/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 --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -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.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 14:08:03,802 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 14:08:03,887 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 14:08:03,891 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 14:08:03,892 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 14:08:03,923 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 14:08:03,923 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 14:08:03,924 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 14:08:03,924 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 14:08:03,926 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 14:08:03,926 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 14:08:03,926 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 14:08:03,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 14:08:03,927 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 14:08:03,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 14:08:03,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 14:08:03,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 14:08:03,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 14:08:03,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 14:08:03,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 14:08:03,929 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 14:08:03,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 14:08:03,929 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 14:08:03,930 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 14:08:03,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 14:08:03,930 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 14:08:03,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 14:08:03,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:08:03,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 14:08:03,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 14:08:03,932 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 14:08:03,932 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 14:08:03,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 14:08:03,932 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 14:08:03,932 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 14:08:03,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 14:08:04,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 14:08:04,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 14:08:04,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 14:08:04,260 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 14:08:04,261 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 14:08:04,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue.i [2023-08-26 14:08:05,561 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 14:08:05,869 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 14:08:05,870 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i [2023-08-26 14:08:05,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e719ec889/7000957900144f5b9df60e8f94f119ef/FLAGb42d73a3d [2023-08-26 14:08:05,905 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e719ec889/7000957900144f5b9df60e8f94f119ef [2023-08-26 14:08:05,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 14:08:05,908 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 14:08:05,909 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 14:08:05,909 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 14:08:05,911 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 14:08:05,912 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,913 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57dd0374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:05, skipping insertion in model container [2023-08-26 14:08:05,913 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:08:05" (1/1) ... [2023-08-26 14:08:05,959 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 14:08:06,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:08:06,463 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 14:08:06,492 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-26 14:08:06,493 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-26 14:08:06,499 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [750] [2023-08-26 14:08:06,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:08:06,606 INFO L206 MainTranslator]: Completed translation [2023-08-26 14:08:06,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06 WrapperNode [2023-08-26 14:08:06,607 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 14:08:06,608 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 14:08:06,608 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 14:08:06,608 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 14:08:06,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,649 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,691 INFO L138 Inliner]: procedures = 274, calls = 71, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 261 [2023-08-26 14:08:06,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 14:08:06,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 14:08:06,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 14:08:06,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 14:08:06,701 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,701 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,718 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,727 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,747 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,748 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,753 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 14:08:06,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 14:08:06,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 14:08:06,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 14:08:06,754 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (1/1) ... [2023-08-26 14:08:06,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:08:06,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:08:06,794 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 14:08:06,819 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 14:08:06,834 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 14:08:06,835 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 14:08:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 14:08:06,835 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 14:08:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 14:08:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 14:08:06,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 14:08:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 14:08:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 14:08:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 14:08:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 14:08:06,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 14:08:06,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 14:08:06,838 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 14:08:07,021 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 14:08:07,023 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 14:08:07,487 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 14:08:07,496 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 14:08:07,497 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 14:08:07,499 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:08:07 BoogieIcfgContainer [2023-08-26 14:08:07,499 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 14:08:07,501 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 14:08:07,501 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 14:08:07,504 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 14:08:07,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:08:05" (1/3) ... [2023-08-26 14:08:07,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1370f360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:08:07, skipping insertion in model container [2023-08-26 14:08:07,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:08:06" (2/3) ... [2023-08-26 14:08:07,505 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1370f360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:08:07, skipping insertion in model container [2023-08-26 14:08:07,505 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:08:07" (3/3) ... [2023-08-26 14:08:07,506 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-08-26 14:08:07,520 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 14:08:07,520 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 79 error locations. [2023-08-26 14:08:07,520 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 14:08:07,635 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 14:08:07,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 343 places, 354 transitions, 724 flow [2023-08-26 14:08:07,825 INFO L124 PetriNetUnfolderBase]: 18/352 cut-off events. [2023-08-26 14:08:07,826 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 14:08:07,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 352 events. 18/352 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 785 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 255. Up to 2 conditions per place. [2023-08-26 14:08:07,838 INFO L82 GeneralOperation]: Start removeDead. Operand has 343 places, 354 transitions, 724 flow [2023-08-26 14:08:07,849 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 343 transitions, 695 flow [2023-08-26 14:08:07,852 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 14:08:07,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 343 transitions, 695 flow [2023-08-26 14:08:07,862 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 343 transitions, 695 flow [2023-08-26 14:08:07,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 343 transitions, 695 flow [2023-08-26 14:08:07,941 INFO L124 PetriNetUnfolderBase]: 18/343 cut-off events. [2023-08-26 14:08:07,942 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:08:07,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 343 events. 18/343 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 748 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 255. Up to 2 conditions per place. [2023-08-26 14:08:07,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 30836 [2023-08-26 14:08:21,723 INFO L134 LiptonReduction]: Checked pairs total: 108870 [2023-08-26 14:08:21,723 INFO L136 LiptonReduction]: Total number of compositions: 429 [2023-08-26 14:08:21,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 14:08:21,740 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;@6baee66a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 14:08:21,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 141 error locations. [2023-08-26 14:08:21,741 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 14:08:21,741 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 14:08:21,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:08:21,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:21,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 14:08:21,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:08:21,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:21,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1480, now seen corresponding path program 1 times [2023-08-26 14:08:21,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:21,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304479266] [2023-08-26 14:08:21,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:21,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:21,853 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 14:08:21,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:21,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304479266] [2023-08-26 14:08:21,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304479266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:21,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:21,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 14:08:21,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895189714] [2023-08-26 14:08:21,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:21,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 14:08:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:21,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 14:08:21,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 14:08:21,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 783 [2023-08-26 14:08:21,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 144 transitions, 297 flow. Second operand has 2 states, 2 states have (on average 338.5) internal successors, (677), 2 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:21,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:21,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 783 [2023-08-26 14:08:21,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:23,009 INFO L124 PetriNetUnfolderBase]: 7769/12595 cut-off events. [2023-08-26 14:08:23,010 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-08-26 14:08:23,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24493 conditions, 12595 events. 7769/12595 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 75678 event pairs, 6769 based on Foata normal form. 180/7030 useless extension candidates. Maximal degree in co-relation 24093. Up to 11783 conditions per place. [2023-08-26 14:08:23,096 INFO L140 encePairwiseOnDemand]: 734/783 looper letters, 83 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-08-26 14:08:23,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 361 flow [2023-08-26 14:08:23,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 14:08:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 14:08:23,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 808 transitions. [2023-08-26 14:08:23,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159642401021711 [2023-08-26 14:08:23,113 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 808 transitions. [2023-08-26 14:08:23,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 808 transitions. [2023-08-26 14:08:23,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:23,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 808 transitions. [2023-08-26 14:08:23,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 404.0) internal successors, (808), 2 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:23,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 783.0) internal successors, (2349), 3 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:23,133 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 783.0) internal successors, (2349), 3 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:23,135 INFO L175 Difference]: Start difference. First operand has 140 places, 144 transitions, 297 flow. Second operand 2 states and 808 transitions. [2023-08-26 14:08:23,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 361 flow [2023-08-26 14:08:23,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 14:08:23,149 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 190 flow [2023-08-26 14:08:23,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-08-26 14:08:23,155 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -50 predicate places. [2023-08-26 14:08:23,155 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 190 flow [2023-08-26 14:08:23,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 338.5) internal successors, (677), 2 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:23,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:23,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:08:23,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 14:08:23,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:08:23,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:23,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1460123, now seen corresponding path program 1 times [2023-08-26 14:08:23,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:23,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732468170] [2023-08-26 14:08:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:23,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:23,435 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 14:08:23,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:23,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732468170] [2023-08-26 14:08:23,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732468170] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:23,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:23,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:23,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129914615] [2023-08-26 14:08:23,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:23,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:23,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:23,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:23,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:23,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 783 [2023-08-26 14:08:23,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:23,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:23,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 783 [2023-08-26 14:08:23,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:24,439 INFO L124 PetriNetUnfolderBase]: 8368/13322 cut-off events. [2023-08-26 14:08:24,439 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:08:24,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26099 conditions, 13322 events. 8368/13322 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 77865 event pairs, 7332 based on Foata normal form. 0/7053 useless extension candidates. Maximal degree in co-relation 26096. Up to 12681 conditions per place. [2023-08-26 14:08:24,500 INFO L140 encePairwiseOnDemand]: 780/783 looper letters, 83 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-08-26 14:08:24,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 354 flow [2023-08-26 14:08:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:24,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 830 transitions. [2023-08-26 14:08:24,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35334184759472115 [2023-08-26 14:08:24,504 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 830 transitions. [2023-08-26 14:08:24,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 830 transitions. [2023-08-26 14:08:24,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:24,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 830 transitions. [2023-08-26 14:08:24,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:24,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:24,515 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:24,515 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 190 flow. Second operand 3 states and 830 transitions. [2023-08-26 14:08:24,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 354 flow [2023-08-26 14:08:24,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 14:08:24,518 INFO L231 Difference]: Finished difference. Result has 90 places, 91 transitions, 188 flow [2023-08-26 14:08:24,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=90, PETRI_TRANSITIONS=91} [2023-08-26 14:08:24,520 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -50 predicate places. [2023-08-26 14:08:24,522 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 91 transitions, 188 flow [2023-08-26 14:08:24,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:24,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:24,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:08:24,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 14:08:24,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:08:24,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1460122, now seen corresponding path program 1 times [2023-08-26 14:08:24,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:24,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681754893] [2023-08-26 14:08:24,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:24,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:24,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:24,676 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 14:08:24,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:24,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681754893] [2023-08-26 14:08:24,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681754893] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:24,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:24,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:24,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569080562] [2023-08-26 14:08:24,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:24,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:24,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:24,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:24,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:24,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 783 [2023-08-26 14:08:24,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 91 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:24,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:24,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 783 [2023-08-26 14:08:24,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:25,701 INFO L124 PetriNetUnfolderBase]: 8293/13176 cut-off events. [2023-08-26 14:08:25,702 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:08:25,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25812 conditions, 13176 events. 