow [2023-08-26 11:27:18,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 239.75) internal successors, (959), 4 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:18,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:18,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:27:18,542 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:18,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash 802041409, now seen corresponding path program 1 times [2023-08-26 11:27:18,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:18,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073247851] [2023-08-26 11:27:18,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:18,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:18,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:18,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:18,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073247851] [2023-08-26 11:27:18,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073247851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:18,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:18,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 11:27:18,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962433340] [2023-08-26 11:27:18,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:18,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:27:18,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:18,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:27:18,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:27:18,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 792 [2023-08-26 11:27:18,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 85 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 219.71428571428572) internal successors, (1538), 7 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:18,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:18,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 792 [2023-08-26 11:27:18,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:19,018 INFO L124 PetriNetUnfolderBase]: 2123/3601 cut-off events. [2023-08-26 11:27:19,018 INFO L125 PetriNetUnfolderBase]: For 372/372 co-relation queries the response was YES. [2023-08-26 11:27:19,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7697 conditions, 3601 events. 2123/3601 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 16295 event pairs, 757 based on Foata normal form. 0/2759 useless extension candidates. Maximal degree in co-relation 7684. Up to 2616 conditions per place. [2023-08-26 11:27:19,032 INFO L140 encePairwiseOnDemand]: 786/792 looper letters, 100 selfloop transitions, 6 changer transitions 3/115 dead transitions. [2023-08-26 11:27:19,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 115 transitions, 579 flow [2023-08-26 11:27:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:27:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:27:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1408 transitions. [2023-08-26 11:27:19,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962962962962963 [2023-08-26 11:27:19,037 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1408 transitions. [2023-08-26 11:27:19,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1408 transitions. [2023-08-26 11:27:19,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:19,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1408 transitions. [2023-08-26 11:27:19,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 234.66666666666666) internal successors, (1408), 6 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 792.0) internal successors, (5544), 7 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,046 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 792.0) internal successors, (5544), 7 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,046 INFO L175 Difference]: Start difference. First operand has 96 places, 85 transitions, 286 flow. Second operand 6 states and 1408 transitions. [2023-08-26 11:27:19,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 115 transitions, 579 flow [2023-08-26 11:27:19,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 115 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:19,050 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 295 flow [2023-08-26 11:27:19,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2023-08-26 11:27:19,050 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -39 predicate places. [2023-08-26 11:27:19,050 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 295 flow [2023-08-26 11:27:19,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 219.71428571428572) internal successors, (1538), 7 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:19,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:19,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:27:19,051 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:19,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 802040652, now seen corresponding path program 1 times [2023-08-26 11:27:19,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:19,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803673187] [2023-08-26 11:27:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:19,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803673187] [2023-08-26 11:27:19,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803673187] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:19,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:19,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:27:19,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721603927] [2023-08-26 11:27:19,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:19,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:19,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:19,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:19,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:19,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 792 [2023-08-26 11:27:19,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:19,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 792 [2023-08-26 11:27:19,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:19,386 INFO L124 PetriNetUnfolderBase]: 1863/3268 cut-off events. [2023-08-26 11:27:19,386 INFO L125 PetriNetUnfolderBase]: For 415/422 co-relation queries the response was YES. [2023-08-26 11:27:19,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6920 conditions, 3268 events. 1863/3268 cut-off events. For 415/422 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15304 event pairs, 1463 based on Foata normal form. 19/2594 useless extension candidates. Maximal degree in co-relation 6907. Up to 2964 conditions per place. [2023-08-26 11:27:19,403 INFO L140 encePairwiseOnDemand]: 788/792 looper letters, 74 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2023-08-26 11:27:19,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 91 transitions, 473 flow [2023-08-26 11:27:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:19,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1041 transitions. [2023-08-26 11:27:19,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43813131313131315 [2023-08-26 11:27:19,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1041 transitions. [2023-08-26 11:27:19,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1041 transitions. [2023-08-26 11:27:19,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:19,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1041 transitions. [2023-08-26 11:27:19,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.0) internal successors, (1041), 3 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 11:27:19,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,412 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,412 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 295 flow. Second operand 3 states and 1041 transitions. [2023-08-26 11:27:19,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 91 transitions, 473 flow [2023-08-26 11:27:19,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 91 transitions, 462 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 11:27:19,415 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 292 flow [2023-08-26 11:27:19,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=292, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2023-08-26 11:27:19,415 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -41 predicate places. [2023-08-26 11:27:19,416 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 292 flow [2023-08-26 11:27:19,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 327.6666666666667) internal successors, (983), 3 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:19,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:19,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:27:19,416 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:19,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1962690892, now seen corresponding path program 1 times [2023-08-26 11:27:19,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:19,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710301890] [2023-08-26 11:27:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:19,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:19,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:19,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710301890] [2023-08-26 11:27:19,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710301890] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:19,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:19,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:27:19,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616813301] [2023-08-26 11:27:19,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:19,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:27:19,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:19,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:27:19,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:27:19,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 792 [2023-08-26 11:27:19,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 292 flow. Second operand has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:19,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:19,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 792 [2023-08-26 11:27:19,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:20,278 INFO L124 PetriNetUnfolderBase]: 2058/3491 cut-off events. [2023-08-26 11:27:20,278 INFO L125 PetriNetUnfolderBase]: For 397/397 co-relation queries the response was YES. [2023-08-26 11:27:20,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7525 conditions, 3491 events. 2058/3491 cut-off events. For 397/397 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15624 event pairs, 645 based on Foata normal form. 11/2678 useless extension candidates. Maximal degree in co-relation 7512. Up to 2979 conditions per place. [2023-08-26 11:27:20,292 INFO L140 encePairwiseOnDemand]: 787/792 looper letters, 87 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2023-08-26 11:27:20,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 102 transitions, 524 flow [2023-08-26 11:27:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:27:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:27:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1107 transitions. [2023-08-26 11:27:20,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27954545454545454 [2023-08-26 11:27:20,295 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1107 transitions. [2023-08-26 11:27:20,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1107 transitions. [2023-08-26 11:27:20,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:20,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1107 transitions. [2023-08-26 11:27:20,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 221.4) internal successors, (1107), 5 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:20,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 792.0) internal successors, (4752), 6 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:20,300 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 792.0) internal successors, (4752), 6 states have internal predecessors, (4752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:20,301 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 292 flow. Second operand 5 states and 1107 transitions. [2023-08-26 11:27:20,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 102 transitions, 524 flow [2023-08-26 11:27:20,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 102 transitions, 516 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:27:20,304 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 294 flow [2023-08-26 11:27:20,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=294, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2023-08-26 11:27:20,305 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -40 predicate places. [2023-08-26 11:27:20,305 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 294 flow [2023-08-26 11:27:20,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:20,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:20,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:20,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 11:27:20,306 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:20,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:20,306 INFO L85 PathProgramCache]: Analyzing trace with hash -826786252, now seen corresponding path program 1 times [2023-08-26 11:27:20,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:20,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132460311] [2023-08-26 11:27:20,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:20,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:20,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:21,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:21,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132460311] [2023-08-26 11:27:21,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132460311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:21,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:21,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 11:27:21,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937398254] [2023-08-26 11:27:21,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:21,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 11:27:21,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:21,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 11:27:21,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-26 11:27:21,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 792 [2023-08-26 11:27:21,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 294 flow. Second operand has 10 states, 10 states have (on average 218.4) internal successors, (2184), 10 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:21,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:21,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 792 [2023-08-26 11:27:21,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:21,626 INFO L124 PetriNetUnfolderBase]: 2056/3493 cut-off events. [2023-08-26 11:27:21,626 INFO L125 PetriNetUnfolderBase]: For 554/554 co-relation queries the response was YES. [2023-08-26 11:27:21,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7543 conditions, 3493 events. 2056/3493 cut-off events. For 554/554 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15635 event pairs, 1656 based on Foata normal form. 0/2666 useless extension candidates. Maximal degree in co-relation 7530. Up to 3327 conditions per place. [2023-08-26 11:27:21,639 INFO L140 encePairwiseOnDemand]: 780/792 looper letters, 77 selfloop transitions, 18 changer transitions 1/102 dead transitions. [2023-08-26 11:27:21,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 102 transitions, 552 flow [2023-08-26 11:27:21,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:27:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:27:21,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2044 transitions. [2023-08-26 11:27:21,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2867564534231201 [2023-08-26 11:27:21,643 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2044 transitions. [2023-08-26 11:27:21,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2044 transitions. [2023-08-26 11:27:21,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:21,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2044 transitions. [2023-08-26 11:27:21,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 227.11111111111111) internal successors, (2044), 9 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:21,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 792.0) internal successors, (7920), 10 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:21,654 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 792.0) internal successors, (7920), 10 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:21,654 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 294 flow. Second operand 9 states and 2044 transitions. [2023-08-26 11:27:21,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 102 transitions, 552 flow [2023-08-26 11:27:21,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 102 transitions, 534 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 11:27:21,657 INFO L231 Difference]: Finished difference. Result has 106 places, 91 transitions, 381 flow [2023-08-26 11:27:21,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=381, PETRI_PLACES=106, PETRI_TRANSITIONS=91} [2023-08-26 11:27:21,658 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -32 predicate places. [2023-08-26 11:27:21,658 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 381 flow [2023-08-26 11:27:21,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 218.4) internal successors, (2184), 10 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:21,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:21,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:21,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 11:27:21,659 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:21,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 487145513, now seen corresponding path program 1 times [2023-08-26 11:27:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:21,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228534043] [2023-08-26 11:27:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:21,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:22,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:22,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228534043] [2023-08-26 11:27:22,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228534043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:22,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:22,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 11:27:22,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307468888] [2023-08-26 11:27:22,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:22,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 11:27:22,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 11:27:22,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-26 11:27:22,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 792 [2023-08-26 11:27:22,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 381 flow. Second operand has 11 states, 11 states have (on average 189.36363636363637) internal successors, (2083), 11 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:22,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:22,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 792 [2023-08-26 11:27:22,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:23,473 INFO L124 PetriNetUnfolderBase]: 2264/3852 cut-off events. [2023-08-26 11:27:23,474 INFO L125 PetriNetUnfolderBase]: For 554/554 co-relation queries the response was YES. [2023-08-26 11:27:23,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8577 conditions, 3852 events. 2264/3852 cut-off events. For 554/554 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 17825 event pairs, 735 based on Foata normal form. 0/2961 useless extension candidates. Maximal degree in co-relation 8560. Up to 2963 conditions per place. [2023-08-26 11:27:23,501 INFO L140 encePairwiseOnDemand]: 780/792 looper letters, 122 selfloop transitions, 24 changer transitions 3/155 dead transitions. [2023-08-26 11:27:23,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 839 flow [2023-08-26 11:27:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:27:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:27:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1826 transitions. [2023-08-26 11:27:23,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25617283950617287 [2023-08-26 11:27:23,508 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1826 transitions. [2023-08-26 11:27:23,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1826 transitions. [2023-08-26 11:27:23,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:23,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1826 transitions. [2023-08-26 11:27:23,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 202.88888888888889) internal successors, (1826), 9 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:23,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 792.0) internal successors, (7920), 10 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:23,517 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 792.0) internal successors, (7920), 10 states have internal predecessors, (7920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:23,517 INFO L175 Difference]: Start difference. First operand has 106 places, 91 transitions, 381 flow. Second operand 9 states and 1826 transitions. [2023-08-26 11:27:23,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 839 flow [2023-08-26 11:27:23,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 155 transitions, 807 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-26 11:27:23,523 INFO L231 Difference]: Finished difference. Result has 113 places, 96 transitions, 452 flow [2023-08-26 11:27:23,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=452, PETRI_PLACES=113, PETRI_TRANSITIONS=96} [2023-08-26 11:27:23,523 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -25 predicate places. [2023-08-26 11:27:23,523 