8293/13176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 76641 event pairs, 7265 based on Foata normal form. 0/7009 useless extension candidates. Maximal degree in co-relation 25808. Up to 12538 conditions per place. [2023-08-26 14:08:25,760 INFO L140 encePairwiseOnDemand]: 780/783 looper letters, 81 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-08-26 14:08:25,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 348 flow [2023-08-26 14:08:25,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 834 transitions. [2023-08-26 14:08:25,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3550446998722861 [2023-08-26 14:08:25,764 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 834 transitions. [2023-08-26 14:08:25,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 834 transitions. [2023-08-26 14:08:25,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:25,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 834 transitions. [2023-08-26 14:08:25,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:25,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:25,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:25,859 INFO L175 Difference]: Start difference. First operand has 90 places, 91 transitions, 188 flow. Second operand 3 states and 834 transitions. [2023-08-26 14:08:25,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 348 flow [2023-08-26 14:08:25,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:25,863 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 185 flow [2023-08-26 14:08:25,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2023-08-26 14:08:25,864 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -51 predicate places. [2023-08-26 14:08:25,864 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 185 flow [2023-08-26 14:08:25,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:25,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:25,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:08:25,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 14:08:25,865 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 14:08:25,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:25,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1460183, now seen corresponding path program 1 times [2023-08-26 14:08:25,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:25,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119750321] [2023-08-26 14:08:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:25,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:26,146 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 14:08:26,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:26,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119750321] [2023-08-26 14:08:26,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119750321] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:26,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:26,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:26,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878326083] [2023-08-26 14:08:26,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:26,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:26,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 783 [2023-08-26 14:08:26,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:26,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:26,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 783 [2023-08-26 14:08:26,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:26,962 INFO L124 PetriNetUnfolderBase]: 7297/11590 cut-off events. [2023-08-26 14:08:26,962 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:08:26,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22685 conditions, 11590 events. 7297/11590 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 65947 event pairs, 6337 based on Foata normal form. 0/6477 useless extension candidates. Maximal degree in co-relation 22681. Up to 11004 conditions per place. [2023-08-26 14:08:27,009 INFO L140 encePairwiseOnDemand]: 777/783 looper letters, 76 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-26 14:08:27,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 329 flow [2023-08-26 14:08:27,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:27,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:27,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 823 transitions. [2023-08-26 14:08:27,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3503618561089826 [2023-08-26 14:08:27,013 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 823 transitions. [2023-08-26 14:08:27,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 823 transitions. [2023-08-26 14:08:27,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:27,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 823 transitions. [2023-08-26 14:08:27,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:27,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:27,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:27,020 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 185 flow. Second operand 3 states and 823 transitions. [2023-08-26 14:08:27,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 329 flow [2023-08-26 14:08:27,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:27,023 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 176 flow [2023-08-26 14:08:27,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, 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 14:08:27,024 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -55 predicate places. [2023-08-26 14:08:27,025 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 176 flow [2023-08-26 14:08:27,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:27,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:27,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:08:27,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 14:08:27,026 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 14:08:27,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:27,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1460182, now seen corresponding path program 1 times [2023-08-26 14:08:27,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:27,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735378739] [2023-08-26 14:08:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:27,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:27,157 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 14:08:27,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:27,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735378739] [2023-08-26 14:08:27,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735378739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:27,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:27,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:27,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434330727] [2023-08-26 14:08:27,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:27,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:27,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:27,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:27,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:27,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 783 [2023-08-26 14:08:27,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:27,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:27,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 783 [2023-08-26 14:08:27,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:27,955 INFO L124 PetriNetUnfolderBase]: 6514/10347 cut-off events. [2023-08-26 14:08:27,955 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:08:27,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20234 conditions, 10347 events. 6514/10347 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 57631 event pairs, 5610 based on Foata normal form. 0/6048 useless extension candidates. Maximal degree in co-relation 20230. Up to 9801 conditions per place. [2023-08-26 14:08:28,007 INFO L140 encePairwiseOnDemand]: 778/783 looper letters, 72 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-26 14:08:28,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 314 flow [2023-08-26 14:08:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:28,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 809 transitions. [2023-08-26 14:08:28,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444018731375053 [2023-08-26 14:08:28,011 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 809 transitions. [2023-08-26 14:08:28,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 809 transitions. [2023-08-26 14:08:28,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:28,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 809 transitions. [2023-08-26 14:08:28,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:28,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:28,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:28,020 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 176 flow. Second operand 3 states and 809 transitions. [2023-08-26 14:08:28,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 314 flow [2023-08-26 14:08:28,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:28,022 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 169 flow [2023-08-26 14:08:28,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, 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 14:08:28,023 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -58 predicate places. [2023-08-26 14:08:28,023 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 169 flow [2023-08-26 14:08:28,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:28,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:28,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 14:08:28,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 14:08:28,024 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 14:08:28,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:28,024 INFO L85 PathProgramCache]: Analyzing trace with hash 45264269, now seen corresponding path program 1 times [2023-08-26 14:08:28,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:28,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224225257] [2023-08-26 14:08:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:28,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:28,602 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 14:08:28,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:28,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224225257] [2023-08-26 14:08:28,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224225257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:28,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:28,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:28,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687788240] [2023-08-26 14:08:28,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:28,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:28,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:28,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:28,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:28,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 783 [2023-08-26 14:08:28,610 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 14:08:28,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:28,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 783 [2023-08-26 14:08:28,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:29,306 INFO L124 PetriNetUnfolderBase]: 6222/9968 cut-off events. [2023-08-26 14:08:29,306 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:08:29,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 9968 events. 6222/9968 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 56122 event pairs, 5141 based on Foata normal form. 0/5890 useless extension candidates. Maximal degree in co-relation 19405. Up to 9351 conditions per place. [2023-08-26 14:08:29,352 INFO L140 encePairwiseOnDemand]: 778/783 looper letters, 73 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-26 14:08:29,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 333 flow [2023-08-26 14:08:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-26 14:08:29,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38569604086845466 [2023-08-26 14:08:29,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-26 14:08:29,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-26 14:08:29,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:29,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-26 14:08:29,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:29,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:29,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:29,364 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 169 flow. Second operand 3 states and 906 transitions. [2023-08-26 14:08:29,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 333 flow [2023-08-26 14:08:29,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:29,366 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 194 flow [2023-08-26 14:08:29,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, 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 14:08:29,367 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -56 predicate places. [2023-08-26 14:08:29,367 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 194 flow [2023-08-26 14:08:29,367 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 14:08:29,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:29,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:08:29,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 14:08:29,368 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 14:08:29,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1403192733, now seen corresponding path program 1 times [2023-08-26 14:08:29,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:29,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371743087] [2023-08-26 14:08:29,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:29,665 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 14:08:29,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:29,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371743087] [2023-08-26 14:08:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371743087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:29,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:29,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:08:29,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472703160] [2023-08-26 14:08:29,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:29,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:08:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:08:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:08:29,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 783 [2023-08-26 14:08:29,669 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 14:08:29,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:29,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 783 [2023-08-26 14:08:29,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:30,294 INFO L124 PetriNetUnfolderBase]: 6767/10742 cut-off events. [2023-08-26 14:08:30,294 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2023-08-26 14:08:30,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21380 conditions, 10742 events. 6767/10742 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 61142 event pairs, 1596 based on Foata normal form. 45/6432 useless extension candidates. Maximal degree in co-relation 21375. Up to 9846 conditions per place. [2023-08-26 14:08:30,348 INFO L140 encePairwiseOnDemand]: 778/783 looper letters, 90 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2023-08-26 14:08:30,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 432 flow [2023-08-26 14:08:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:30,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:30,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-26 14:08:30,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32907620263942106 [2023-08-26 14:08:30,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-26 14:08:30,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-26 14:08:30,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:30,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-26 14:08:30,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:30,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:30,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:30,358 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 194 flow. Second operand 3 states and 773 transitions. [2023-08-26 14:08:30,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 432 flow [2023-08-26 14:08:30,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:30,360 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 226 flow [2023-08-26 14:08:30,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, 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 14:08:30,361 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -54 predicate places. [2023-08-26 14:08:30,361 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 226 flow [2023-08-26 14:08:30,362 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 14:08:30,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:30,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:08:30,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 14:08:30,362 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:08:30,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:30,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1403209311, now seen corresponding path program 1 times [2023-08-26 14:08:30,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:30,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352752128] [2023-08-26 14:08:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:30,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:30,411 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 14:08:30,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:30,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352752128] [2023-08-26 14:08:30,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352752128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:30,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:30,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:08:30,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129702593] [2023-08-26 14:08:30,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:30,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:08:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:30,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:08:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:08:30,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 783 [2023-08-26 14:08:30,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 246.25) internal successors, (985), 4 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:30,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:30,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 783 [2023-08-26 14:08:30,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:30,922 INFO L124 PetriNetUnfolderBase]: 4896/7908 cut-off events. [2023-08-26 14:08:30,922 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-08-26 14:08:30,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16218 conditions, 7908 events. 4896/7908 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 43225 event pairs, 4050 based on Foata normal form. 0/5179 useless extension candidates. Maximal degree in co-relation 16212. Up to 7476 conditions per place. [2023-08-26 14:08:30,960 INFO L140 encePairwiseOnDemand]: 781/783 looper letters, 77 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-08-26 14:08:30,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 380 flow [2023-08-26 14:08:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 808 transitions. [2023-08-26 14:08:30,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439761600681141 [2023-08-26 14:08:30,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 808 transitions. [2023-08-26 14:08:30,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 808 transitions. [2023-08-26 14:08:30,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:30,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 808 transitions. [2023-08-26 14:08:30,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:30,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:30,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:30,970 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 226 flow. Second operand 3 states and 808 transitions. [2023-08-26 14:08:30,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 380 flow [2023-08-26 14:08:30,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 85 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:30,973 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 220 flow [2023-08-26 14:08:30,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, 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 14:08:30,973 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -54 predicate places. [2023-08-26 14:08:30,973 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 220 flow [2023-08-26 14:08:30,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.25) internal successors, (985), 4 states have internal predecessors, (985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:30,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:30,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:08:30,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 14:08:30,974 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:08:30,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1403209312, now seen corresponding path program 1 times [2023-08-26 14:08:30,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:30,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701139051] [2023-08-26 14:08:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:30,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:31,005 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 14:08:31,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701139051] [2023-08-26 14:08:31,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701139051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:31,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:31,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049274534] [2023-08-26 14:08:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:31,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:31,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:31,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 783 [2023-08-26 14:08:31,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:31,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:31,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 783 [2023-08-26 14:08:31,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:31,442 INFO L124 PetriNetUnfolderBase]: 3025/5074 cut-off events. [2023-08-26 14:08:31,442 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2023-08-26 14:08:31,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10408 conditions, 5074 events. 3025/5074 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 26876 event pairs, 2444 based on Foata normal form. 0/3805 useless extension candidates. Maximal degree in co-relation 10402. Up to 4784 conditions per place. [2023-08-26 14:08:31,461 INFO L140 encePairwiseOnDemand]: 781/783 looper letters, 76 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-26 14:08:31,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 372 flow [2023-08-26 14:08:31,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:31,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2023-08-26 14:08:31,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3499361430395913 [2023-08-26 14:08:31,465 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2023-08-26 14:08:31,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2023-08-26 14:08:31,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:31,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2023-08-26 14:08:31,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:31,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:31,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:31,472 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 220 flow. Second operand 3 states and 822 transitions. [2023-08-26 14:08:31,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 372 flow [2023-08-26 14:08:31,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:31,474 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 219 flow [2023-08-26 14:08:31,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, 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 14:08:31,476 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -54 predicate places. [2023-08-26 14:08:31,476 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 219 flow [2023-08-26 14:08:31,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:31,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:31,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:08:31,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 14:08:31,478 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 14:08:31,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1403193547, now seen corresponding path program 1 times [2023-08-26 14:08:31,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:31,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975307513] [2023-08-26 14:08:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:31,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:31,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:31,641 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 14:08:31,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:31,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975307513] [2023-08-26 14:08:31,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975307513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:31,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:31,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:08:31,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557256978] [2023-08-26 14:08:31,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:08:31,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:31,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:08:31,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:08:31,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 783 [2023-08-26 14:08:31,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:31,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:31,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 783 [2023-08-26 14:08:31,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:32,232 INFO L124 PetriNetUnfolderBase]: 3124/5323 cut-off events. [2023-08-26 14:08:32,232 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-08-26 14:08:32,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10772 conditions, 5323 events. 3124/5323 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 28639 event pairs, 1583 based on Foata normal form. 0/4040 useless extension candidates. Maximal degree in co-relation 10766. Up to 2539 conditions per place. [2023-08-26 14:08:32,254 INFO L140 encePairwiseOnDemand]: 777/783 looper letters, 103 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-08-26 14:08:32,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 114 transitions, 492 flow [2023-08-26 14:08:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 14:08:32,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 14:08:32,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1011 transitions. [2023-08-26 14:08:32,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227969348659004 [2023-08-26 14:08:32,258 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1011 transitions. [2023-08-26 14:08:32,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1011 transitions. [2023-08-26 14:08:32,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:32,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1011 transitions. [2023-08-26 14:08:32,261 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 252.75) internal successors, (1011), 4 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 783.0) internal successors, (3915), 5 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,266 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 783.0) internal successors, (3915), 5 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,266 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 219 flow. Second operand 4 states and 1011 transitions. [2023-08-26 14:08:32,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 114 transitions, 492 flow [2023-08-26 14:08:32,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:32,270 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 213 flow [2023-08-26 14:08:32,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, 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=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2023-08-26 14:08:32,272 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -53 predicate places. [2023-08-26 14:08:32,272 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 213 flow [2023-08-26 14:08:32,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:32,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:32,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 14:08:32,273 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 14:08:32,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash 92194191, now seen corresponding path program 1 times [2023-08-26 14:08:32,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:32,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563567681] [2023-08-26 14:08:32,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:32,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:32,347 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 14:08:32,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:32,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563567681] [2023-08-26 14:08:32,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563567681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:32,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:32,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:08:32,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860321123] [2023-08-26 14:08:32,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:32,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:32,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:32,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:32,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:32,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 783 [2023-08-26 14:08:32,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:32,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 783 [2023-08-26 14:08:32,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:32,769 INFO L124 PetriNetUnfolderBase]: 2135/3653 cut-off events. [2023-08-26 14:08:32,769 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-08-26 14:08:32,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7425 conditions, 3653 events. 2135/3653 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 16968 event pairs, 1079 based on Foata normal form. 0/2855 useless extension candidates. Maximal degree in co-relation 7418. Up to 2187 conditions per place. [2023-08-26 14:08:32,786 INFO L140 encePairwiseOnDemand]: 779/783 looper letters, 93 selfloop transitions, 3 changer transitions 3/108 dead transitions. [2023-08-26 14:08:32,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 108 transitions, 459 flow [2023-08-26 14:08:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:32,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2023-08-26 14:08:32,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46573009791400594 [2023-08-26 14:08:32,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2023-08-26 14:08:32,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2023-08-26 14:08:32,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:32,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2023-08-26 14:08:32,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,811 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 213 flow. Second operand 3 states and 1094 transitions. [2023-08-26 14:08:32,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 108 transitions, 459 flow [2023-08-26 14:08:32,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 108 transitions, 447 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 14:08:32,814 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 197 flow [2023-08-26 14:08:32,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-26 14:08:32,815 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -55 predicate places. [2023-08-26 14:08:32,815 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 197 flow [2023-08-26 14:08:32,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:32,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:32,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 14:08:32,816 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 14:08:32,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash -858617101, now seen corresponding path program 1 times [2023-08-26 14:08:32,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:32,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004911572] [2023-08-26 14:08:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:32,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:32,913 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 14:08:32,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:32,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004911572] [2023-08-26 14:08:32,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004911572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:32,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:32,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:08:32,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303930293] [2023-08-26 14:08:32,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:32,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:32,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:32,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 783 [2023-08-26 14:08:32,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:32,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:32,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 783 [2023-08-26 14:08:32,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:33,285 INFO L124 PetriNetUnfolderBase]: 1962/3349 cut-off events. [2023-08-26 14:08:33,285 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-26 14:08:33,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6891 conditions, 3349 events. 1962/3349 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14979 event pairs, 1538 based on Foata normal form. 0/2581 useless extension candidates. Maximal degree in co-relation 6884. Up to 3177 conditions per place. [2023-08-26 14:08:33,299 INFO L140 encePairwiseOnDemand]: 779/783 looper letters, 68 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-26 14:08:33,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 76 transitions, 329 flow [2023-08-26 14:08:33,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:33,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 810 transitions. [2023-08-26 14:08:33,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2023-08-26 14:08:33,302 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 810 transitions. [2023-08-26 14:08:33,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 810 transitions. [2023-08-26 14:08:33,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:33,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 810 transitions. [2023-08-26 14:08:33,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:33,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:33,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:33,308 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 197 flow. Second operand 3 states and 810 transitions. [2023-08-26 14:08:33,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 76 transitions, 329 flow [2023-08-26 14:08:33,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:33,310 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 190 flow [2023-08-26 14:08:33,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2023-08-26 14:08:33,311 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -57 predicate places. [2023-08-26 14:08:33,311 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 190 flow [2023-08-26 14:08:33,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:33,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:33,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:33,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 14:08:33,312 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 14:08:33,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash -858617099, now seen corresponding path program 1 times [2023-08-26 14:08:33,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:33,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151935306] [2023-08-26 14:08:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:33,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:33,874 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 14:08:33,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:33,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151935306] [2023-08-26 14:08:33,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151935306] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:33,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:33,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 14:08:33,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716122058] [2023-08-26 14:08:33,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:33,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 14:08:33,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:33,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 14:08:33,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 14:08:33,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 783 [2023-08-26 14:08:33,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 190 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 14:08:33,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:33,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 783 [2023-08-26 14:08:33,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:34,470 INFO L124 PetriNetUnfolderBase]: 2302/3968 cut-off events. [2023-08-26 14:08:34,470 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-08-26 14:08:34,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8103 conditions, 3968 events. 2302/3968 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 19156 event pairs, 1320 based on Foata normal form. 0/3103 useless extension candidates. Maximal degree in co-relation 8096. Up to 3080 conditions per place. [2023-08-26 14:08:34,480 INFO L140 encePairwiseOnDemand]: 766/783 looper letters, 90 selfloop transitions, 19 changer transitions 0/117 dead transitions. [2023-08-26 14:08:34,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 117 transitions, 504 flow [2023-08-26 14:08:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 14:08:34,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 14:08:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1537 transitions. [2023-08-26 14:08:34,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271604938271605 [2023-08-26 14:08:34,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1537 transitions. [2023-08-26 14:08:34,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1537 transitions. [2023-08-26 14:08:34,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:34,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1537 transitions. [2023-08-26 14:08:34,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:34,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:34,494 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:34,494 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 190 flow. Second operand 6 states and 1537 transitions. [2023-08-26 14:08:34,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 117 transitions, 504 flow [2023-08-26 14:08:34,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:34,497 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 320 flow [2023-08-26 14:08:34,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-08-26 14:08:34,497 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -49 predicate places. [2023-08-26 14:08:34,497 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 320 flow [2023-08-26 14:08:34,498 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 14:08:34,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:34,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:34,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 14:08:34,498 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 14:08:34,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash 478451461, now seen corresponding path program 1 times [2023-08-26 14:08:34,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:34,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958980834] [2023-08-26 14:08:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:34,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:34,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:08:34,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:34,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958980834] [2023-08-26 14:08:34,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958980834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:34,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:34,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:08:34,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533100614] [2023-08-26 14:08:34,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:34,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:08:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:34,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:08:34,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:08:34,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 783 [2023-08-26 14:08:34,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 247.75) internal successors, (991), 4 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:34,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:34,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 783 [2023-08-26 14:08:34,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:35,007 INFO L124 PetriNetUnfolderBase]: 2345/4008 cut-off events. [2023-08-26 14:08:35,007 INFO L125 PetriNetUnfolderBase]: For 815/815 co-relation queries the response was YES. [2023-08-26 14:08:35,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9129 conditions, 4008 events. 