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 96 transitions, 452 flow [2023-08-26 11:27:23,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 189.36363636363637) internal successors, (2083), 11 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:23,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:23,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:23,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:27:23,524 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:23,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:23,525 INFO L85 PathProgramCache]: Analyzing trace with hash 140615885, now seen corresponding path program 2 times [2023-08-26 11:27:23,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:23,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429373236] [2023-08-26 11:27:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:23,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:27:32,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:32,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429373236] [2023-08-26 11:27:32,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429373236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:32,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:32,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-26 11:27:32,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129591593] [2023-08-26 11:27:32,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:32,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:27:32,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:27:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:27:32,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 792 [2023-08-26 11:27:32,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 96 transitions, 452 flow. Second operand has 13 states, 13 states have (on average 189.15384615384616) internal successors, (2459), 13 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:27:32,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:32,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 792 [2023-08-26 11:27:32,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:04,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-26 11:28:08,172 INFO L124 PetriNetUnfolderBase]: 2510/4282 cut-off events. [2023-08-26 11:28:08,173 INFO L125 PetriNetUnfolderBase]: For 872/872 co-relation queries the response was YES. [2023-08-26 11:28:08,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10030 conditions, 4282 events. 2510/4282 cut-off events. For 872/872 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 20383 event pairs, 1733 based on Foata normal form. 0/3309 useless extension candidates. Maximal degree in co-relation 10010. Up to 3172 conditions per place. [2023-08-26 11:28:08,189 INFO L140 encePairwiseOnDemand]: 779/792 looper letters, 133 selfloop transitions, 26 changer transitions 3/168 dead transitions. [2023-08-26 11:28:08,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 168 transitions, 992 flow [2023-08-26 11:28:08,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:28:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:28:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2024 transitions. [2023-08-26 11:28:08,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25555555555555554 [2023-08-26 11:28:08,193 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2024 transitions. [2023-08-26 11:28:08,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2024 transitions. [2023-08-26 11:28:08,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:08,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2024 transitions. [2023-08-26 11:28:08,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 202.4) internal successors, (2024), 10 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:08,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 792.0) internal successors, (8712), 11 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:08,202 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 792.0) internal successors, (8712), 11 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:08,202 INFO L175 Difference]: Start difference. First operand has 113 places, 96 transitions, 452 flow. Second operand 10 states and 2024 transitions. [2023-08-26 11:28:08,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 168 transitions, 992 flow [2023-08-26 11:28:08,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 944 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 11:28:08,210 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 577 flow [2023-08-26 11:28:08,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=577, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2023-08-26 11:28:08,211 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -16 predicate places. [2023-08-26 11:28:08,211 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 577 flow [2023-08-26 11:28:08,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 189.15384615384616) internal successors, (2459), 13 states have internal predecessors, (2459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:08,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:08,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:08,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 11:28:08,212 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:08,212 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:08,212 INFO L85 PathProgramCache]: Analyzing trace with hash 139376195, now seen corresponding path program 3 times [2023-08-26 11:28:08,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:08,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298466321] [2023-08-26 11:28:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:08,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:09,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:09,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298466321] [2023-08-26 11:28:09,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298466321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:09,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:09,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:28:09,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325666230] [2023-08-26 11:28:09,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:09,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 11:28:09,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 11:28:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-08-26 11:28:09,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 792 [2023-08-26 11:28:09,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 577 flow. Second operand has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:09,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:09,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 792 [2023-08-26 11:28:09,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:10,010 INFO L124 PetriNetUnfolderBase]: 2478/4220 cut-off events. [2023-08-26 11:28:10,010 INFO L125 PetriNetUnfolderBase]: For 1034/1034 co-relation queries the response was YES. [2023-08-26 11:28:10,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10107 conditions, 4220 events. 2478/4220 cut-off events. For 1034/1034 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 20014 event pairs, 756 based on Foata normal form. 0/3264 useless extension candidates. Maximal degree in co-relation 10082. Up to 2637 conditions per place. [2023-08-26 11:28:10,030 INFO L140 encePairwiseOnDemand]: 779/792 looper letters, 124 selfloop transitions, 35 changer transitions 3/168 dead transitions. [2023-08-26 11:28:10,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 168 transitions, 1043 flow [2023-08-26 11:28:10,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:28:10,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:28:10,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2016 transitions. [2023-08-26 11:28:10,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2545454545454545 [2023-08-26 11:28:10,034 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2016 transitions. [2023-08-26 11:28:10,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2016 transitions. [2023-08-26 11:28:10,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:10,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2016 transitions. [2023-08-26 11:28:10,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 201.6) internal successors, (2016), 10 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:10,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 792.0) internal successors, (8712), 11 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:10,042 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 792.0) internal successors, (8712), 11 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:10,042 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 577 flow. Second operand 10 states and 2016 transitions. [2023-08-26 11:28:10,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 168 transitions, 1043 flow [2023-08-26 11:28:10,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 168 transitions, 1010 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-26 11:28:10,050 INFO L231 Difference]: Finished difference. Result has 125 places, 104 transitions, 606 flow [2023-08-26 11:28:10,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=606, PETRI_PLACES=125, PETRI_TRANSITIONS=104} [2023-08-26 11:28:10,051 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -13 predicate places. [2023-08-26 11:28:10,051 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 104 transitions, 606 flow [2023-08-26 11:28:10,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:10,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:10,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:10,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 11:28:10,052 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:10,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash 814474763, now seen corresponding path program 1 times [2023-08-26 11:28:10,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:10,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045488486] [2023-08-26 11:28:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:10,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:10,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:10,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:10,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045488486] [2023-08-26 11:28:10,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045488486] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:10,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:10,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:28:10,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408209467] [2023-08-26 11:28:10,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:10,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:28:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:28:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:28:10,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 792 [2023-08-26 11:28:10,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 104 transitions, 606 flow. Second operand has 13 states, 13 states have (on average 198.30769230769232) internal successors, (2578), 13 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:10,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:10,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 792 [2023-08-26 11:28:10,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:11,764 INFO L124 PetriNetUnfolderBase]: 2685/4570 cut-off events. [2023-08-26 11:28:11,764 INFO L125 PetriNetUnfolderBase]: For 1488/1488 co-relation queries the response was YES. [2023-08-26 11:28:11,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11365 conditions, 4570 events. 