2345/4008 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 18879 event pairs, 1782 based on Foata normal form. 0/3296 useless extension candidates. Maximal degree in co-relation 9119. Up to 3808 conditions per place. [2023-08-26 14:08:35,029 INFO L140 encePairwiseOnDemand]: 781/783 looper letters, 80 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-26 14:08:35,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 480 flow [2023-08-26 14:08:35,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:35,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 801 transitions. [2023-08-26 14:08:35,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34099616858237547 [2023-08-26 14:08:35,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 801 transitions. [2023-08-26 14:08:35,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 801 transitions. [2023-08-26 14:08:35,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:35,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 801 transitions. [2023-08-26 14:08:35,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,037 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 320 flow. Second operand 3 states and 801 transitions. [2023-08-26 14:08:35,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 480 flow [2023-08-26 14:08:35,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 88 transitions, 472 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:35,041 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 312 flow [2023-08-26 14:08:35,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=89, 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=312, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2023-08-26 14:08:35,042 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -49 predicate places. [2023-08-26 14:08:35,042 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 312 flow [2023-08-26 14:08:35,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 247.75) internal successors, (991), 4 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:35,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:35,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 14:08:35,043 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:08:35,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash -191198982, now seen corresponding path program 1 times [2023-08-26 14:08:35,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:35,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803180248] [2023-08-26 14:08:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:35,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:35,096 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 14:08:35,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:35,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803180248] [2023-08-26 14:08:35,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803180248] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:35,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:35,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:08:35,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606991733] [2023-08-26 14:08:35,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:35,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:08:35,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:35,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:08:35,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:08:35,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 783 [2023-08-26 14:08:35,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:35,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 783 [2023-08-26 14:08:35,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:35,433 INFO L124 PetriNetUnfolderBase]: 2143/3745 cut-off events. [2023-08-26 14:08:35,434 INFO L125 PetriNetUnfolderBase]: For 743/743 co-relation queries the response was YES. [2023-08-26 14:08:35,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8471 conditions, 3745 events. 2143/3745 cut-off events. For 743/743 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 18071 event pairs, 1594 based on Foata normal form. 19/3182 useless extension candidates. Maximal degree in co-relation 8460. Up to 3424 conditions per place. [2023-08-26 14:08:35,448 INFO L140 encePairwiseOnDemand]: 779/783 looper letters, 78 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-26 14:08:35,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 94 transitions, 496 flow [2023-08-26 14:08:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:08:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:08:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1065 transitions. [2023-08-26 14:08:35,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45338441890166026 [2023-08-26 14:08:35,451 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1065 transitions. [2023-08-26 14:08:35,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1065 transitions. [2023-08-26 14:08:35,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:35,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1065 transitions. [2023-08-26 14:08:35,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,457 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 312 flow. Second operand 3 states and 1065 transitions. [2023-08-26 14:08:35,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 94 transitions, 496 flow [2023-08-26 14:08:35,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 94 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:08:35,460 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 319 flow [2023-08-26 14:08:35,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2023-08-26 14:08:35,461 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -48 predicate places. [2023-08-26 14:08:35,461 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 319 flow [2023-08-26 14:08:35,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:35,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:35,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:35,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 14:08:35,462 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:08:35,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 941677958, now seen corresponding path program 1 times [2023-08-26 14:08:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:35,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474739118] [2023-08-26 14:08:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:35,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:36,022 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 14:08:36,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:36,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474739118] [2023-08-26 14:08:36,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474739118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:36,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:36,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 14:08:36,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145886339] [2023-08-26 14:08:36,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:36,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 14:08:36,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:36,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 14:08:36,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 14:08:36,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 783 [2023-08-26 14:08:36,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 319 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 14:08:36,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:36,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 783 [2023-08-26 14:08:36,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:36,683 INFO L124 PetriNetUnfolderBase]: 2474/4243 cut-off events. [2023-08-26 14:08:36,683 INFO L125 PetriNetUnfolderBase]: For 958/958 co-relation queries the response was YES. [2023-08-26 14:08:36,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9789 conditions, 4243 events. 2474/4243 cut-off events. For 958/958 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20306 event pairs, 808 based on Foata normal form. 9/3522 useless extension candidates. Maximal degree in co-relation 9778. Up to 3680 conditions per place. [2023-08-26 14:08:36,701 INFO L140 encePairwiseOnDemand]: 774/783 looper letters, 98 selfloop transitions, 14 changer transitions 0/119 dead transitions. [2023-08-26 14:08:36,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 651 flow [2023-08-26 14:08:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 14:08:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 14:08:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1119 transitions. [2023-08-26 14:08:36,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.285823754789272 [2023-08-26 14:08:36,704 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1119 transitions. [2023-08-26 14:08:36,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1119 transitions. [2023-08-26 14:08:36,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:36,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1119 transitions. [2023-08-26 14:08:36,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:36,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 783.0) internal successors, (4698), 6 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:36,712 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 783.0) internal successors, (4698), 6 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:36,712 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 319 flow. Second operand 5 states and 1119 transitions. [2023-08-26 14:08:36,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 651 flow [2023-08-26 14:08:36,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 119 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:08:36,716 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 406 flow [2023-08-26 14:08:36,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2023-08-26 14:08:36,717 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -43 predicate places. [2023-08-26 14:08:36,717 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 406 flow [2023-08-26 14:08:36,717 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 14:08:36,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:36,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:36,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 14:08:36,718 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 14:08:36,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:36,718 INFO L85 PathProgramCache]: Analyzing trace with hash 478365404, now seen corresponding path program 2 times [2023-08-26 14:08:36,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:36,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059987091] [2023-08-26 14:08:36,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:36,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:37,394 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 14:08:37,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:37,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059987091] [2023-08-26 14:08:37,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059987091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:37,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:37,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 14:08:37,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85057816] [2023-08-26 14:08:37,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:37,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 14:08:37,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:37,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 14:08:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 14:08:37,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 783 [2023-08-26 14:08:37,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 406 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 14:08:37,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:37,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 783 [2023-08-26 14:08:37,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:38,120 INFO L124 PetriNetUnfolderBase]: 2526/4343 cut-off events. [2023-08-26 14:08:38,120 INFO L125 PetriNetUnfolderBase]: For 1259/1259 co-relation queries the response was YES. [2023-08-26 14:08:38,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10230 conditions, 4343 events. 2526/4343 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 20961 event pairs, 1831 based on Foata normal form. 9/3612 useless extension candidates. Maximal degree in co-relation 10216. Up to 3936 conditions per place. [2023-08-26 14:08:38,140 INFO L140 encePairwiseOnDemand]: 776/783 looper letters, 96 selfloop transitions, 10 changer transitions 0/113 dead transitions. [2023-08-26 14:08:38,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 113 transitions, 682 flow [2023-08-26 14:08:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 14:08:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 14:08:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1314 transitions. [2023-08-26 14:08:38,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2796934865900383 [2023-08-26 14:08:38,143 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1314 transitions. [2023-08-26 14:08:38,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1314 transitions. [2023-08-26 14:08:38,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:38,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1314 transitions. [2023-08-26 14:08:38,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:38,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:38,151 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:38,151 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 406 flow. Second operand 6 states and 1314 transitions. [2023-08-26 14:08:38,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 113 transitions, 682 flow [2023-08-26 14:08:38,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 113 transitions, 680 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 14:08:38,157 INFO L231 Difference]: Finished difference. Result has 103 places, 96 transitions, 452 flow [2023-08-26 14:08:38,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=103, PETRI_TRANSITIONS=96} [2023-08-26 14:08:38,157 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -37 predicate places. [2023-08-26 14:08:38,157 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 96 transitions, 452 flow [2023-08-26 14:08:38,158 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 14:08:38,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:38,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:38,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 14:08:38,158 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 14:08:38,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash -357649760, now seen corresponding path program 3 times [2023-08-26 14:08:38,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:38,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900482347] [2023-08-26 14:08:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:38,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:38,886 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 14:08:38,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:38,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900482347] [2023-08-26 14:08:38,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900482347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:38,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:38,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 14:08:38,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60932184] [2023-08-26 14:08:38,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:38,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 14:08:38,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:38,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 14:08:38,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 14:08:38,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 783 [2023-08-26 14:08:38,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 96 transitions, 452 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 14:08:38,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:38,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 783 [2023-08-26 14:08:38,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:08:39,649 INFO L124 PetriNetUnfolderBase]: 2469/4281 cut-off events. [2023-08-26 14:08:39,649 INFO L125 PetriNetUnfolderBase]: For 1526/1526 co-relation queries the response was YES. [2023-08-26 14:08:39,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10014 conditions, 4281 events. 2469/4281 cut-off events. For 1526/1526 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 20641 event pairs, 1781 based on Foata normal form. 18/3567 useless extension candidates. Maximal degree in co-relation 9998. Up to 3675 conditions per place. [2023-08-26 14:08:39,668 INFO L140 encePairwiseOnDemand]: 776/783 looper letters, 89 selfloop transitions, 12 changer transitions 0/108 dead transitions. [2023-08-26 14:08:39,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 665 flow [2023-08-26 14:08:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 14:08:39,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 14:08:39,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1312 transitions. [2023-08-26 14:08:39,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2792677735206471 [2023-08-26 14:08:39,673 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1312 transitions. [2023-08-26 14:08:39,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1312 transitions. [2023-08-26 14:08:39,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:08:39,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1312 transitions. [2023-08-26 14:08:39,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.66666666666666) internal successors, (1312), 6 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:39,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:39,680 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:39,680 INFO L175 Difference]: Start difference. First operand has 103 places, 96 transitions, 452 flow. Second operand 6 states and 1312 transitions. [2023-08-26 14:08:39,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 665 flow [2023-08-26 14:08:39,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 108 transitions, 652 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 14:08:39,685 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 432 flow [2023-08-26 14:08:39,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=432, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-08-26 14:08:39,686 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -36 predicate places. [2023-08-26 14:08:39,686 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 432 flow [2023-08-26 14:08:39,686 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 14:08:39,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:08:39,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:08:39,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 14:08:39,687 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 14:08:39,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:08:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1027532242, now seen corresponding path program 1 times [2023-08-26 14:08:39,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:08:39,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894691913] [2023-08-26 14:08:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:08:39,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:08:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:08:57,265 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 14:08:57,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:08:57,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894691913] [2023-08-26 14:08:57,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894691913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:08:57,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:08:57,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 14:08:57,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422887605] [2023-08-26 14:08:57,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:08:57,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 14:08:57,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:08:57,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 14:08:57,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-26 14:08:57,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 783 [2023-08-26 14:08:57,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 432 flow. Second operand has 11 states, 11 states have (on average 218.27272727272728) internal successors, (2401), 11 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:08:57,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:08:57,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 783 [2023-08-26 14:08:57,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:04,366 INFO L124 PetriNetUnfolderBase]: 2467/4249 cut-off events. [2023-08-26 14:09:04,367 INFO L125 PetriNetUnfolderBase]: For 1533/1533 co-relation queries the response was YES. [2023-08-26 14:09:04,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10008 conditions, 4249 events. 2467/4249 cut-off events. For 1533/1533 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 20289 event pairs, 1835 based on Foata normal form. 0/3506 useless extension candidates. Maximal degree in co-relation 9992. Up to 4003 conditions per place. [2023-08-26 14:09:04,386 INFO L140 encePairwiseOnDemand]: 770/783 looper letters, 85 selfloop transitions, 19 changer transitions 1/112 dead transitions. [2023-08-26 14:09:04,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 112 transitions, 714 flow [2023-08-26 14:09:04,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 14:09:04,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 14:09:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2262 transitions. [2023-08-26 14:09:04,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28888888888888886 [2023-08-26 14:09:04,391 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2262 transitions. [2023-08-26 14:09:04,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2262 transitions. [2023-08-26 14:09:04,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:04,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2262 transitions. [2023-08-26 14:09:04,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 226.2) internal successors, (2262), 10 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:04,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 783.0) internal successors, (8613), 11 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:04,402 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 783.0) internal successors, (8613), 11 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:04,402 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 432 flow. Second operand 10 states and 2262 transitions. [2023-08-26 14:09:04,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 112 transitions, 714 flow [2023-08-26 14:09:04,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 112 transitions, 697 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 14:09:04,409 INFO L231 Difference]: Finished difference. Result has 113 places, 102 transitions, 534 flow [2023-08-26 14:09:04,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=534, PETRI_PLACES=113, PETRI_TRANSITIONS=102} [2023-08-26 14:09:04,409 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -27 predicate places. [2023-08-26 14:09:04,409 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 534 flow [2023-08-26 14:09:04,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 218.27272727272728) internal successors, (2401), 11 states have internal predecessors, (2401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:04,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:04,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:09:04,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 14:09:04,410 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 14:09:04,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash 233597410, now seen corresponding path program 1 times [2023-08-26 14:09:04,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:04,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262553264] [2023-08-26 14:09:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:04,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:05,391 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 14:09:05,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:05,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262553264] [2023-08-26 14:09:05,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262553264] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:05,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:05,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 14:09:05,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034328983] [2023-08-26 14:09:05,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:05,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 14:09:05,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 14:09:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-26 14:09:05,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 783 [2023-08-26 14:09:05,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 102 transitions, 534 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 14:09:05,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:05,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 783 [2023-08-26 14:09:05,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:06,149 INFO L124 PetriNetUnfolderBase]: 2636/4569 cut-off events. [2023-08-26 14:09:06,150 INFO L125 PetriNetUnfolderBase]: For 1677/1677 co-relation queries the response was YES. [2023-08-26 14:09:06,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10900 conditions, 4569 events. 2636/4569 cut-off events. For 1677/1677 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 22313 event pairs, 915 based on Foata normal form. 0/3786 useless extension candidates. Maximal degree in co-relation 10880. Up to 3457 conditions per place. [2023-08-26 14:09:06,173 INFO L140 encePairwiseOnDemand]: 772/783 looper letters, 119 selfloop transitions, 24 changer transitions 3/153 dead transitions. [2023-08-26 14:09:06,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 951 flow [2023-08-26 14:09:06,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 14:09:06,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 14:09:06,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1624 transitions. [2023-08-26 14:09:06,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2023-08-26 14:09:06,177 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1624 transitions. [2023-08-26 14:09:06,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1624 transitions. [2023-08-26 14:09:06,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:06,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1624 transitions. [2023-08-26 14:09:06,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 203.0) internal successors, (1624), 8 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:06,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 783.0) internal successors, (7047), 9 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:06,183 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 783.0) internal successors, (7047), 9 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:06,183 INFO L175 Difference]: Start difference. First operand has 113 places, 102 transitions, 534 flow. Second operand 8 states and 1624 transitions. [2023-08-26 14:09:06,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 951 flow [2023-08-26 14:09:06,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 153 transitions, 932 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-26 14:09:06,189 INFO L231 Difference]: Finished difference. Result has 119 places, 106 transitions, 609 flow [2023-08-26 14:09:06,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=609, PETRI_PLACES=119, PETRI_TRANSITIONS=106} [2023-08-26 14:09:06,190 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -21 predicate places. [2023-08-26 14:09:06,190 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 106 transitions, 609 flow [2023-08-26 14:09:06,190 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 14:09:06,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:06,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:09:06,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 14:09:06,191 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 14:09:06,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:06,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1788808744, now seen corresponding path program 2 times [2023-08-26 14:09:06,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:06,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832647442] [2023-08-26 14:09:06,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:06,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:07,292 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 14:09:07,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:07,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832647442] [2023-08-26 14:09:07,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832647442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:07,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:07,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 14:09:07,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315389065] [2023-08-26 14:09:07,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:07,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 14:09:07,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:07,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 14:09:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-26 14:09:07,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 783 [2023-08-26 14:09:07,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 106 transitions, 609 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 14:09:07,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:07,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 783 [2023-08-26 14:09:07,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:08,235 INFO L124 PetriNetUnfolderBase]: 2686/4641 cut-off events. [2023-08-26 14:09:08,236 INFO L125 PetriNetUnfolderBase]: For 2162/2162 co-relation queries the response was YES. [2023-08-26 14:09:08,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11440 conditions, 4641 events. 2686/4641 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 22798 event pairs, 961 based on Foata normal form. 0/3837 useless extension candidates. Maximal degree in co-relation 11417. Up to 3195 conditions per place. [2023-08-26 14:09:08,263 INFO L140 encePairwiseOnDemand]: 771/783 looper letters, 122 selfloop transitions, 28 changer transitions 3/160 dead transitions. [2023-08-26 14:09:08,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 160 transitions, 1056 flow [2023-08-26 14:09:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 14:09:08,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 14:09:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1816 transitions. [2023-08-26 14:09:08,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25769831133815807 [2023-08-26 14:09:08,267 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1816 transitions. [2023-08-26 14:09:08,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1816 transitions. [2023-08-26 14:09:08,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:08,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1816 transitions. [2023-08-26 14:09:08,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.77777777777777) internal successors, (1816), 9 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:08,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:08,274 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:08,274 INFO L175 Difference]: Start difference. First operand has 119 places, 106 transitions, 609 flow. Second operand 9 states and 1816 transitions. [2023-08-26 14:09:08,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 160 transitions, 1056 flow [2023-08-26 14:09:08,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 160 transitions, 1011 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-26 14:09:08,281 INFO L231 Difference]: Finished difference. Result has 124 places, 109 transitions, 661 flow [2023-08-26 14:09:08,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=661, PETRI_PLACES=124, PETRI_TRANSITIONS=109} [2023-08-26 14:09:08,282 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -16 predicate places. [2023-08-26 14:09:08,282 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 109 transitions, 661 flow [2023-08-26 14:09:08,282 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 14:09:08,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:08,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:09:08,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 14:09:08,283 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 14:09:08,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:08,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1788664594, now seen corresponding path program 3 times [2023-08-26 14:09:08,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:08,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375687907] [2023-08-26 14:09:08,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:08,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:09,114 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 14:09:09,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:09,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375687907] [2023-08-26 14:09:09,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375687907] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:09,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:09,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 14:09:09,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143552363] [2023-08-26 14:09:09,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:09,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 14:09:09,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:09,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 14:09:09,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-26 14:09:09,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 783 [2023-08-26 14:09:09,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 109 transitions, 661 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 14:09:09,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:09,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 783 [2023-08-26 14:09:09,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:10,056 INFO L124 PetriNetUnfolderBase]: 2660/4597 cut-off events. [2023-08-26 14:09:10,056 INFO L125 PetriNetUnfolderBase]: For 2329/2329 co-relation queries the response was YES. [2023-08-26 14:09:10,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11465 conditions, 4597 events. 2660/4597 cut-off events. For 2329/2329 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 22551 event pairs, 975 based on Foata normal form. 0/3808 useless extension candidates. Maximal degree in co-relation 11440. Up to 3195 conditions per place. [2023-08-26 14:09:10,093 INFO L140 encePairwiseOnDemand]: 773/783 looper letters, 114 selfloop transitions, 27 changer transitions 3/151 dead transitions. [2023-08-26 14:09:10,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 151 transitions, 1042 flow [2023-08-26 14:09:10,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 14:09:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 14:09:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1618 transitions. [2023-08-26 14:09:10,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25830140485312897 [2023-08-26 14:09:10,097 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1618 transitions. [2023-08-26 14:09:10,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1618 transitions. [2023-08-26 14:09:10,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:10,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1618 transitions. [2023-08-26 14:09:10,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.25) internal successors, (1618), 8 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:10,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 783.0) internal successors, (7047), 9 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:10,104 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 783.0) internal successors, (7047), 9 states have internal predecessors, (7047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:10,104 INFO L175 Difference]: Start difference. First operand has 124 places, 109 transitions, 661 flow. Second operand 8 states and 1618 transitions. [2023-08-26 14:09:10,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 151 transitions, 1042 flow [2023-08-26 14:09:10,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 151 transitions, 1009 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-26 14:09:10,114 INFO L231 Difference]: Finished difference. Result has 123 places, 107 transitions, 674 flow [2023-08-26 14:09:10,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=674, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2023-08-26 14:09:10,114 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -17 predicate places. [2023-08-26 14:09:10,114 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 674 flow [2023-08-26 14:09:10,115 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 14:09:10,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:10,115 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 14:09:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 14:09:10,115 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 14:09:10,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:10,115 INFO L85 PathProgramCache]: Analyzing trace with hash 974879672, now seen corresponding path program 1 times [2023-08-26 14:09:10,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:10,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419915361] [2023-08-26 14:09:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:10,843 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 14:09:10,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:10,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419915361] [2023-08-26 14:09:10,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419915361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:10,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:10,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 14:09:10,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878582999] [2023-08-26 14:09:10,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:10,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 14:09:10,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:10,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 14:09:10,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-26 14:09:10,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 783 [2023-08-26 14:09:10,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 674 flow. Second operand has 12 states, 12 states have (on average 198.41666666666666) internal successors, (2381), 12 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:10,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:10,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 783 [2023-08-26 14:09:10,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:11,761 INFO L124 PetriNetUnfolderBase]: 2828/4872 cut-off events. [2023-08-26 14:09:11,761 INFO L125 PetriNetUnfolderBase]: For 2729/2729 co-relation queries the response was YES. [2023-08-26 14:09:11,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12350 conditions, 4872 events. 