2685/4570 cut-off events. For 1488/1488 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 22063 event pairs, 1948 based on Foata normal form. 0/3554 useless extension candidates. Maximal degree in co-relation 11340. Up to 4032 conditions per place. [2023-08-26 11:28:11,787 INFO L140 encePairwiseOnDemand]: 780/792 looper letters, 125 selfloop transitions, 25 changer transitions 3/159 dead transitions. [2023-08-26 11:28:11,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 159 transitions, 1112 flow [2023-08-26 11:28:11,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 11:28:11,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 11:28:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2294 transitions. [2023-08-26 11:28:11,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2633149678604224 [2023-08-26 11:28:11,791 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2294 transitions. [2023-08-26 11:28:11,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2294 transitions. [2023-08-26 11:28:11,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:11,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2294 transitions. [2023-08-26 11:28:11,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 208.54545454545453) internal successors, (2294), 11 states have internal predecessors, (2294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:11,799 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 792.0) internal successors, (9504), 12 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:11,800 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 792.0) internal successors, (9504), 12 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:11,800 INFO L175 Difference]: Start difference. First operand has 125 places, 104 transitions, 606 flow. Second operand 11 states and 2294 transitions. [2023-08-26 11:28:11,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 159 transitions, 1112 flow [2023-08-26 11:28:11,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 159 transitions, 1052 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 11:28:11,811 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 709 flow [2023-08-26 11:28:11,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=709, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2023-08-26 11:28:11,812 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -6 predicate places. [2023-08-26 11:28:11,812 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 709 flow [2023-08-26 11:28:11,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 198.30769230769232) internal successors, (2578), 13 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:11,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:11,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:11,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 11:28:11,813 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:11,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash -176249866, now seen corresponding path program 1 times [2023-08-26 11:28:11,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:11,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014041563] [2023-08-26 11:28:11,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:11,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:12,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:12,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:12,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014041563] [2023-08-26 11:28:12,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014041563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:12,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:12,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-26 11:28:12,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309254107] [2023-08-26 11:28:12,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 11:28:12,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:12,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 11:28:12,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-26 11:28:12,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 792 [2023-08-26 11:28:12,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 709 flow. Second operand has 14 states, 14 states have (on average 193.28571428571428) internal successors, (2706), 14 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:12,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:12,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 792 [2023-08-26 11:28:12,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:13,813 INFO L124 PetriNetUnfolderBase]: 2653/4512 cut-off events. [2023-08-26 11:28:13,813 INFO L125 PetriNetUnfolderBase]: For 1623/1623 co-relation queries the response was YES. [2023-08-26 11:28:13,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11243 conditions, 4512 events. 2653/4512 cut-off events. For 1623/1623 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 21714 event pairs, 807 based on Foata normal form. 22/3658 useless extension candidates. Maximal degree in co-relation 11213. Up to 3013 conditions per place. [2023-08-26 11:28:13,838 INFO L140 encePairwiseOnDemand]: 780/792 looper letters, 132 selfloop transitions, 36 changer transitions 3/177 dead transitions. [2023-08-26 11:28:13,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 177 transitions, 1204 flow [2023-08-26 11:28:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:28:13,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:28:13,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2059 transitions. [2023-08-26 11:28:13,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25997474747474747 [2023-08-26 11:28:13,841 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2059 transitions. [2023-08-26 11:28:13,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2059 transitions. [2023-08-26 11:28:13,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:13,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2059 transitions. [2023-08-26 11:28:13,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 205.9) internal successors, (2059), 10 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:13,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 792.0) internal successors, (8712), 11 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:13,848 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 792.0) internal successors, (8712), 11 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:13,848 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 709 flow. Second operand 10 states and 2059 transitions. [2023-08-26 11:28:13,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 177 transitions, 1204 flow [2023-08-26 11:28:13,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 177 transitions, 1173 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-26 11:28:13,861 INFO L231 Difference]: Finished difference. Result has 138 places, 113 transitions, 777 flow [2023-08-26 11:28:13,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=777, PETRI_PLACES=138, PETRI_TRANSITIONS=113} [2023-08-26 11:28:13,861 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 0 predicate places. [2023-08-26 11:28:13,861 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 113 transitions, 777 flow [2023-08-26 11:28:13,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 193.28571428571428) internal successors, (2706), 14 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:13,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:13,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:13,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 11:28:13,862 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:13,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:13,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1720296833, now seen corresponding path program 1 times [2023-08-26 11:28:13,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:13,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507690904] [2023-08-26 11:28:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:13,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:14,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507690904] [2023-08-26 11:28:14,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507690904] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:14,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:14,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-26 11:28:14,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763088485] [2023-08-26 11:28:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:14,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 11:28:14,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 11:28:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 11:28:14,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 792 [2023-08-26 11:28:14,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 113 transitions, 777 flow. Second operand has 10 states, 10 states have (on average 216.9) internal successors, (2169), 10 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:14,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:14,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 792 [2023-08-26 11:28:14,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:14,760 INFO L124 PetriNetUnfolderBase]: 2434/4173 cut-off events. [2023-08-26 11:28:14,761 INFO L125 PetriNetUnfolderBase]: For 2083/2083 co-relation queries the response was YES. [2023-08-26 11:28:14,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10626 conditions, 4173 events. 2434/4173 cut-off events. For 2083/2083 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 19846 event pairs, 675 based on Foata normal form. 0/3492 useless extension candidates. Maximal degree in co-relation 10594. Up to 2460 conditions per place. [2023-08-26 11:28:14,795 INFO L140 encePairwiseOnDemand]: 784/792 looper letters, 118 selfloop transitions, 15 changer transitions 3/142 dead transitions. [2023-08-26 11:28:14,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 142 transitions, 1076 flow [2023-08-26 11:28:14,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:28:14,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:28:14,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1606 transitions. [2023-08-26 11:28:14,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2896825396825397 [2023-08-26 11:28:14,799 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1606 transitions. [2023-08-26 11:28:14,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1606 transitions. [2023-08-26 11:28:14,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:14,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1606 transitions. [2023-08-26 11:28:14,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 229.42857142857142) internal successors, (1606), 7 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:14,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 792.0) internal successors, (6336), 8 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:14,808 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 792.0) internal successors, (6336), 8 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:14,808 INFO L175 Difference]: Start difference. First operand has 138 places, 113 transitions, 777 flow. Second operand 7 states and 1606 transitions. [2023-08-26 11:28:14,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 142 transitions, 1076 flow [2023-08-26 11:28:14,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 142 transitions, 1010 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-26 11:28:14,822 INFO L231 Difference]: Finished difference. Result has 135 places, 106 transitions, 677 flow [2023-08-26 11:28:14,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=677, PETRI_PLACES=135, PETRI_TRANSITIONS=106} [2023-08-26 11:28:14,823 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, -3 predicate places. [2023-08-26 11:28:14,823 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 106 transitions, 677 flow [2023-08-26 11:28:14,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 216.9) internal successors, (2169), 10 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:14,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:14,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:14,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 11:28:14,824 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:14,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:14,824 INFO L85 PathProgramCache]: Analyzing trace with hash 439769082, now seen corresponding path program 2 times [2023-08-26 11:28:14,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:14,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668242007] [2023-08-26 11:28:14,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:14,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:15,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:15,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668242007] [2023-08-26 11:28:15,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668242007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:15,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:15,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-26 11:28:15,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592074385] [2023-08-26 11:28:15,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:15,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 11:28:15,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 11:28:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-08-26 11:28:15,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 792 [2023-08-26 11:28:15,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 106 transitions, 677 flow. Second operand has 14 states, 14 states have (on average 193.28571428571428) internal successors, (2706), 14 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:15,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:15,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 792 [2023-08-26 11:28:15,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:16,802 INFO L124 PetriNetUnfolderBase]: 2466/4227 cut-off events. [2023-08-26 11:28:16,803 INFO L125 PetriNetUnfolderBase]: For 2155/2155 co-relation queries the response was YES. [2023-08-26 11:28:16,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10682 conditions, 4227 events. 2466/4227 cut-off events. For 2155/2155 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 20329 event pairs, 617 based on Foata normal form. 11/3553 useless extension candidates. Maximal degree in co-relation 10650. Up to 2335 conditions per place. [2023-08-26 11:28:16,823 INFO L140 encePairwiseOnDemand]: 781/792 looper letters, 129 selfloop transitions, 33 changer transitions 3/171 dead transitions. [2023-08-26 11:28:16,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 171 transitions, 1167 flow [2023-08-26 11:28:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:28:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:28:16,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2055 transitions. [2023-08-26 11:28:16,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25946969696969696 [2023-08-26 11:28:16,830 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2055 transitions. [2023-08-26 11:28:16,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2055 transitions. [2023-08-26 11:28:16,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:16,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2055 transitions. [2023-08-26 11:28:16,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 205.5) internal successors, (2055), 10 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:16,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 792.0) internal successors, (8712), 11 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:16,839 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 792.0) internal successors, (8712), 11 states have internal predecessors, (8712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:16,839 INFO L175 Difference]: Start difference. First operand has 135 places, 106 transitions, 677 flow. Second operand 10 states and 2055 transitions. [2023-08-26 11:28:16,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 171 transitions, 1167 flow [2023-08-26 11:28:16,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 171 transitions, 1146 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 11:28:16,854 INFO L231 Difference]: Finished difference. Result has 142 places, 108 transitions, 756 flow [2023-08-26 11:28:16,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=756, PETRI_PLACES=142, PETRI_TRANSITIONS=108} [2023-08-26 11:28:16,855 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 4 predicate places. [2023-08-26 11:28:16,855 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 108 transitions, 756 flow [2023-08-26 11:28:16,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 193.28571428571428) internal successors, (2706), 14 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:16,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:16,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:16,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 11:28:16,856 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:16,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:16,857 INFO L85 PathProgramCache]: Analyzing trace with hash -521084032, now seen corresponding path program 3 times [2023-08-26 11:28:16,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:16,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196664953] [2023-08-26 11:28:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:17,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:17,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196664953] [2023-08-26 11:28:17,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196664953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:17,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:17,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-26 11:28:17,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317712979] [2023-08-26 11:28:17,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:17,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 11:28:17,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:17,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 11:28:17,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-08-26 11:28:17,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 792 [2023-08-26 11:28:17,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 108 transitions, 756 flow. Second operand has 14 states, 14 states have (on average 193.28571428571428) internal successors, (2706), 14 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:17,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:17,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 792 [2023-08-26 11:28:17,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:19,216 INFO L124 PetriNetUnfolderBase]: 2450/4206 cut-off events. [2023-08-26 11:28:19,216 INFO L125 PetriNetUnfolderBase]: For 3065/3065 co-relation queries the response was YES. [2023-08-26 11:28:19,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10964 conditions, 4206 events. 2450/4206 cut-off events. For 3065/3065 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 20174 event pairs, 1441 based on Foata normal form. 11/3532 useless extension candidates. Maximal degree in co-relation 10930. Up to 2843 conditions per place. [2023-08-26 11:28:19,238 INFO L140 encePairwiseOnDemand]: 780/792 looper letters, 130 selfloop transitions, 28 changer transitions 3/167 dead transitions. [2023-08-26 11:28:19,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 167 transitions, 1217 flow [2023-08-26 11:28:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 11:28:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 11:28:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2251 transitions. [2023-08-26 11:28:19,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25837924701561066 [2023-08-26 11:28:19,241 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2251 transitions. [2023-08-26 11:28:19,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2251 transitions. [2023-08-26 11:28:19,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:19,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2251 transitions. [2023-08-26 11:28:19,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 204.63636363636363) internal successors, (2251), 11 states have internal predecessors, (2251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:19,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 792.0) internal successors, (9504), 12 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:19,249 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 792.0) internal successors, (9504), 12 states have internal predecessors, (9504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:19,250 INFO L175 Difference]: Start difference. First operand has 142 places, 108 transitions, 756 flow. Second operand 11 states and 2251 transitions. [2023-08-26 11:28:19,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 167 transitions, 1217 flow [2023-08-26 11:28:19,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 167 transitions, 1150 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-08-26 11:28:19,264 INFO L231 Difference]: Finished difference. Result has 144 places, 108 transitions, 754 flow [2023-08-26 11:28:19,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=754, PETRI_PLACES=144, PETRI_TRANSITIONS=108} [2023-08-26 11:28:19,265 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 6 predicate places. [2023-08-26 11:28:19,265 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 108 transitions, 754 flow [2023-08-26 11:28:19,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 193.28571428571428) internal successors, (2706), 14 states have internal