2828/4872 cut-off events. For 2729/2729 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 24044 event pairs, 1957 based on Foata normal form. 0/4028 useless extension candidates. Maximal degree in co-relation 12325. Up to 4318 conditions per place. [2023-08-26 14:09:11,789 INFO L140 encePairwiseOnDemand]: 772/783 looper letters, 116 selfloop transitions, 23 changer transitions 3/149 dead transitions. [2023-08-26 14:09:11,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 149 transitions, 1114 flow [2023-08-26 14:09:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 14:09:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 14:09:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2085 transitions. [2023-08-26 14:09:11,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2662835249042146 [2023-08-26 14:09:11,794 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2085 transitions. [2023-08-26 14:09:11,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2085 transitions. [2023-08-26 14:09:11,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:11,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2085 transitions. [2023-08-26 14:09:11,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 208.5) internal successors, (2085), 10 states have internal predecessors, (2085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:11,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 783.0) internal successors, (8613), 11 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:11,804 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 783.0) internal successors, (8613), 11 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:11,804 INFO L175 Difference]: Start difference. First operand has 123 places, 107 transitions, 674 flow. Second operand 10 states and 2085 transitions. [2023-08-26 14:09:11,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 149 transitions, 1114 flow [2023-08-26 14:09:11,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 149 transitions, 1050 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-26 14:09:11,816 INFO L231 Difference]: Finished difference. Result has 129 places, 114 transitions, 754 flow [2023-08-26 14:09:11,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=754, PETRI_PLACES=129, PETRI_TRANSITIONS=114} [2023-08-26 14:09:11,816 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -11 predicate places. [2023-08-26 14:09:11,817 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 114 transitions, 754 flow [2023-08-26 14:09:11,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.41666666666666) internal successors, (2381), 12 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:11,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:11,817 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 14:09:11,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 14:09:11,817 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 14:09:11,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1247198632, now seen corresponding path program 1 times [2023-08-26 14:09:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:11,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187237067] [2023-08-26 14:09:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:11,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:12,949 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 14:09:12,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:12,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187237067] [2023-08-26 14:09:12,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187237067] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:12,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:12,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 14:09:12,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872228199] [2023-08-26 14:09:12,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:12,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 14:09:12,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:12,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 14:09:12,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-26 14:09:12,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 14:09:12,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 114 transitions, 754 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:12,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:12,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 14:09:12,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:14,501 INFO L124 PetriNetUnfolderBase]: 3023/5217 cut-off events. [2023-08-26 14:09:14,501 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2023-08-26 14:09:14,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13309 conditions, 5217 events. 3023/5217 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 26257 event pairs, 1174 based on Foata normal form. 9/4414 useless extension candidates. Maximal degree in co-relation 13280. Up to 4091 conditions per place. [2023-08-26 14:09:14,535 INFO L140 encePairwiseOnDemand]: 771/783 looper letters, 142 selfloop transitions, 34 changer transitions 3/186 dead transitions. [2023-08-26 14:09:14,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 186 transitions, 1341 flow [2023-08-26 14:09:14,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 14:09:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 14:09:14,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2255 transitions. [2023-08-26 14:09:14,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26181353767560667 [2023-08-26 14:09:14,539 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2255 transitions. [2023-08-26 14:09:14,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2255 transitions. [2023-08-26 14:09:14,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:14,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2255 transitions. [2023-08-26 14:09:14,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:14,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 783.0) internal successors, (9396), 12 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:14,549 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 783.0) internal successors, (9396), 12 states have internal predecessors, (9396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:14,549 INFO L175 Difference]: Start difference. First operand has 129 places, 114 transitions, 754 flow. Second operand 11 states and 2255 transitions. [2023-08-26 14:09:14,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 186 transitions, 1341 flow [2023-08-26 14:09:14,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 186 transitions, 1311 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 14:09:14,563 INFO L231 Difference]: Finished difference. Result has 140 places, 121 transitions, 919 flow [2023-08-26 14:09:14,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=919, PETRI_PLACES=140, PETRI_TRANSITIONS=121} [2023-08-26 14:09:14,564 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 0 predicate places. [2023-08-26 14:09:14,564 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 121 transitions, 919 flow [2023-08-26 14:09:14,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:14,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:14,565 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 14:09:14,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 14:09:14,565 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 14:09:14,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:14,565 INFO L85 PathProgramCache]: Analyzing trace with hash -994358324, now seen corresponding path program 1 times [2023-08-26 14:09:14,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:14,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606724406] [2023-08-26 14:09:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:14,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:14,747 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 14:09:14,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:14,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606724406] [2023-08-26 14:09:14,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606724406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:14,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:14,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 14:09:14,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669058352] [2023-08-26 14:09:14,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:14,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 14:09:14,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 14:09:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 14:09:14,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 783 [2023-08-26 14:09:14,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 121 transitions, 919 flow. Second operand has 9 states, 9 states have (on average 225.11111111111111) internal successors, (2026), 9 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:14,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:14,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 783 [2023-08-26 14:09:14,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:15,350 INFO L124 PetriNetUnfolderBase]: 2818/4876 cut-off events. [2023-08-26 14:09:15,351 INFO L125 PetriNetUnfolderBase]: For 4361/4361 co-relation queries the response was YES. [2023-08-26 14:09:15,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12795 conditions, 4876 events. 2818/4876 cut-off events. For 4361/4361 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 24224 event pairs, 930 based on Foata normal form. 0/4237 useless extension candidates. Maximal degree in co-relation 12760. Up to 2920 conditions per place. [2023-08-26 14:09:15,383 INFO L140 encePairwiseOnDemand]: 775/783 looper letters, 140 selfloop transitions, 14 changer transitions 3/164 dead transitions. [2023-08-26 14:09:15,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 164 transitions, 1302 flow [2023-08-26 14:09:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 14:09:15,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 14:09:15,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1674 transitions. [2023-08-26 14:09:15,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3054187192118227 [2023-08-26 14:09:15,385 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1674 transitions. [2023-08-26 14:09:15,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1674 transitions. [2023-08-26 14:09:15,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:15,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1674 transitions. [2023-08-26 14:09:15,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 239.14285714285714) internal successors, (1674), 7 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:15,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 783.0) internal successors, (6264), 8 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:15,391 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 783.0) internal successors, (6264), 8 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:15,391 INFO L175 Difference]: Start difference. First operand has 140 places, 121 transitions, 919 flow. Second operand 7 states and 1674 transitions. [2023-08-26 14:09:15,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 164 transitions, 1302 flow [2023-08-26 14:09:15,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 164 transitions, 1270 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-26 14:09:15,410 INFO L231 Difference]: Finished difference. Result has 140 places, 114 transitions, 850 flow [2023-08-26 14:09:15,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=140, PETRI_TRANSITIONS=114} [2023-08-26 14:09:15,411 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 0 predicate places. [2023-08-26 14:09:15,411 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 114 transitions, 850 flow [2023-08-26 14:09:15,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 225.11111111111111) internal successors, (2026), 9 states have internal predecessors, (2026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:15,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:15,411 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 14:09:15,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 14:09:15,411 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 14:09:15,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash 799208026, now seen corresponding path program 2 times [2023-08-26 14:09:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:15,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722623970] [2023-08-26 14:09:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:15,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:16,348 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 14:09:16,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:16,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722623970] [2023-08-26 14:09:16,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722623970] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:16,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:16,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 14:09:16,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305739280] [2023-08-26 14:09:16,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:16,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 14:09:16,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:16,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 14:09:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-26 14:09:16,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 14:09:16,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 114 transitions, 850 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:16,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:16,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 14:09:16,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:17,364 INFO L124 PetriNetUnfolderBase]: 2805/4870 cut-off events. [2023-08-26 14:09:17,364 INFO L125 PetriNetUnfolderBase]: For 4725/4725 co-relation queries the response was YES. [2023-08-26 14:09:17,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12850 conditions, 4870 events. 2805/4870 cut-off events. For 4725/4725 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 24230 event pairs, 913 based on Foata normal form. 9/4256 useless extension candidates. Maximal degree in co-relation 12815. Up to 3204 conditions per place. [2023-08-26 14:09:17,397 INFO L140 encePairwiseOnDemand]: 773/783 looper letters, 123 selfloop transitions, 33 changer transitions 3/166 dead transitions. [2023-08-26 14:09:17,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 166 transitions, 1297 flow [2023-08-26 14:09:17,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 14:09:17,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 14:09:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1849 transitions. [2023-08-26 14:09:17,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2623811551014616 [2023-08-26 14:09:17,400 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1849 transitions. [2023-08-26 14:09:17,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1849 transitions. [2023-08-26 14:09:17,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:17,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1849 transitions. [2023-08-26 14:09:17,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.44444444444446) internal successors, (1849), 9 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:17,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:17,407 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:17,408 INFO L175 Difference]: Start difference. First operand has 140 places, 114 transitions, 850 flow. Second operand 9 states and 1849 transitions. [2023-08-26 14:09:17,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 166 transitions, 1297 flow [2023-08-26 14:09:17,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 166 transitions, 1270 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 14:09:17,422 INFO L231 Difference]: Finished difference. Result has 145 places, 115 transitions, 921 flow [2023-08-26 14:09:17,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=921, PETRI_PLACES=145, PETRI_TRANSITIONS=115} [2023-08-26 14:09:17,423 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2023-08-26 14:09:17,423 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 115 transitions, 921 flow [2023-08-26 14:09:17,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:17,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:17,424 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 14:09:17,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 14:09:17,424 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 14:09:17,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:17,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1559139422, now seen corresponding path program 3 times [2023-08-26 14:09:17,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:17,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859249384] [2023-08-26 14:09:17,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:17,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:18,266 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 14:09:18,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:18,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859249384] [2023-08-26 14:09:18,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859249384] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:18,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:18,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 14:09:18,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224935308] [2023-08-26 14:09:18,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:18,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 14:09:18,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:18,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 14:09:18,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-26 14:09:18,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 14:09:18,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 115 transitions, 921 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:18,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:18,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 14:09:18,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:19,199 INFO L124 PetriNetUnfolderBase]: 2831/4914 cut-off events. [2023-08-26 14:09:19,199 INFO L125 PetriNetUnfolderBase]: For 5654/5654 co-relation queries the response was YES. [2023-08-26 14:09:19,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13167 conditions, 4914 events. 2831/4914 cut-off events. For 5654/5654 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 24551 event pairs, 834 based on Foata normal form. 9/4296 useless extension candidates. Maximal degree in co-relation 13131. Up to 2923 conditions per place. [2023-08-26 14:09:19,231 INFO L140 encePairwiseOnDemand]: 773/783 looper letters, 123 selfloop transitions, 34 changer transitions 3/167 dead transitions. [2023-08-26 14:09:19,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 167 transitions, 1371 flow [2023-08-26 14:09:19,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 14:09:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 14:09:19,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1848 transitions. [2023-08-26 14:09:19,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2622392507449979 [2023-08-26 14:09:19,234 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1848 transitions. [2023-08-26 14:09:19,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1848 transitions. [2023-08-26 14:09:19,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:19,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1848 transitions. [2023-08-26 14:09:19,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.33333333333334) internal successors, (1848), 9 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:19,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:19,241 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:19,242 INFO L175 Difference]: Start difference. First operand has 145 places, 115 transitions, 921 flow. Second operand 9 states and 1848 transitions. [2023-08-26 14:09:19,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 167 transitions, 1371 flow [2023-08-26 14:09:19,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 167 transitions, 1308 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-26 14:09:19,261 INFO L231 Difference]: Finished difference. Result has 148 places, 116 transitions, 946 flow [2023-08-26 14:09:19,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=148, PETRI_TRANSITIONS=116} [2023-08-26 14:09:19,262 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 8 predicate places. [2023-08-26 14:09:19,262 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 116 transitions, 946 flow [2023-08-26 14:09:19,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:19,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:19,263 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 14:09:19,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 14:09:19,263 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:09:19,263 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:19,263 INFO L85 PathProgramCache]: Analyzing trace with hash 156499844, now seen corresponding path program 4 times [2023-08-26 14:09:19,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:19,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410659420] [2023-08-26 14:09:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:19,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:20,043 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 14:09:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:20,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410659420] [2023-08-26 14:09:20,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410659420] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:20,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:20,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 14:09:20,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517448145] [2023-08-26 14:09:20,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:20,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 14:09:20,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:20,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 14:09:20,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-08-26 14:09:20,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 14:09:20,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 116 transitions, 946 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:20,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:20,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 14:09:20,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:21,048 INFO L124 PetriNetUnfolderBase]: 2818/4892 cut-off events. [2023-08-26 14:09:21,048 INFO L125 PetriNetUnfolderBase]: For 6202/6202 co-relation queries the response was YES. [2023-08-26 14:09:21,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13181 conditions, 4892 events. 2818/4892 cut-off events. For 6202/6202 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 24401 event pairs, 832 based on Foata normal form. 9/4278 useless extension candidates. Maximal degree in co-relation 13144. Up to 2923 conditions per place. [2023-08-26 14:09:21,077 INFO L140 encePairwiseOnDemand]: 774/783 looper letters, 122 selfloop transitions, 33 changer transitions 3/165 dead transitions. [2023-08-26 14:09:21,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 165 transitions, 1376 flow [2023-08-26 14:09:21,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 14:09:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 14:09:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1845 transitions. [2023-08-26 14:09:21,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26181353767560667 [2023-08-26 14:09:21,079 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1845 transitions. [2023-08-26 14:09:21,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1845 transitions. [2023-08-26 14:09:21,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:21,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1845 transitions. [2023-08-26 14:09:21,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,085 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,085 INFO L175 Difference]: Start difference. First operand has 148 places, 116 transitions, 946 flow. Second operand 9 states and 1845 transitions. [2023-08-26 14:09:21,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 165 transitions, 1376 flow [2023-08-26 14:09:21,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 165 transitions, 1319 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-26 14:09:21,100 INFO L231 Difference]: Finished difference. Result has 150 places, 116 transitions, 967 flow [2023-08-26 14:09:21,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=967, PETRI_PLACES=150, PETRI_TRANSITIONS=116} [2023-08-26 14:09:21,101 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 10 predicate places. [2023-08-26 14:09:21,101 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 116 transitions, 967 flow [2023-08-26 14:09:21,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:21,101 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 14:09:21,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 14:09:21,102 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 14:09:21,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:21,102 INFO L85 PathProgramCache]: Analyzing trace with hash 2129887938, now seen corresponding path program 1 times [2023-08-26 14:09:21,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:21,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452328816] [2023-08-26 14:09:21,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:21,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:21,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:09:21,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452328816] [2023-08-26 14:09:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452328816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:21,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:21,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:09:21,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830844769] [2023-08-26 14:09:21,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:21,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:09:21,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:21,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:09:21,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:09:21,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 783 [2023-08-26 14:09:21,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 116 transitions, 967 flow. Second operand has 4 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:21,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 783 [2023-08-26 14:09:21,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:21,806 INFO L124 PetriNetUnfolderBase]: 3398/5866 cut-off events. [2023-08-26 14:09:21,807 INFO L125 PetriNetUnfolderBase]: For 8865/8865 co-relation queries the response was YES. [2023-08-26 14:09:21,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16027 conditions, 5866 events. 3398/5866 cut-off events. For 8865/8865 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 30903 event pairs, 1584 based on Foata normal form. 20/5157 useless extension candidates. Maximal degree in co-relation 15990. Up to 4663 conditions per place. [2023-08-26 14:09:21,855 INFO L140 encePairwiseOnDemand]: 778/783 looper letters, 158 selfloop transitions, 3 changer transitions 0/168 dead transitions. [2023-08-26 14:09:21,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 168 transitions, 1603 flow [2023-08-26 14:09:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 14:09:21,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 14:09:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1075 transitions. [2023-08-26 14:09:21,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34323116219667943 [2023-08-26 14:09:21,857 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1075 transitions. [2023-08-26 14:09:21,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1075 transitions. [2023-08-26 14:09:21,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:21,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1075 transitions. [2023-08-26 14:09:21,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 268.75) internal successors, (1075), 4 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 783.0) internal successors, (3915), 5 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,860 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 783.0) internal successors, (3915), 5 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,860 INFO L175 Difference]: Start difference. First operand has 150 places, 116 transitions, 967 flow. Second operand 4 states and 1075 transitions. [2023-08-26 14:09:21,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 168 transitions, 1603 flow [2023-08-26 14:09:21,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 1495 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-08-26 14:09:21,879 INFO L231 Difference]: Finished difference. Result has 145 places, 117 transitions, 905 flow [2023-08-26 14:09:21,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=905, PETRI_PLACES=145, PETRI_TRANSITIONS=117} [2023-08-26 14:09:21,880 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2023-08-26 14:09:21,880 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 117 transitions, 905 flow [2023-08-26 14:09:21,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:21,881 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 14:09:21,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 14:09:21,881 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:09:21,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:21,881 INFO L85 PathProgramCache]: Analyzing trace with hash -913856181, now seen corresponding path program 1 times [2023-08-26 14:09:21,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:21,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905729190] [2023-08-26 14:09:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:21,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:21,923 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 14:09:21,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:21,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905729190] [2023-08-26 14:09:21,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905729190] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:21,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:21,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:09:21,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905004113] [2023-08-26 14:09:21,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:21,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:09:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:09:21,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:09:21,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 783 [2023-08-26 14:09:21,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 117 transitions, 905 flow. Second operand has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:21,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:21,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 783 [2023-08-26 14:09:21,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:22,290 INFO L124 PetriNetUnfolderBase]: 1959/3534 cut-off events. [2023-08-26 14:09:22,290 INFO L125 PetriNetUnfolderBase]: For 5940/5947 co-relation queries the response was YES. [2023-08-26 14:09:22,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9739 conditions, 3534 events. 1959/3534 cut-off events. For 5940/5947 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 17287 event pairs, 1016 based on Foata normal form. 96/3283 useless extension candidates. Maximal degree in co-relation 9702. Up to 1949 conditions per place. [2023-08-26 14:09:22,310 INFO L140 encePairwiseOnDemand]: 779/783 looper letters, 106 selfloop transitions, 3 changer transitions 4/128 dead transitions. [2023-08-26 14:09:22,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 128 transitions, 1165 flow [2023-08-26 14:09:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:09:22,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:09:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1067 transitions. [2023-08-26 14:09:22,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45423584504044273 [2023-08-26 14:09:22,312 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1067 transitions. [2023-08-26 14:09:22,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1067 transitions. [2023-08-26 14:09:22,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:22,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1067 transitions. [2023-08-26 14:09:22,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.6666666666667) internal successors, (1067), 3 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,315 INFO L175 Difference]: Start difference. First operand has 145 places, 117 transitions, 905 flow. Second operand 3 states and 1067 transitions. [2023-08-26 14:09:22,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 128 transitions, 1165 flow [2023-08-26 14:09:22,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 128 transitions, 1151 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 14:09:22,330 INFO L231 Difference]: Finished difference. Result has 146 places, 113 transitions, 894 flow [2023-08-26 14:09:22,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=894, PETRI_PLACES=146, PETRI_TRANSITIONS=113} [2023-08-26 14:09:22,331 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 6 predicate places. [2023-08-26 14:09:22,331 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 113 transitions, 894 flow [2023-08-26 14:09:22,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:22,331 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 14:09:22,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 14:09:22,331 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 14:09:22,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:22,332 INFO L85 PathProgramCache]: Analyzing trace with hash 2096569285, now seen corresponding path program 1 times [2023-08-26 14:09:22,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:22,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411059865] [2023-08-26 14:09:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:22,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:22,409 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 14:09:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411059865] [2023-08-26 14:09:22,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411059865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:22,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:22,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:09:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949367178] [2023-08-26 14:09:22,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:22,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:09:22,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:22,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:09:22,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:09:22,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 783 [2023-08-26 14:09:22,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 113 transitions, 894 flow. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:22,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 783 [2023-08-26 14:09:22,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:22,718 INFO L124 PetriNetUnfolderBase]: 1716/3192 cut-off events. [2023-08-26 14:09:22,718 INFO L125 PetriNetUnfolderBase]: For 4584/4589 co-relation queries the response was YES. [2023-08-26 14:09:22,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9054 conditions, 3192 events. 1716/3192 cut-off events. For 4584/4589 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15669 event pairs, 569 based on Foata normal form. 59/3122 useless extension candidates. Maximal degree in co-relation 9016. Up to 2195 conditions per place. [2023-08-26 14:09:22,735 INFO L140 encePairwiseOnDemand]: 777/783 looper letters, 104 selfloop transitions, 6 changer transitions 1/126 dead transitions. [2023-08-26 14:09:22,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 126 transitions, 1173 flow [2023-08-26 14:09:22,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:09:22,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:09:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-26 14:09:22,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-26 14:09:22,736 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-26 14:09:22,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-26 14:09:22,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:22,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-26 14:09:22,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,739 INFO L175 Difference]: Start difference. First operand has 146 places, 113 transitions, 894 flow. Second operand 3 states and 1044 transitions. [2023-08-26 14:09:22,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 126 transitions, 1173 flow [2023-08-26 14:09:22,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 126 transitions, 1167 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:09:22,750 INFO L231 Difference]: Finished difference. Result has 145 places, 112 transitions, 896 flow [2023-08-26 14:09:22,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=896, PETRI_PLACES=145, PETRI_TRANSITIONS=112} [2023-08-26 14:09:22,751 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2023-08-26 14:09:22,751 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 112 transitions, 896 flow [2023-08-26 14:09:22,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:22,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:22,751 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 14:09:22,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 14:09:22,752 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 14:09:22,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash -114335093, now seen corresponding path program 1 times [2023-08-26 14:09:22,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:22,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915283984] [2023-08-26 14:09:22,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:22,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:24,150 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 14:09:24,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:24,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915283984] [2023-08-26 14:09:24,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915283984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:24,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:24,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 14:09:24,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741385680] [2023-08-26 14:09:24,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:24,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 14:09:24,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:24,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 14:09:24,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-08-26 14:09:24,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 14:09:24,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 112 transitions, 896 flow. Second operand has 15 states, 15 states have (on average 193.93333333333334) internal successors, (2909), 15 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:24,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:24,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 14:09:24,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:25,663 INFO L124 PetriNetUnfolderBase]: 1261/2364 cut-off events. [2023-08-26 14:09:25,663 INFO L125 PetriNetUnfolderBase]: For 4462/4464 co-relation queries the response was YES. [2023-08-26 14:09:25,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7301 conditions, 2364 events. 