predecessors, (2706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:19,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:19,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:19,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 11:28:19,266 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:19,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1984808586, now seen corresponding path program 1 times [2023-08-26 11:28:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:19,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123313034] [2023-08-26 11:28:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:19,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:19,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:19,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:19,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123313034] [2023-08-26 11:28:19,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123313034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:19,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:19,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:28:19,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164102832] [2023-08-26 11:28:19,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:19,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:28:19,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:19,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:28:19,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:28:19,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 792 [2023-08-26 11:28:19,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 108 transitions, 754 flow. Second operand has 4 states, 4 states have (on average 241.75) internal successors, (967), 4 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:19,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:19,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 792 [2023-08-26 11:28:19,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:19,968 INFO L124 PetriNetUnfolderBase]: 3126/5360 cut-off events. [2023-08-26 11:28:19,968 INFO L125 PetriNetUnfolderBase]: For 3682/3682 co-relation queries the response was YES. [2023-08-26 11:28:19,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13966 conditions, 5360 events. 3126/5360 cut-off events. For 3682/3682 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 27696 event pairs, 1455 based on Foata normal form. 0/4583 useless extension candidates. Maximal degree in co-relation 13933. Up to 4142 conditions per place. [2023-08-26 11:28:19,997 INFO L140 encePairwiseOnDemand]: 787/792 looper letters, 148 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2023-08-26 11:28:19,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 157 transitions, 1290 flow [2023-08-26 11:28:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:28:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:28:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1043 transitions. [2023-08-26 11:28:19,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32922979797979796 [2023-08-26 11:28:19,999 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1043 transitions. [2023-08-26 11:28:19,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1043 transitions. [2023-08-26 11:28:19,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:19,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1043 transitions. [2023-08-26 11:28:20,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 260.75) internal successors, (1043), 4 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 792.0) internal successors, (3960), 5 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 792.0) internal successors, (3960), 5 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,003 INFO L175 Difference]: Start difference. First operand has 144 places, 108 transitions, 754 flow. Second operand 4 states and 1043 transitions. [2023-08-26 11:28:20,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 157 transitions, 1290 flow [2023-08-26 11:28:20,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 157 transitions, 1220 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-26 11:28:20,023 INFO L231 Difference]: Finished difference. Result has 140 places, 109 transitions, 712 flow [2023-08-26 11:28:20,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=696, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=712, PETRI_PLACES=140, PETRI_TRANSITIONS=109} [2023-08-26 11:28:20,028 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 2 predicate places. [2023-08-26 11:28:20,028 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 109 transitions, 712 flow [2023-08-26 11:28:20,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 241.75) internal successors, (967), 4 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:20,029 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:20,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 11:28:20,029 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:20,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:20,029 INFO L85 PathProgramCache]: Analyzing trace with hash 754452333, now seen corresponding path program 1 times [2023-08-26 11:28:20,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:20,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994469916] [2023-08-26 11:28:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:20,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:20,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:20,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:20,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:20,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994469916] [2023-08-26 11:28:20,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994469916] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:20,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:20,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:28:20,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184760315] [2023-08-26 11:28:20,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:20,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:28:20,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:20,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:28:20,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:28:20,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 792 [2023-08-26 11:28:20,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 109 transitions, 712 flow. Second operand has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:20,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 792 [2023-08-26 11:28:20,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:20,414 INFO L124 PetriNetUnfolderBase]: 1952/3487 cut-off events. [2023-08-26 11:28:20,414 INFO L125 PetriNetUnfolderBase]: For 2611/2611 co-relation queries the response was YES. [2023-08-26 11:28:20,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9251 conditions, 3487 events. 1952/3487 cut-off events. For 2611/2611 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 17033 event pairs, 978 based on Foata normal form. 95/3262 useless extension candidates. Maximal degree in co-relation 9217. Up to 1805 conditions per place. [2023-08-26 11:28:20,428 INFO L140 encePairwiseOnDemand]: 788/792 looper letters, 101 selfloop transitions, 2 changer transitions 6/124 dead transitions. [2023-08-26 11:28:20,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 124 transitions, 980 flow [2023-08-26 11:28:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:28:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:28:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1043 transitions. [2023-08-26 11:28:20,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43897306397306396 [2023-08-26 11:28:20,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1043 transitions. [2023-08-26 11:28:20,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1043 transitions. [2023-08-26 11:28:20,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:20,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1043 transitions. [2023-08-26 11:28:20,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 347.6666666666667) internal successors, (1043), 3 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,432 INFO L175 Difference]: Start difference. First operand has 140 places, 109 transitions, 712 flow. Second operand 3 states and 1043 transitions. [2023-08-26 11:28:20,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 124 transitions, 980 flow [2023-08-26 11:28:20,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 124 transitions, 972 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:28:20,442 INFO L231 Difference]: Finished difference. Result has 141 places, 107 transitions, 719 flow [2023-08-26 11:28:20,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=719, PETRI_PLACES=141, PETRI_TRANSITIONS=107} [2023-08-26 11:28:20,442 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 3 predicate places. [2023-08-26 11:28:20,443 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 107 transitions, 719 flow [2023-08-26 11:28:20,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 332.0) internal successors, (996), 3 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:20,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:20,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 11:28:20,443 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:20,443 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash -157576193, now seen corresponding path program 1 times [2023-08-26 11:28:20,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:20,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743626307] [2023-08-26 11:28:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:20,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:20,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:20,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:20,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743626307] [2023-08-26 11:28:20,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743626307] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:20,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:20,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:28:20,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323537612] [2023-08-26 11:28:20,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:20,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:28:20,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:28:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:28:20,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 317 out of 792 [2023-08-26 11:28:20,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 107 transitions, 719 flow. Second operand has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:20,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 317 of 792 [2023-08-26 11:28:20,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:20,799 INFO L124 PetriNetUnfolderBase]: 1018/1927 cut-off events. [2023-08-26 11:28:20,799 INFO L125 PetriNetUnfolderBase]: For 1728/1728 co-relation queries the response was YES. [2023-08-26 11:28:20,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5605 conditions, 1927 events. 1018/1927 cut-off events. For 1728/1728 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 8209 event pairs, 244 based on Foata normal form. 54/1879 useless extension candidates. Maximal degree in co-relation 5570. Up to 1522 conditions per place. [2023-08-26 11:28:20,812 INFO L140 encePairwiseOnDemand]: 786/792 looper letters, 99 selfloop transitions, 6 changer transitions 0/120 dead transitions. [2023-08-26 11:28:20,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 120 transitions, 980 flow [2023-08-26 11:28:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:28:20,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:28:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-26 11:28:20,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42887205387205385 [2023-08-26 11:28:20,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-26 11:28:20,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-26 11:28:20,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:20,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-26 11:28:20,816 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,817 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 792.0) internal successors, (3168), 4 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,817 INFO L175 Difference]: Start difference. First operand has 141 places, 107 transitions, 719 flow. Second operand 3 states and 1019 transitions. [2023-08-26 11:28:20,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 120 transitions, 980 flow [2023-08-26 11:28:20,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 120 transitions, 968 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 11:28:20,828 INFO L231 Difference]: Finished difference. Result has 140 places, 107 transitions, 719 flow [2023-08-26 11:28:20,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=719, PETRI_PLACES=140, PETRI_TRANSITIONS=107} [2023-08-26 11:28:20,829 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 2 predicate places. [2023-08-26 11:28:20,829 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 107 transitions, 719 flow [2023-08-26 11:28:20,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 326.0) internal successors, (978), 3 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:20,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:20,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:20,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 11:28:20,830 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:20,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:20,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1667264484, now seen corresponding path program 1 times [2023-08-26 11:28:20,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:20,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218316680] [2023-08-26 11:28:20,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:20,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:21,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:21,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218316680] [2023-08-26 11:28:21,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218316680] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:21,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:21,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-26 11:28:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605452523] [2023-08-26 11:28:21,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:21,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 11:28:21,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:21,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 11:28:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-26 11:28:21,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 792 [2023-08-26 11:28:21,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 107 transitions, 719 flow. Second operand has 17 states, 17 states have (on average 185.7058823529412) internal successors, (3157), 17 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:21,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:21,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 792 [2023-08-26 11:28:21,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:22,967 INFO L124 PetriNetUnfolderBase]: 1107/2068 cut-off events. [2023-08-26 11:28:22,967 INFO L125 PetriNetUnfolderBase]: For 1808/1808 co-relation queries the response was YES. [2023-08-26 11:28:22,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6067 conditions, 2068 events. 1107/2068 cut-off events. For 1808/1808 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 8775 event pairs, 492 based on Foata normal form. 0/1987 useless extension candidates. Maximal degree in co-relation 6032. Up to 1127 conditions per place. [2023-08-26 11:28:22,978 INFO L140 encePairwiseOnDemand]: 776/792 looper letters, 142 selfloop transitions, 46 changer transitions 18/211 dead transitions. [2023-08-26 11:28:22,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 211 transitions, 1423 flow [2023-08-26 11:28:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 11:28:22,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 11:28:22,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3860 transitions. [2023-08-26 11:28:22,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24368686868686867 [2023-08-26 11:28:22,983 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3860 transitions. [2023-08-26 11:28:22,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3860 transitions. [2023-08-26 11:28:22,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:22,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3860 transitions. [2023-08-26 11:28:22,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 193.0) internal successors, (3860), 20 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:22,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 792.0) internal successors, (16632), 21 states have internal predecessors, (16632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:22,994 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 792.0) internal successors, (16632), 21 states have internal predecessors, (16632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:22,994 INFO L175 Difference]: Start difference. First operand has 140 places, 107 transitions, 719 flow. Second operand 20 states and 3860 transitions. [2023-08-26 11:28:22,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 211 transitions, 1423 flow [2023-08-26 11:28:23,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 211 transitions, 1413 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:28:23,004 INFO L231 Difference]: Finished difference. Result has 163 places, 119 transitions, 898 flow [2023-08-26 11:28:23,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=898, PETRI_PLACES=163, PETRI_TRANSITIONS=119} [2023-08-26 11:28:23,005 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 25 predicate places. [2023-08-26 11:28:23,005 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 119 transitions, 898 flow [2023-08-26 11:28:23,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 185.7058823529412) internal successors, (3157), 17 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:23,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:23,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:23,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 11:28:23,006 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:23,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash -108742024, now seen corresponding path program 2 times [2023-08-26 11:28:23,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:23,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275516983] [2023-08-26 11:28:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:23,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:24,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:24,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275516983] [2023-08-26 11:28:24,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275516983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:24,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:24,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-26 11:28:24,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826634194] [2023-08-26 11:28:24,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:24,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 11:28:24,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:24,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 11:28:24,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-08-26 11:28:24,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 792 [2023-08-26 11:28:24,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 119 transitions, 898 flow. Second operand has 17 states, 17 states have (on average 185.7058823529412) internal successors, (3157), 17 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:24,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:24,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 792 [2023-08-26 11:28:24,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:25,375 INFO L124 PetriNetUnfolderBase]: 1380/2589 cut-off events. [2023-08-26 11:28:25,375 INFO L125 PetriNetUnfolderBase]: For 2375/2375 co-relation queries the response was YES. [2023-08-26 11:28:25,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7662 conditions, 2589 events. 1380/2589 cut-off events. For 2375/2375 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 11950 event pairs, 370 based on Foata normal form. 9/2502 useless extension candidates. Maximal degree in co-relation 7621. Up to 917 conditions per place. [2023-08-26 11:28:25,388 INFO L140 encePairwiseOnDemand]: 773/792 looper letters, 161 selfloop transitions, 55 changer transitions 19/240 dead transitions. [2023-08-26 11:28:25,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 240 transitions, 1694 flow [2023-08-26 11:28:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 11:28:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 11:28:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4066 transitions. [2023-08-26 11:28:25,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24446849446849447 [2023-08-26 11:28:25,393 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4066 transitions. [2023-08-26 11:28:25,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4066 transitions. [2023-08-26 11:28:25,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:25,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4066 transitions. [2023-08-26 11:28:25,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 193.61904761904762) internal successors, (4066), 21 states have internal predecessors, (4066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:25,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 792.0) internal successors, (17424), 22 states have internal predecessors, (17424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:25,408 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 792.0) internal successors, (17424), 22 states have internal predecessors, (17424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:25,408 INFO L175 Difference]: Start difference. First operand has 163 places, 119 transitions, 898 flow. Second operand 21 states and 4066 transitions. [2023-08-26 