1261/2364 cut-off events. For 4462/4464 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10513 event pairs, 672 based on Foata normal form. 10/2312 useless extension candidates. Maximal degree in co-relation 7263. Up to 1551 conditions per place. [2023-08-26 14:09:25,675 INFO L140 encePairwiseOnDemand]: 769/783 looper letters, 149 selfloop transitions, 40 changer transitions 17/212 dead transitions. [2023-08-26 14:09:25,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 212 transitions, 1619 flow [2023-08-26 14:09:25,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 14:09:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 14:09:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3824 transitions. [2023-08-26 14:09:25,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25704107010822075 [2023-08-26 14:09:25,679 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3824 transitions. [2023-08-26 14:09:25,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3824 transitions. [2023-08-26 14:09:25,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:25,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3824 transitions. [2023-08-26 14:09:25,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 201.26315789473685) internal successors, (3824), 19 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:25,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 783.0) internal successors, (15660), 20 states have internal predecessors, (15660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:25,690 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 783.0) internal successors, (15660), 20 states have internal predecessors, (15660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:25,690 INFO L175 Difference]: Start difference. First operand has 145 places, 112 transitions, 896 flow. Second operand 19 states and 3824 transitions. [2023-08-26 14:09:25,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 212 transitions, 1619 flow [2023-08-26 14:09:25,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 212 transitions, 1601 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 14:09:25,704 INFO L231 Difference]: Finished difference. Result has 165 places, 122 transitions, 1049 flow [2023-08-26 14:09:25,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1049, PETRI_PLACES=165, PETRI_TRANSITIONS=122} [2023-08-26 14:09:25,704 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 25 predicate places. [2023-08-26 14:09:25,704 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 122 transitions, 1049 flow [2023-08-26 14:09:25,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 193.93333333333334) internal successors, (2909), 15 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:25,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:25,705 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 14:09:25,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 14:09:25,705 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 14:09:25,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1068339291, now seen corresponding path program 2 times [2023-08-26 14:09:25,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:25,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670281641] [2023-08-26 14:09:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:25,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:25,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:26,639 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 14:09:26,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:26,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670281641] [2023-08-26 14:09:26,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670281641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:26,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:26,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 14:09:26,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928767476] [2023-08-26 14:09:26,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:26,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 14:09:26,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:26,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 14:09:26,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-26 14:09:26,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 14:09:26,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 122 transitions, 1049 flow. Second operand has 15 states, 15 states have (on average 193.93333333333334) internal successors, (2909), 15 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:26,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:26,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 14:09:26,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:27,440 INFO L124 PetriNetUnfolderBase]: 1316/2464 cut-off events. [2023-08-26 14:09:27,441 INFO L125 PetriNetUnfolderBase]: For 4944/4946 co-relation queries the response was YES. [2023-08-26 14:09:27,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7783 conditions, 2464 events. 1316/2464 cut-off events. For 4944/4946 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 11054 event pairs, 544 based on Foata normal form. 9/2411 useless extension candidates. Maximal degree in co-relation 7741. Up to 1204 conditions per place. [2023-08-26 14:09:27,455 INFO L140 encePairwiseOnDemand]: 770/783 looper letters, 123 selfloop transitions, 44 changer transitions 10/183 dead transitions. [2023-08-26 14:09:27,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 183 transitions, 1568 flow [2023-08-26 14:09:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 14:09:27,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 14:09:27,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2437 transitions. [2023-08-26 14:09:27,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25936568752660705 [2023-08-26 14:09:27,458 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2437 transitions. [2023-08-26 14:09:27,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2437 transitions. [2023-08-26 14:09:27,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:27,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2437 transitions. [2023-08-26 14:09:27,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 203.08333333333334) internal successors, (2437), 12 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:27,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 783.0) internal successors, (10179), 13 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:27,465 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 783.0) internal successors, (10179), 13 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:27,465 INFO L175 Difference]: Start difference. First operand has 165 places, 122 transitions, 1049 flow. Second operand 12 states and 2437 transitions. [2023-08-26 14:09:27,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 183 transitions, 1568 flow [2023-08-26 14:09:27,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 183 transitions, 1476 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-26 14:09:27,480 INFO L231 Difference]: Finished difference. Result has 169 places, 126 transitions, 1106 flow [2023-08-26 14:09:27,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1106, PETRI_PLACES=169, PETRI_TRANSITIONS=126} [2023-08-26 14:09:27,480 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 29 predicate places. [2023-08-26 14:09:27,480 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 126 transitions, 1106 flow [2023-08-26 14:09:27,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 193.93333333333334) internal successors, (2909), 15 states have internal predecessors, (2909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:27,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:27,481 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 14:09:27,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 14:09:27,481 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 14:09:27,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:27,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1548208109, now seen corresponding path program 3 times [2023-08-26 14:09:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:27,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166061979] [2023-08-26 14:09:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:27,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:28,385 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 14:09:28,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:28,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166061979] [2023-08-26 14:09:28,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166061979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:28,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:28,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-08-26 14:09:28,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140132461] [2023-08-26 14:09:28,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:28,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 14:09:28,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:28,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 14:09:28,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-26 14:09:28,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 14:09:28,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 126 transitions, 1106 flow. Second operand has 16 states, 16 states have (on average 193.8125) internal successors, (3101), 16 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:28,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:28,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 14:09:28,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:29,322 INFO L124 PetriNetUnfolderBase]: 1579/2976 cut-off events. [2023-08-26 14:09:29,322 INFO L125 PetriNetUnfolderBase]: For 5730/5732 co-relation queries the response was YES. [2023-08-26 14:09:29,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9345 conditions, 2976 events. 1579/2976 cut-off events. For 5730/5732 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 14276 event pairs, 439 based on Foata normal form. 9/2892 useless extension candidates. Maximal degree in co-relation 9299. Up to 970 conditions per place. [2023-08-26 14:09:29,342 INFO L140 encePairwiseOnDemand]: 767/783 looper letters, 150 selfloop transitions, 56 changer transitions 14/226 dead transitions. [2023-08-26 14:09:29,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 226 transitions, 1850 flow [2023-08-26 14:09:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 14:09:29,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 14:09:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3248 transitions. [2023-08-26 14:09:29,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2023-08-26 14:09:29,345 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3248 transitions. [2023-08-26 14:09:29,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3248 transitions. [2023-08-26 14:09:29,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:29,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3248 transitions. [2023-08-26 14:09:29,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 203.0) internal successors, (3248), 16 states have internal predecessors, (3248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:29,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 783.0) internal successors, (13311), 17 states have internal predecessors, (13311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:29,358 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 783.0) internal successors, (13311), 17 states have internal predecessors, (13311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:29,358 INFO L175 Difference]: Start difference. First operand has 169 places, 126 transitions, 1106 flow. Second operand 16 states and 3248 transitions. [2023-08-26 14:09:29,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 226 transitions, 1850 flow [2023-08-26 14:09:29,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 226 transitions, 1764 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-08-26 14:09:29,381 INFO L231 Difference]: Finished difference. Result has 181 places, 132 transitions, 1230 flow [2023-08-26 14:09:29,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1230, PETRI_PLACES=181, PETRI_TRANSITIONS=132} [2023-08-26 14:09:29,382 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 41 predicate places. [2023-08-26 14:09:29,382 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 132 transitions, 1230 flow [2023-08-26 14:09:29,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 193.8125) internal successors, (3101), 16 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:29,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:29,383 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 14:09:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 14:09:29,383 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:09:29,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:29,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1354022497, now seen corresponding path program 4 times [2023-08-26 14:09:29,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:29,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163091627] [2023-08-26 14:09:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:09:30,188 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 14:09:30,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:09:30,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163091627] [2023-08-26 14:09:30,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163091627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:09:30,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:09:30,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-08-26 14:09:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303156002] [2023-08-26 14:09:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:09:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 14:09:30,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:09:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 14:09:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-08-26 14:09:30,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 14:09:30,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 132 transitions, 1230 flow. Second operand has 16 states, 16 states have (on average 193.8125) internal successors, (3101), 16 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:30,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:09:30,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 14:09:30,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:09:31,020 INFO L124 PetriNetUnfolderBase]: 1361/2565 cut-off events. [2023-08-26 14:09:31,020 INFO L125 PetriNetUnfolderBase]: For 6479/6479 co-relation queries the response was YES. [2023-08-26 14:09:31,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8703 conditions, 2565 events. 1361/2565 cut-off events. For 6479/6479 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11721 event pairs, 276 based on Foata normal form. 14/2529 useless extension candidates. Maximal degree in co-relation 8653. Up to 847 conditions per place. [2023-08-26 14:09:31,033 INFO L140 encePairwiseOnDemand]: 771/783 looper letters, 128 selfloop transitions, 46 changer transitions 10/190 dead transitions. [2023-08-26 14:09:31,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 190 transitions, 1757 flow [2023-08-26 14:09:31,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 14:09:31,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 14:09:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2433 transitions. [2023-08-26 14:09:31,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25893997445721584 [2023-08-26 14:09:31,036 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2433 transitions. [2023-08-26 14:09:31,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2433 transitions. [2023-08-26 14:09:31,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:09:31,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2433 transitions. [2023-08-26 14:09:31,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 202.75) internal successors, (2433), 12 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:31,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 783.0) internal successors, (10179), 13 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:31,044 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 783.0) internal successors, (10179), 13 states have internal predecessors, (10179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:31,044 INFO L175 Difference]: Start difference. First operand has 181 places, 132 transitions, 1230 flow. Second operand 12 states and 2433 transitions. [2023-08-26 14:09:31,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 190 transitions, 1757 flow [2023-08-26 14:09:31,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 190 transitions, 1665 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-26 14:09:31,062 INFO L231 Difference]: Finished difference. Result has 184 places, 134 transitions, 1282 flow [2023-08-26 14:09:31,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1282, PETRI_PLACES=184, PETRI_TRANSITIONS=134} [2023-08-26 14:09:31,063 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 44 predicate places. [2023-08-26 14:09:31,063 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 134 transitions, 1282 flow [2023-08-26 14:09:31,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 193.8125) internal successors, (3101), 16 states have internal predecessors, (3101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:09:31,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:09:31,064 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 14:09:31,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 14:09:31,064 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 14:09:31,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:09:31,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1386428107, now seen corresponding path program 1 times [2023-08-26 14:09:31,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:09:31,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397886609] [2023-08-26 14:09:31,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:09:31,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:09:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-08-26 14:21:22,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 14:21:22,834 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 14:21:22,835 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 14:21:22,838 INFO L158 Benchmark]: Toolchain (without parser) took 796930.18ms. Allocated memory was 352.3MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 326.8MB in the beginning and 3.8GB in the end (delta: -3.5GB). Peak memory consumption was 6.9GB. Max. memory is 16.0GB. [2023-08-26 14:21:22,838 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 352.3MB. Free memory is still 328.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 14:21:22,838 INFO L158 Benchmark]: CACSL2BoogieTranslator took 698.42ms. Allocated memory is still 352.3MB. Free memory was 326.8MB in the beginning and 296.5MB in the end (delta: 30.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-26 14:21:22,839 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.28ms. Allocated memory is still 352.3MB. Free memory was 296.5MB in the beginning and 293.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 14:21:22,839 INFO L158 Benchmark]: Boogie Preprocessor took 60.02ms. Allocated memory is still 352.3MB. Free memory was 293.4MB in the beginning and 291.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:21:22,839 INFO L158 Benchmark]: RCFGBuilder took 745.67ms. Allocated memory is still 352.3MB. Free memory was 290.9MB in the beginning and 309.1MB in the end (delta: -18.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 14:21:22,839 INFO L158 Benchmark]: TraceAbstraction took 795336.50ms. Allocated memory was 352.3MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 308.3MB in the beginning and 3.8GB in the end (delta: -3.5GB). Peak memory consumption was 6.9GB. Max. memory is 16.0GB. [2023-08-26 14:21:22,840 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 352.3MB. Free memory is still 328.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 698.42ms. Allocated memory is still 352.3MB. Free memory was 326.8MB in the beginning and 296.5MB in the end (delta: 30.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 84.28ms. Allocated memory is still 352.3MB. Free memory was 296.5MB in the beginning and 293.4MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 60.02ms. Allocated memory is still 352.3MB. Free memory was 293.4MB in the beginning and 291.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 745.67ms. Allocated memory is still 352.3MB. Free memory was 290.9MB in the beginning and 309.1MB in the end (delta: -18.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 795336.50ms. Allocated memory was 352.3MB in the beginning and 7.4GB in the end (delta: 7.0GB). Free memory was 308.3MB in the beginning and 3.8GB in the end (delta: -3.5GB). Peak memory consumption was 6.9GB. 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: 13.9s, 332 PlacesBefore, 140 PlacesAfterwards, 343 TransitionsBefore, 144 TransitionsAfterwards, 30836 CoEnabledTransitionPairs, 8 FixpointIterations, 109 TrivialSequentialCompositions, 283 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 24 ConcurrentYvCompositions, 7 ChoiceCompositions, 429 TotalNumberOfCompositions, 108870 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 46921, independent: 45684, independent conditional: 0, independent unconditional: 45684, dependent: 1237, dependent conditional: 0, dependent unconditional: 1237, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 19717, independent: 19550, independent conditional: 0, independent unconditional: 19550, dependent: 167, dependent conditional: 0, dependent unconditional: 167, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 46921, independent: 26134, independent conditional: 0, independent unconditional: 26134, dependent: 1070, dependent conditional: 0, dependent unconditional: 1070, unknown: 19717, unknown conditional: 0, unknown unconditional: 19717] , Statistics on independence cache: Total cache size (in pairs): 1187, Positive cache size: 1095, Positive conditional cache size: 0, Positive unconditional cache size: 1095, Negative cache size: 92, Negative conditional cache size: 0, Negative unconditional cache size: 92, 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