11:28:25,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 240 transitions, 1694 flow [2023-08-26 11:28:25,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 240 transitions, 1593 flow, removed 11 selfloop flow, removed 13 redundant places. [2023-08-26 11:28:25,423 INFO L231 Difference]: Finished difference. Result has 175 places, 127 transitions, 1002 flow [2023-08-26 11:28:25,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=797, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1002, PETRI_PLACES=175, PETRI_TRANSITIONS=127} [2023-08-26 11:28:25,423 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 37 predicate places. [2023-08-26 11:28:25,424 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 127 transitions, 1002 flow [2023-08-26 11:28:25,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 185.7058823529412) internal successors, (3157), 17 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:25,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:25,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:25,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 11:28:25,424 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:25,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1372647710, now seen corresponding path program 3 times [2023-08-26 11:28:25,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:25,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560865857] [2023-08-26 11:28:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:25,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:26,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:26,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560865857] [2023-08-26 11:28:26,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560865857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:26,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:26,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-08-26 11:28:26,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858587184] [2023-08-26 11:28:26,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:26,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 11:28:26,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 11:28:26,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-26 11:28:26,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 792 [2023-08-26 11:28:26,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 127 transitions, 1002 flow. Second operand has 17 states, 17 states have (on average 185.7058823529412) internal successors, (3157), 17 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:26,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:26,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 792 [2023-08-26 11:28:26,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:27,676 INFO L124 PetriNetUnfolderBase]: 1174/2205 cut-off events. [2023-08-26 11:28:27,676 INFO L125 PetriNetUnfolderBase]: For 3058/3058 co-relation queries the response was YES. [2023-08-26 11:28:27,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7198 conditions, 2205 events. 1174/2205 cut-off events. For 3058/3058 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9624 event pairs, 210 based on Foata normal form. 14/2163 useless extension candidates. Maximal degree in co-relation 7154. Up to 824 conditions per place. [2023-08-26 11:28:27,686 INFO L140 encePairwiseOnDemand]: 777/792 looper letters, 133 selfloop transitions, 46 changer transitions 12/196 dead transitions. [2023-08-26 11:28:27,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 196 transitions, 1564 flow [2023-08-26 11:28:27,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:28:27,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:28:27,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2719 transitions. [2023-08-26 11:28:27,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24522005772005773 [2023-08-26 11:28:27,689 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2719 transitions. [2023-08-26 11:28:27,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2719 transitions. [2023-08-26 11:28:27,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:27,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2719 transitions. [2023-08-26 11:28:27,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 194.21428571428572) internal successors, (2719), 14 states have internal predecessors, (2719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:27,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 792.0) internal successors, (11880), 15 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:27,699 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 792.0) internal successors, (11880), 15 states have internal predecessors, (11880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:27,699 INFO L175 Difference]: Start difference. First operand has 175 places, 127 transitions, 1002 flow. Second operand 14 states and 2719 transitions. [2023-08-26 11:28:27,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 196 transitions, 1564 flow [2023-08-26 11:28:27,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 196 transitions, 1477 flow, removed 6 selfloop flow, removed 16 redundant places. [2023-08-26 11:28:27,715 INFO L231 Difference]: Finished difference. Result has 175 places, 130 transitions, 1063 flow [2023-08-26 11:28:27,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=792, PETRI_DIFFERENCE_MINUEND_FLOW=912, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1063, PETRI_PLACES=175, PETRI_TRANSITIONS=130} [2023-08-26 11:28:27,715 INFO L281 CegarLoopForPetriNet]: 138 programPoint places, 37 predicate places. [2023-08-26 11:28:27,715 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 130 transitions, 1063 flow [2023-08-26 11:28:27,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 185.7058823529412) internal successors, (3157), 17 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:28:27,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:27,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:27,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 11:28:27,716 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:27,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash 988538722, now seen corresponding path program 1 times [2023-08-26 11:28:27,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:27,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391454287] [2023-08-26 11:28:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:27,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-08-26 11:39:41,127 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 11:39:41,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 11:39:41,151 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:152) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:848) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:776) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-08-26 11:39:41,157 INFO L158 Benchmark]: Toolchain (without parser) took 771475.93ms. Allocated memory was 356.5MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 330.1MB in the beginning and 2.3GB in the end (delta: -2.0GB). Peak memory consumption was 7.2GB. Max. memory is 16.0GB. [2023-08-26 11:39:41,158 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory is still 332.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:39:41,158 INFO L158 Benchmark]: CACSL2BoogieTranslator took 587.24ms. Allocated memory is still 356.5MB. Free memory was 330.1MB in the beginning and 300.2MB in the end (delta: 30.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-26 11:39:41,162 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.03ms. Allocated memory is still 356.5MB. Free memory was 300.2MB in the beginning and 296.9MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 11:39:41,162 INFO L158 Benchmark]: Boogie Preprocessor took 33.80ms. Allocated memory is still 356.5MB. Free memory was 296.9MB in the beginning and 294.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:39:41,162 INFO L158 Benchmark]: RCFGBuilder took 773.45ms. Allocated memory is still 356.5MB. Free memory was 294.3MB in the beginning and 260.7MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-08-26 11:39:41,166 INFO L158 Benchmark]: TraceAbstraction took 770024.17ms. Allocated memory was 356.5MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 260.3MB in the beginning and 2.3GB in the end (delta: -2.1GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. [2023-08-26 11:39:41,178 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory is still 332.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 587.24ms. Allocated memory is still 356.5MB. Free memory was 330.1MB in the beginning and 300.2MB in the end (delta: 30.0MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.03ms. Allocated memory is still 356.5MB. Free memory was 300.2MB in the beginning and 296.9MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.80ms. Allocated memory is still 356.5MB. Free memory was 296.9MB in the beginning and 294.3MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 773.45ms. Allocated memory is still 356.5MB. Free memory was 294.3MB in the beginning and 260.7MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * TraceAbstraction took 770024.17ms. Allocated memory was 356.5MB in the beginning and 7.8GB in the end (delta: 7.5GB). Free memory was 260.3MB in the beginning and 2.3GB in the end (delta: -2.1GB). Peak memory consumption was 7.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 258]: Unsoundness Warning unspecified type, defaulting to int C: short [258] - GenericResultAtLocation [Line: 258]: Unsoundness Warning unspecified type, defaulting to int C: short [258] - GenericResultAtLocation [Line: 750]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [750] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 12.1s, 324 PlacesBefore, 138 PlacesAfterwards, 335 TransitionsBefore, 141 TransitionsAfterwards, 30836 CoEnabledTransitionPairs, 8 FixpointIterations, 109 TrivialSequentialCompositions, 300 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 23 ConcurrentYvCompositions, 8 ChoiceCompositions, 446 TotalNumberOfCompositions, 110142 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 44587, independent: 43353, independent conditional: 0, independent unconditional: 43353, dependent: 1234, dependent conditional: 0, dependent unconditional: 1234, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 19324, independent: 19170, independent conditional: 0, independent unconditional: 19170, dependent: 154, dependent conditional: 0, dependent unconditional: 154, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 44587, independent: 24183, independent conditional: 0, independent unconditional: 24183, dependent: 1080, dependent conditional: 0, dependent unconditional: 1080, unknown: 19324, unknown conditional: 0, unknown unconditional: 19324] , Statistics on independence cache: Total cache size (in pairs): 1076, Positive cache size: 987, Positive conditional cache size: 0, Positive unconditional cache size: 987, Negative cache size: 89, Negative conditional cache size: 0, Negative unconditional cache size: 89, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown [2023-08-26 11:39:41,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0